M7

Class A fire is the combustion of:
Wood and paper
Electrical equipment
Metal
Metal fire is classified as
Class A
Class C
Class D
Colour of CO2 extinguisher:
Black bottle
Green bottle
Blue bottle
Fight an electrical fire and a metal fire with:
Water and BCF respectively
Foam and carbon dioxide respectively
Carbon dioxide and dry powder respectively
Electrical type fire should be put out by:
Water type fire extinguishers
Chemical dry powder type fire extinguishers
Carbon dioxide type fire extinguishers
In relation to the type of fire and extinguisher to be used, which one of the following statemen correct?
A carbon dioxide extinguisher performs best on a class D fire
A halogenated hydrocarbon extinguisher (Halon 1301 or Freon 13) performs best on a class B and C fire
A dry powder extinguisher performs best on a class A fire
Class B fire, should be fought with:
CO2 and water
CO2 and dry powder
Foam, CO2, BCF, Dry powder
Three common extinguishers on aircraft
BCF, CO2, nitrogen
BCF, CO2, nitrogen with compressed air
BCF, CO2, nitrogen with compressed powder
First response to engine fire is to:
Cut off engine fuel
Remove oxygen
What colour is Reactive label?
Red
Yellow
Green
The most suitable distance to discharge a fire extinguisher is
About 6 ft from the fire
At least 10 feet from the fire
About 6 ft with downwind or 10 ft with upwind from the fire
The point at which the combustion of fuel can occur is called
Kindle point
Detonation point
Fire point
Most dangerous practice connecting oxygen bottle
Placing under hot sun
Grease in fittings / Lubricate with grease
Which is the most likely to catch fire?
Oxygen system is contaminated with dirt, oil or grease
Hydraulic system leaks internally
Fuel system flame arrestors are installed
When drill a flammable material
Use pneumatic when thick less 1/4inch
Use electrical drill
Use pneumatic for fire hazard
High fire risk on engine is having…
Distortion or damage cowlings
Open circuit igniters
Gaps around a firewall
A/C on ground, effective fire precaution
No smoking
What safety precaution when doing maintenance with undercarriage air/oil fitting?
Depressurize air to avoid injury
To protect yourself from polyurethane dust, you should:
Wear facemask with independent air supply
Wear a goggle
Apply cream to your arms
Why do we need to secure compressed air bottles?
Broken valve may be dangerous, and the projectile of bottles hit personnel *
After any battery electrolyte spillage, the area must be thoroughly cleaned and neutralized, which would be checked by litmus paper:
Changing to a blue colour
Changing to a pink colour
No changing colour
Electrolyte spillage from an aircraft battery is:
Treated with water and then cleaned with wire wool
Use neutralizing agent and then re-protected
Left to vent in normal atmospheric conditions
The Time Domain Reflectometer is used to measure
Reflection coefficient of coaxial
CRT of oscilloscope display stable:
A generated” time base” is in time
B vertical and horizontal sweep synchronously
C trigger continue to redraw the waveform
Defect of coil spring
Coil binding
The environment under which calibration is done:
Always makes the calibration result doubtful
No difference if compensation corrections are applied
Provide controlled environmental conditions to ensure test results can be repeated / Must be controlled and the same repeated reading must be obtained
Interval of calibration depends on:
Warranty of manufacture and specific instruction
Value of appliance and function of appliance
Using of appliance and consequence of incorrect results
Calibration record contain: equipment identity, limit of error and
Calibration interval, last date of calibration, standard used
For the general practice of hacksaws, how many teeth minimum should be placed on top of the material to be cut?
1
2
3
When is a coarse hacksaw blade used?
When cutting material of thin cross section
When cutting material of thick cross section
When cutting ferrous metals only.
What comprises a full set of taps?
A taper, second and plug tap
A taper and plug tap.
A taper and second tap.
Which of the following statement is incorrect?
Never use the adjustable wrench on aircraft maintenance.
Always operate machine with hand gloves to avoid personnel injury.
When reaming a hole, always rotates the reamer clockwise.
When using a reaming, in which direction should it be turned?
Clockwise when cutting and removing
When performing reaming and lapping operations before the final assembly of a joint, it is essential that:
The assembly is held in position by clamps (crimp?)
The fitting of bolts takes place after all holes are prepared
The fitting is true and no misalignment exists.
Half round files have their contours
Tapered in width
Tapered in both width and thickness
Parallel in both width and thickness
Hand file is classified with
Length, grade, cut and material
Length, grade, cut and section
Length, grade, cut, section and material
Carbide Rotary file
Hold by both hands
Slowly and carefully when working at the corner fillet
Work at low RPM or will cause carbide hot and red
Tooth coarseness from most coarse to most fine:
Coarse, bastard, second, smooth
Second, cut, bastard, coarse
Coarse, second cut, bastard
General rule of files:
Large filer, smaller thread
Large filer, larger thread
Smaller filer, larger thread
Using hand file with the normal practice,
When filing soft materials, apply the downward pressure at the forward and backward stroke
When filing soft materials, apply the downward pressure at the forward stroke only
When filing hard materials, apply the downward pressure at the forward and backward stroke
Filing material, which is correct
Hard, forward and aft fast
Soft, forward and fast
Soft, forward and aft slow
Hand file is preserved:
With applying grease on it
With applying lubricant oil on it
With wrapping a wax paper on it (or individual case)
How to store file (normally, the store method is :hang up or store in separate holders)
Hang in a rack
Spread a little oil and hang in a rack
Store in a toolbox with the same category
To file a sharp edge in a groove and keyhole at a corner, use a:
Triangular file
Round file
Mill file
When using a round file
Don’t turn it
Turn every stoke
Turn every 2 strokes
Why use the second cut file
The surface is smoother
To cut more material
When to use double cut
Highspeed filing
Hammer is classified by:
A weight of head without handle
The punch head is crowned because:
The force on the surface is more concentrated
€ mushrooming of the impact surface
€ hammer blow
Centre punch is used to:
Locate hole position
Pin punch 的头部环形物
ň散冲击
Avoid the punch slip and chipping
Pin Punch must be struck with a hard blow, the risk of injury to the hand of an operator. It is minimized by the use of:
A rubber Mallet
A punch holder
Vice-grip pliers attached to the punch shank
Punch is too shaky when hit, should use
Clamp hold punch shank
---
Punch holder
Drill bit extruding 3” is not allowed:
In any speed
When speed exceeding 6000 RPM
Is acceptable provided drill guide is used
Using plier to loosen or tighten nut:
Will damage the components involved
Feeler gauge measuring range:
0.0001” ~ 0.003”
0.001” ~ 0.100”
0.001” ~ 0.060”(pay attention to question)
Feeler gauge define by:
Number
Length
Width
The accuracy of a bevel (vernier) protractor can be read to:
5’
50°
Tolerance of “Vernier Caliper” is
1:100
1:1000
1:10000
The measuring capacity of a vernier caliper is:
The length of the graduated scale
The length of the graduated scale plus the width of the nibs
The length of the graduated scale less the length of the vernier scale
Vernier Caliper check before use
Check physical damage
How to stow a micrometer?
Rotate the spindle until it contacts to the anvil
Give a small gap between the anvil and spindle
Rotate the spindle apart from the anvil
How to prevent the spindle from over-stressing on the workpiece when using micrometer?
Turning the thimble until one ‘click’ is heard
Turning the barrel until three ‘click’ is heard
Turning the ratchet until three ‘click’ is heard
A ratchet wrench is incorporated with a spindle of micrometer type sleeve, what is the function of it?
Preset torque value
Which type of torque wrench gives a ‘break’ when desired torque value is achieved:
Ratchet type (click)
Torsion bar type (small gage &spring mechanism)
Flexible beam type (pointer moves across a indicating scale caused by spring-steel handle)
Before using a micrometer, you should first:
Recalibrates it yourself according to the maintenance manual
Check it for general condition and physical damage
Check the travel for the range of measurement
The correct protection for micrometer:
Wrap with soft cloth and put in general tool box
Wrap in grease paper before putting it in your overall pocket
Use its own case
A dead weight tester is normally used:
To confirm the weight of ballast loads before installing in the aircraft.
To test the functions of hydraulic system valves and pumps.
To calibrate pressure gauges of a specific range.
When measuring the maximum depth of a depression (due to corrosion?):
A dial gauge (DTI) fitted with an adapter block is acceptable
Only depth micrometers should be used
Straight edge and feeler gauge are used.
Measure the taper of a shaft, use
Micrometer measure at the front and the rear
V-block
Shaft measure roundness
The rod placed vertically and measured by DTI
Use DTI and V-block
Measured by vernier calliper
DTI can test?
Surface damage
Round out
Both
Steel drill bit is used for drilling mild steel. The cutting edge angle
118
150
90
When drilling a hard metal such as stainless steel, the included cutting angle of the twist drill tip should be:
90 degrees
118 degrees
150 degrees
How to drill a 3/8in hole?
Drill pilot hole and drill 3/8in hole by higher speed
Drill pilot hole and drill 3/8in hole by slower speed
Bearing on push-pull rod have a hole
Is screwed for to push-pull rod to end
Is unscrewed…
Is a hydraulic lock
After adjusting turnbuckle, the post inspection to be carried out is:
Safety and locking
Check the length of turnbuckle
Security the ------nut
When is a turnbuckle not in safety?
When a small diameter wire can be passed through the inspection hole.
When you can see daylight through the hole.
When a wire of the same diameter as the inspection hole can be passed through
The Question is asking the Control rod safety hole:
Wire with any of diameter can be passed through the safety hole
Wire with any of diameter cannot be passed through the safety hole
The threads on the control rod are visible through the safety hole
To indicate that a rod end bearing is screwed far enough onto the push pull tube rod end:
The inspection hole in the side of the rod end bearing should be clear
The inspection hole in the side of the rod end bearing should be blocked
No more than three threads should show beyond the locknut.
Tension rod turnbuckles are locked by:
Check nut and locking wire
Safety pin and check nut
?
Push-pull rod end is locked by
Check nut and lock wire
Check nut and lock pin
Sleeve 之类
For Push pull rod, when end fitting (bearing) of both end are not aligned, what will happen?
Self-alignment may occur after movement
Difficulties for movement at extreme travel
Wear increases
The control rod with the ball (spherical) bearing is in ….
The bearing can self-align that remove any restriction in travel / auto-align… self-align
The control rod can remove a restriction not to extreme travel
Rapid wear
One reason for disconnection of control rods
Failure of peening
Omitting to put safety washer
Improper adjustment
The ball bearing on the push-pull rod, important check is
Axial load wear check
Radial load wear check
Full free movement
Internal crack in control cable
In fairlead
In pulley
In terminal
Cable is rejected if
Cable is worn 30% of diameter
Corrosion is found inside of cable
One wire is cut
The best way to check control cables for broken wires is to
Examine them visually
Increase the tension and check with a magnifying glass
Run a rag along the cable in both direction
What is swaging?
Wire deformation
Swaged cable fitting should have:
80% of the breaking strength of the cable
90% of the breaking strength of the cable
100% of the breaking strength of the cable
After swaged a cable, the swaged fitting should be checked for
Correct diameter of the swaged shank
Damage of the protective coating
Swaged control cable has:
Screwed at end fitting
Plastic deformation for hollow shank
Masking in swaged shape
Inspect swage cable terminals use
Go-no-go gauge
Wire gauge
Cable swage terminal in service, how to inspect the effectiveness of swage
Witness hole
Painting
Wire loosen at terminal
Inspection hole of crimp connection barrel
Check if a rigid pipe formed kink
Use a ball to test
Bending of rigid pipes is not acceptable if:
Pipes are flattened and not smooth
Sand is not employed during bending
The flattened portion is less than 50%
The minimum bending radius should be largest for pipe specification:
1/2 in diameter for CRES
3/8 in diameter for aluminium
1 in outside diameter for aluminium pipe
The minimum bend radius should be largest for the pipe specification
0.5 inch outside diameter aluminum tube
0.75 inch outside diameter aluminum tube
1 inch outside diameter aluminum tube
Electrical cable from plumbing rigid pipe
Greater than ½ inch
Rigid pipe line should keep away from control cable at least
0.5 inch
0.75 inch
1 inch
Prior to fitting a pipeline, the sealing surfaces of fittings are:
Cleaned of foreign materials
Lubricated with anti-seize
Coated with sealing compound
Bend tube should be filled with:
Fine, dry sand
In the modified filler method of bending pipes, the filler materials is
Fine, dry sand
Special wood inserts
Fusible alloy
Aging cracks in a flexible hose
Render the hose unserviceable
Do not render the hose unserviceable if the first braid is not penetrated
May be disregarded
Which factor will effect rubber (tube) storage?
Humidity of about 75%
Exposure to air in ozone layer
Artificial light
====
Rear insert, front release
Front insert, front release
Rear insert, rear release
About tube bending
At least 75% of the original
When pressure testing flexible hose assemblies, a suitable test pressure if none is specified is:
Working pressure
3x working pressure
1.5x of the working pressure
Routing the electrical cable away from the equipment
Downward
Before the flexible tube installation, we should check
Expiry date and assemble date
Assembles date and cure date
Cure date and expiry date
The standard for rejection a hose is
A blister on the hose
Under high temperature, the golden colour can be seen
When applying lubricants to the coupling threads:
Lubricate inner thread only
Use specific lubricant
Both
Flexible hose kink
It must be rejected
Lay line on flexible hose:
Show twist
Rigid pipe lines must have at least one bend between the fittings to
Reduce (release?) stress caused by vibration *
Allow misalignment (fitting)
Allow movement
A double flare is commonly used on fluid lines made of:
Steel
Copper
Aluminium
When the bearing has 2 parts of inner ring and outer ring is installed:
The inner ring can be removed from its housing for inspection
The outer ring can be removed from its inner shaft for cleaning
Neither of the practices are allowed.
Anti-friction bearing sharply roughness:
Overload
Bearing brinelling is caused by:
Impact load
Anti-friction bearings suffering from spalling would exhibit a sharply roughened or peeling bearing surfaces due to
Over heating
Over loading
Corrosion
Magnetic bearing use in anti-friction bearing is undesirable because
Increase friction and resists rotation
Attract the ferrous particle
Damage the lubrication
The most failure of bearing is
Over speed
Lack of lubrication
Overload
During bearing maintenance, which one is correct:
It is necessary to lubricate the shaft and bearing rings
Foreign particle (FOD) in anti-friction bearing can cause what kind of damage?
Abrasive and score
Chaffing and galling
Groove and spalling
Which is NOT a check item for bearing defect:
Score and crack
Wear and corrosion
Weight and discolouration
Tufnol bearing bearings used in various systems, are normally:
Lightly lubricated
Not lubricated.
Pre-packed.
Foreign particle ingress bearing, how to check
Oscillates and rotates slowly
Rotate in an operational speed
Use ultra-sonic check
Bearing becoming magnetic, the reason is
High speed
Unsuitable lubrication / not enough lubrication
Overload
After water cleaning, you cannot use compressed air to clean anti-friction bearing. Why?
Will be contamination
Moisture in air can enter the bearing
Can spin when unlubricated cause wear
For turbine bearing, how to properly oil without too much oil
Gravity drip feed method
Spray nozzle / Calibrated nozzle/jet
Bath and immerse
Internal dirt in a roller bearing may be cleaned by:
Using copper wire brush
Blow with dry compressed air
Soak in white spirit and spin the inner and outer races in opposite direction.
How to clean bearing, what agent
White spirit
Use air to blow
Soap water solution
Water contamination in grease lubricated bearing will cause:
Freezing and corrosion
Among the riveting work described below, which is considered acceptable?
Cracks in the inner area of the head, corresponding to the shank diameter
Intersecting cracks on the surface of the rivet head
Superficial crack around the periphery of the rivet head
Why do you need to check rivet immediately after installation?
To check the rivet conformity with the hole size and position
To see if other treatment is needed
Blind rivet is not allowed to be used on certain areas such as
Window and door
Wheel door / Under carriage
Wing attachment
Which rivet needs heat treatment before use?
2024
Hi-shear rivet by what tools for install
Pneumatic squeecing tool
Hammer and bucking bar
Special (hi shear) tool
Bucking bar weight
2-3 pound
3-4 pound
4-5 pound
If hole elongated, the rivet should be check for
Score, abrasion
Crack
Shear, distorted
Rivet is installed completely in tubular section, the head will be formed:
Small manufactured head
Flat manufactured head
Manufactured head shaped to round contour
Temperature to keep aluminium rivet soft:
0 deg C
Solid rivet completely pass the tubular component, the shear load
Universal head (Normal head?)
A small head
Shape with the tube
Which method we use to install rivet on the fuselage
Parallel strongest beam
Install in the circle direction is better than in the square direction
Use the hole as fast as possible
Inspect the riveted structure for:
Conformity of repairing scheme and riveting method
Install big diameter rivet, the pneumatic gun should be set to
Long, fast stroke
Long, slow stroke
Short, slow stroke
Rivet in hard material:
Long and slow stroke
What happen if rivet hole is too large?
The rivet shank expends to form a bulged skin *
Incorrect shop head size / The second head is not up to size
Rivet installed diagonally
How to remove a rivet,
Use a drill with one size smaller than the rivet head
Use a drill with one size larger than the rivet shank
Use a drill with one size smaller than the rivet shank
After a countersink rivet is driven to aircraft skin, it is common to have excess rivet material projecting above the surface of skin. How to flush it?
Use a file
Use a small rotary mill
Use a microshaver
Riveting on dissimilar metal:
The metal surface being anodic treatment
Applying separator in between
Not free moving over the sprocket
Minimum spacing for riveted joints:
Double chain 4D
Rivet pitch is the:
Distance between the centers of adjacent rivets in the same row.
Distance between the centers of the rivet to the edge of the repair.
Clearance between rivet and hole diameter
Pitch of rivets depend on:
Rivet diameter
Rivet material
D = Rivet diameter, what are rivet pitch and land for double chain?
2D and 3D
3D and 3D
4D and 2D
When inspecting a driven solid shank rivet, the formed head should have a height of:
1D and width of 2D
1.5D and a width of 1.5D
0.5D and a width of 1.5D
The minimum pitch between staggered rivets should be:
2 ¼ D
Rivet shank thickness after should be:
0.5D
Which of the following need not be considered when determining minimum rivet spacing?
Rivet length
Rivet diameter
Type of material being riveted.
When bending sheet metal:
Setback with K value and thickness
Bend allowance with K value and bend radius
Leg length with K value and bend radius
A piece of sheet metal is bent to a certain radius. The curvature of the bend is referred to as the:
Bend line
Bend radius
Bend allowance
Bend radius is defined as:
The radius from the inside of the bend
The radius from the neutral axis
The radius from the neutral axis plus the half of the thickness of metal used for the bend
To bend a 90° angle on a sheet metal, what charts can be used for calculating the setback?
X factor
K value
B value
A bend but not 90 deg bend using:
K value
Setback of a 90° bend angle can be found by
Multiplying the Radius and Thickness
Multiplying the K value, Radius and Thickness
Bending sheet metal the reference line is
Neutral line
The bend tangent line
Mould point
When bending, which has to be considered? (i) Thickness (ii) Machine clearance (iii) Material
(i)
(i) and (ii)
(i), (ii), and (iii)
Bending radius depends on
Material and angle
Angle and thickness
Thickness and material
When marking out a pattern on aluminium alloy sheet metal, it is preferable that bends be located:
Across the grain
Diagonal to the grain
Parallel to the grain
After bending a sheet metal, crack would be likely prevented
Heat the sheet metal
Drill cargo holes at the corner of metal / Drill a large diameter hole at the corner of the bend
Joggle of angle is used for:
Clearance and extension
Joggle joint:
Provides clearance
Provides compression
Crimp and shrink out
A structure hole is flanged to:
Provide rigidity to the structure
Increase corrosion resistance
Reduce aircraft weight
Structure hole (lightning holes) on aircraft are used to:
Provide rigidity to the structure
Increase corrosion resistance
Reduce aircraft weight
For sheet metal patch repair:
Straight seams parallel to the original are used
Circular patch is better than rectangular one due to the stress concentration
New holes should be used as far as possible
For the section repair,
Splice member should be tapper to reduce the stress
The repair part is making in sheet metal shop
The filler is the same material
Which is the correct statement about sheet metal repair?
Tapered splice is used to prevent stress concentration
All repair comes from sheet metal work
Patch sheet must be one size thicker than original metal
What will happen when bow exceed limits
Seriously affect the stress concentration
Lowers aerodynamic performance
Corrosion
When jointing compound is used,
Ensure that the joint is tightened whilst the compounds are still wet
Ensure that the compound are semi-dry before application
Ensure consistent results from occasional use are often supplied in squeeze-tubes
Metal after annealed, riveting will not affect structural strength within:
10 mins
30 mins
60 mins
Minimum limit for transparent panel:
0.1 inch
0.01 inch
0.001 inch(一般 1-5 刀)
Warping skin may spring back to original profile:
Cracks on the panel.
Loose rivets of the supporting structure
Longitudinal ripple on the panel
Crazing on parts undergoing tension and compression are on:
Surface withstanding tension load
Surface withstanding compression load
Both sides
Best method to remove metal coating?
Chemical stripper
Mechanical removal
Immerse in acid solvent
Steel is galvanized by:
Spraying heated tin onto the surface than rolling it smooth through a series of rollers
Passing it through vats of molten zinc then rolling it smooth through a series of rollers
Heating it in a box that contains a high concentration of zinc chloride in the furnace atmosphere.
Fatigue is caused by:
Repeated overload
Repeated load
Fatigue is due to stress applied:
Exceed the enduration limit too many times
Exceed the enduration limit too often in the specified timeframe
Too often in the specified timeframe
With respect to visual inspection, metal fatigue:
Has the same chance of detection in early and late stages of development
Is revealed by the formation of small hairline crack
Is not easily detected; NDT methods must be used.
Blend out corrosion pit:
Elliptically shape
The length of cleaned area is 10 times of corrosion depth
Stepped circle
Removed the corrosion of the non-plated steel
Abrasive blasting using AL2O3 or glass bead
Prunus blasting using nutshell and organic
Vapor blasting using mid acid solution
Abrasive blasting uses:
Steel and lead shot
Diamond sand
Aluminium oxide and glass brush
Remove corrosion from steel:
Immerse in acid
If no manual/procedure for a corrosion control to follow,
No need for corrosion control program
Operator should raise a corrosion control program themselves
Maintenance company must do corrosion inspection themselves when do the routine work / The corrosion control can be incorporated in general inspection procedure.
Corrosion control and rectification procedure can be found in:
Overhaul Manual
Structural Repair Manual
Illustrated Parts Catalogue
In corrosion control, the purpose of recording the period and location of corrosion is to:
Monitor existing corrosion, inspect known corrosion prone areas.
Find areas of new corrosion and monitor existing corrosion
Find areas of new corrosion and inspect corrosion prone areas
CPCP
Corrosion prevent and control program
Damage assessment is carried out when:
Remove skin
Complete remove corrosion
Nothing removed
After removing corrosion products
Damage assessment is carried out
Damage assessment is carried out together with rectification
What should be done after removal of corrosion?
Assessment must be made
Surface treatment
Remove the corrosion on magnesium use
Steel wire brush
Bristle brush
Oxidized aluminium
How to detect damage between metallic and non-metallic parts?
Eddy current
Magnetic particle
Ultrasonic wave
What is used for finding the near surface crack?
Eddy current testing
NDT, if false indication found in the specimen:
The whole process should be repeated since the true may mask the false indication
In penetrate test, if false indication is found
Test piece should be rechecked because …
Test piece need not be rechecked
Test piece need not be rechecked provided no more true indication is found and cause for false indication is sought
The present of possible tight crack in the seat’s area of cabin can be inspected
Fluorescent penetration
Dye penetration
Eddy current
(Tyre) bead seat area check by
Eddy current
Dye penetration
MPI
Testing the transmission of steel
Measure wear and by fluorescent penetration
By fluorescent penetration and by magnetic flux technique
Measure wear and by magnetic flux technique / Measure the wear and inspect by magnetic particle inspection technique
Testing transmission component of steel disassembly
Measure wear and NDT inspection use of fluorescent penetrate
Fluorescent penetrate and eddy current
Measure wear and NDT inspection use of eddy current (magnetic particle inspection?)
To inspect tight crack in _____ bearing in ____ aluminium alloy, use:
Eddy current
Fluorescent penetration inspection
Colour inspection
For liquid penetrant inspection to be effective, the surface must be completely free of grease, oil and dirt. The best method for cleaning a surface is:
Vapour degreasing or solvent scrubbing
Solvent scrub followed by wire brushing
Vapour degreasing followed by a light abrasive blasting
Fluorescent penetrate
Fluorescent white light
Ultra-violet light
Infrared
What is the color of fluorescent test?
Red
Greenish yellow
Shiny silver
Increasing the frequency when carry out an eddy current test, the detect depth will (haeco book P579)
Decrease
Increase
Not change
Increasing frequency of eddy current:
Increases penetration
Skin will be effected
Increases sensitivity
€Through transmission’ method is used in the ultrasonic testing of a test piece. A defect is indicated as:
A decrease of magnitude of the second pulse on the CRT screen (Second pulse amplitude less than first pulse)
An increase of magnitude of the second pulse on the CRT screen
One more pulse appear before the second pulse on the CRT screen
Use AC in ultrasonic, the material has _____________ characteristic:
Pizo-electric
Magnetic particle test is obviously indicated:
Parallel with the magnet flux line
Perpendicular with the magnetic flux line
Inclined with an angle
Fault detected by magnetic particle method, the flux line should be
Parallel to the fault
At right angle to the fault
At 45° to the fault
After MPI, component must be:
Current continuity check
Demagnetized
During engine boroscope inspection, we isolate the engine system because:
May damage boroscope and engine components
To make inspection more accurate
May cause injury to operator
Cold joint is term for
Soldering
Brazing
Welding
Good soldering has:
Shiny surface
Dull surface
Solder form consists of
Stick with flux and wire with flux
Stick required separate flux and wire with flux core
Stick required separate flux and wire required separate flux
Common solder material
Tin, Lead, antimony
Tin, Lead, Resin
Tin, Lead
Soft soldering not using due to
Less mechanical strength
General purpose solders are graded by:
A colour coding
A letter coding
A numerical coding
Soft soldering temperature
200 deg C
Soft solder begins to melt at:
400-550 deg C
155-315 deg C
120-155 deg C
Silver solder is another type of solder, the reason is
A melt point is low
Too much soldering:
Weak join
Coaxial cable not applying soldering because
Cable end hardly to fill into the terminal
Aircraft aluminum cable never soldered to prevent fraying because:
Solder is hard to fit on the terminal
Increase the tendency of the cable to pull out of the terminal
Solder may increase the possibility of corrosion
When soldering wiring looms or cables:
Disconnect the aircraft battery
When soldering, rosin is used to:
Remove oxides and improve wettability
What is ‘Brazing’?
Hard soldering
Brazing strength depends on
Overlap area of surface
Material
The thickness of film
About brazing, which is correct
Melt part base metal
Use non-magnetic filler (non-ferrous)
Low melting point 200℃
The function of flux in brazing:
Ensure surface chemical clean
Flow better, wetting the base material *
Prevent oxidation
What is ‘killed spirits’?
Zinc chloride
Oxy-acetylene torch for brazing
A neutral flame should be used
A Carburizing flame is:
Has excessive oxygen
Has a furry edge inner flame
Is used with copper-zinc type of filler alloys
Silver brazing
Higher mechanical strength
Neutral flame
What is ‘cold’ welding?
High pressure+no heat
---
Soldering
Which of the following is not a welding fault?
Fatigue crack
Undercut
Porosity
The most common method of inspecting a weld is:
Visual
Magnetic Particle
Radiography
Guards fitted to a pulley should:
Not be free to rotate about the pulley
Be free to rotate about the pulley
Be lubricated
Which is NOT a good reason to reject a chain
Guide jam with chain
Chain can be easily lift off the sprocket
Not free moving over the sprocket
Quill driver has waisted position in its arm length
Provide clearance for spline
When a chain is taken to the shop for overhaul, the primary check is
General condition and corrosion
Elongation and twist
Smooth operation
When a flying aircraft control incorporates a non-reversible chains assembly:
The control can only be moved in one direction.
The chain can only be fitted around the sprockets in the correct manner.
Air loads on the control surfaces are not transmitted to the pilot’s control.
Proof loading test of a cable
60% of the min breaking load
How to know whether a spring encounters "torsion relax" or "metal set"
Measure the force to “coil bind” and compare with relevant chart.
Measure the distance from “free length” to “coil bind” and compare with relevant chart.
Test the square and free length
Coil binding of spring is due to:
Tension
Compression
Torsion
How to check spring such as circlip or spring washer?
By spring load tester
Send to workshop
By hand pressure
Spring check
Distortion and load check
Wear and …
Distortion and wear
Spring is classified according to:
Compression, tension, and torsion
Size
Material
Spring in safety devices subject to:
Static loads or small deflections
Normal frequency of deflections
Rapid deflections over long periods of time
With respect to the inspection of springs, they are generally rejected for:
Signs of distortion and plastic elongation
Improper installation and attachment
A size too long or too short
The conductor of a crimped joint should protrude from the end of the connector by at most:
1/16”
1/8”
1/4”
An aluminum conductor should use.
Aluminum lug
Gold plate lug
After electrical wire insulation is removed (wire is stripped), what should be done before crimping?
Carefully twist the wire strands in the nature lay
Tightly twist the wire strands in the original direction
Unravel the strands to reduce the resistance
The recommend minimum distance between two in line crimps is
6 inches
2 feet
10 feet
How to inspect for a red type crimped terminal?
Single dot mark for correct crimpling die used.
Sufficient pressure is ensured in crimping:
By the ratchet mechanism
Crimping should be
Both Operated in full cycle & Correct depth obtained by using contact locator
How to inspect the correct crimping of a connector?
The conductor should be visible at the shoulder of the contact but it cannot exceed 1/16 inch
Successful crimping:
Saw wire in inspection hole
Enough insulation is crimped
Into connector front release
During inspection of the crimped blue terminal, one impressed dot is found on the pre-insulated terminal. This indicate
The terminal is properly crimped
Wrong crimping tool is used
Crimping is used
Which situation should the wire be rejected (crimping)
Dot color dose not match
Serious crimping defect is:
Wire strands broken or cut
Insulation is broken
Crimp tool broken
The critical factor for inspect crimp terminal
Position of insulation in terminal
Depth of crimp
Length of stripper cable
Oxidation of aluminium cable:
Can prevent corrosion
Increases electrical resistance
Increases (forgot, but this is a good thing and oxidation is a bad thing)
Operation principle of the “Ratiometer”
Ratio of deflection coil and control coil *
4-1/2 standard for
Reach 4999
Reach 19999
Reach half scale
For a (3-1/2) digit DMM
Can display up to 9995V
Reading up to 1999V
Has a half digit in far right
Why digital multimeter is considered more accurate than the analogue meter?
Numeric display
Less human interpretation
Use a moving coil multimeter to measure a AC square wave, the reading
Under read
Over read
Normal
Ohmmeter, the two test pod mischange, which happen/ if two pods of ohmmeter are reversed, what will happen?
Full scale
Normal reading
Zero
The Question is asking the principle of ohmmeter using a D’Arsonval type of movement is:
Proportional to current flowing through its moving coil
Proportional to current flowing through its fixed magnet coil
Inversely proportional to the induced magnetic field strength
Before using an analog Ohmmeter:
Find out the portion on the scales
Check zero and infinite resistance
Which meter is not linear scale reading?
Ammeter
Voltmeter
Ohmmeter
Applications of inductive pickup meter are found in:
AC ammeter, wattmeter
AC and DC ammeter
AC ammeter and AC voltmeter
Add multiplier resistance in a Voltmeter:
Connected in parallel with the moving coil.
To extend the range of measurement
Small when compared with the coil resistance.
Clamp-on ammeter used:
Don’t have to disconnect circuit
Can be used in areas that are restricted/hard to reach
Higher accuracy
To extend the measuring range, ammeter are connected:
In parallel with a shunt resistor
Shunt in Ampere meter:
Extend the measuring range and increase meter resistance
Extend the measuring range and reduce meter resistance
Shorten the measuring range and increase meter resistance
Full deflection in Megger:
Control coil open
In Megger test, when the test resistance is short, the pointer
Point to zero
Fully deviation
Initial deviation
When checking Megger by shorting two prongs, we will get:
Full deflection
Zero deflection
The deflection of pointer in a Megger is proportional to:
The ratio between currents in control coil and deflection coil
The internal voltage supply
The tension of hairspring
Megger deflection is affected by
Tension of spring hair
Megger voltage for aircraft is
100V
250V
1000V
Zero adjustment of a coil moving measuring instrument is done by
By offsetting the hairspring on control coil
Adjust the variable resistor in series with the coil
When stripping wire of insulation, what is acceptable?
None nicked or broken
2 nicked, none broken
2 nicked, 2 broken
Cables routing away from equipment should be:
Upwards
Downwards
Horizontal
What safety hazard is present when using mains-electrical power supply?
Water provides conducting path which increases current drawing capacity and may burn fuse
Should not stand on wet surface because water provides conducting path to ground
When a light hand pressure is applied to electrical wiring, the minimum separation between the wiring and moveable controls is:
Half an inch
One inch
An eighth of an inch
Replacement of external battery of the external battery cart, the most important caution when replacing the battery is:
The replacement match the physical dimension
Connect at the correct polarity
Check the amphere hour rating
When connect ground external power to aircraft,
Remove all aircraft electrical power supply
Run GPU, switch on and then connect external plug to the aircraft
Connect the external plug/socket, ensuring that the plug is fully mated in the socket, switch on the external power supply
Electrical power connection
Run GPU, switch on and then connect external plug to the aircraft
Check that the external supply and the aircraft battery master switch are off and connect the external supply, ensuring that the plug is fully home in the socket
Check that parameters, voltage and frequency
ADF uses which frequency?
LF
When finding difficulty fitting a miniature plug into the receptacle:
Use force to install
Add an approved lubricant to the engaging threads
Check for the reason and renew as necessary if they do not mate.
When carrying a simple continuity test (using lamp), the electrical circuit
Power on
Power off
Grounding
When you check unknown voltage,
Set the highest available to start and then adjust downward
Set the lowest available to start and then adjust upward
Avoid electric shock
Which is the correct statement about a heat shrinkable sleeve for aluminium wire terminal?
Make sure that a heat gun is not explosion
Sleeve does not overlap the terminal
Sleeve must be tight to the wire
A cable loom should be protected by conduit when feed through
Cargo ceiling
Main equipment center
Wheel well door
An in-line splice should be positioned
Outer surface of the loom for easy inspection
Outside of the loom
Terminal of the loom
Splice should
Staggered
The min separation between two in-line is 12inch
To prevent electrical interference
Twisting cable and protecting cable
Screening cable and protecting cable
Screening cable and twisting cable
Regard electrical cables, gauge number:
0 is the largest
Wires are twisted in order to
Reduce resistance
Reduce interference
Gain support
The maximum permissible mill-volt drop across a connection that is being treated for high resistance is:
5 mV/10A
50mV/10A
500mV/10A
With millivolt drop test
Tongue and structure
Tongue and barrel
Barrel and structure
When testing for primary bonding connections, you look for resistance values:
Between 0.5 ohm to 1.5ohm
Declared by the manufacturer or not more than 0.05 ohm
0.5 ohms or 100.000 ohms/sq. ft. Whichever is less
What is the order of electrical circuit checks carried out on aircraft?
Insulation, continuity, bonding
Bonding, continuity, insulation
Continuity, insulation, bonding
When the two prongs of the double prong probe of the bonding tester are momentary shorted.
Control coil and battery are tested
Deflection coil and battery are tested
When the resistance of the 60 feet probe of the bonding tester is changed. The current flow is changed
Control coil
Deflection coil
Control and deflection coils.
A bonding tester have:
Have a driven dc generator
A select switch range
A 6 feet long and a 60 feet long cable
Bonding is good for:
Reduce radio interference
Prevent different charges from building up
The most common failure on bounding jumper is
Mechanical loose connection
Corrosion
Most common bonding failure occurring in the electrical circuit
Corrosion
Mechanical failure at the bonding connection
To achieve best bonding, what should be done
Remove paint and anodizing
Coaxial cable should not bend
Greater than 6 times of its diameter
What is the minimum diameter when cable is stored?
100 times
50 times
30 times
The minimize radio frequency interference, coaxial cable installation runs should be:
Installed with an in-line capacitor
Looped in bundles to create a magnetic field
Kept as short as possible
Coaxial cable cannot do
Conduit and screen
Interval 24in
Repair damage on any segment
When coaxial cable is clamped too tight, what will happen?
Cross section area decrease
Magnetic field interference increases
Metal clamps with the coaxial cable, what problem will happen?
Alter the cross section
Prevent the expand and contraction of the axial
Can make the interference of the single
How to repair a damaged coaxial cable?
Remove the cable from the fitting and install the same part number
Which is correct about a connector of aluminium sheath coaxial cable?
Hold the connector body against the end of the cable
Turn the connector body rather than the nut
No O-ring
When preparing and cutting a coaxial cable for connection:
The cut must be at 1inch from the end of the outer connector
The cut must be controlled within a tolerance zone of 1/16" from the nominal size
The cut must be less than 1/2” from the end of the outer diameter.
Pulling coaxial cable with the correct clamp:
Not to move
Move with resistance
Move free
Signs of lighting strike:
Burning and pitting in sub surface
Disintegration of non-metallic parts in cabin
Stiff bearings and control surfaces
Lightning strike on aircraft:
Appears as burning and discolouration
Appears as extremely large hole in leading edge
Are found at trailing edge of the wing
Defects from lightning strike:
Static discharge and hydraulic leakage
Burning and pitting
The typical evidence of lighting strike is:
Streak burn mark on the wing
-
Burn hole in center of the aircraft structure
Lightning strike:
Blistering
Crazing
Sagging
Which area of the aircraft will be attacked by lightning?
The extremity of the aircraft
Lightning damage usually occurs at the entry of the striking are+It can also detected by
Exit (point) of the lightning
Lightning strike is diminished by:
Static discharges
Bonding non- metallic structure to the main structure
Lightning strike of an aircraft can be viewed as:
High voltage trapped in the aircraft
Sign of lightning strike
Sign of electrical discharge
Lightning is easy to form what damage?
Strike damage+static discharge damage
Bonding for lightning strike discharge are classified as:
Primary bonding
Secondary bonding
Tertiary bonding
Lightning exit static discharge mark may be found at
Wing tips, leading edges of wings and tail unit, and fuselage nose
Wing tips, trailing edges and antenna
Wing tips, external fuel tanks and nose cones
After lightning strike to an aircraft, what should be done first?
Functional check of flight control surface and avionic systems
After lightning strike, which is the primary check for flight control?
Bearing cease
Bonding wire
Control cable
Operational check of the flight control surfaces is recommended after a lightning strike incident to inspect for:
Cable breakage
Bonding stripe disintegration
Bearing seizure
Secondary inspection after lightning strike
Magnetic compass
Flap surface
Engine Inlet
When engine cowling are lightening, the further check
Filter and chips (MCD)…
Refueling, ORDER of grounding connections:
Fuel truck to ground; fuel nozzle to aircraft; fuel truck to aircraft
Fuel nozzle to aircraft; fuel truck to aircraft; fuel truck to ground;
Fuel truck to ground; fuel truck to aircraft; fuel nozzle to aircraft
When refueling and defueling a large transport aircraft:
Radio or radar equipment must not be operated.
Radio or radar equipment maybe operated provided the aircraft has been properly earthed.
All aircraft electrical power supplies must be closed down.
High flying jet aircraft are often equipped with a temperature sensor in one of the outboard fuel tanks for the purpose of ensuring:
Fuel expansion caused by excessive fuel temperature does not lead to overboard venting of fuel.
That the flight crew are aware of any danger of dissolved water precipitating out as free water, freezing, and subsequently blocking fuel filters
That flight crew can monitor fuel freezing which could lead to blocked filters.
The symbol of fuel line:
Red
What fuel colour is blue (100LL)?
Jet A1
Avgas 100 (low lead)
Most common contamination in aircraft fuel:
Dust
Oil
Water
To prevent contamination:
Blank all openings (eg. Static vents) and plug
Frost on control surface will?
Decrease lift
Increase weight of aircraft skin
To remove ice and snow deposit in cold weather, which of following is considered bad practice?
Remove deep wet snow with a brush or squeegee.
Blow out light dry snow in sub-zero temperature with hot air.
Remove heavy ice by spraying de-icing fluid
An anti-icing fluid applied prior to an aircraft taxiing from the ramp is expected to prevent ice forming until:
The airflow in flight blows it off the wings
Cruise altitude is reached
Take off
Hot-spray of de-icing fluid:
Fluid is applied with 95’C
It is used in severe snow or ice conditions
Cannot be used in –7’C or lower temperature
Before towing aircraft with engines removed, which precaution should be observed?
Install ballast
Check lateral balance
Ensure sufficient weight on nose wheel
Before stopping, an aircraft should be towed in a straight line for a short distance in order to
Remove any tyre stresses imposed by turning
Equalize pressure on nose steering system
During towing the aircraft steering system should be:
Activated
De-activated
Activated but not be used
Before towing is commenced, nose wheel steering:
Should be disconnected or disabled
Locked
Towing backward and turning:
Release tire pressure
Aircraft marshaling signals, marshaller spread their arms, crossing and uncrossing their arms means
Operate an emergency stop
Operate a normal stop
The towing speed must slow down
Tow light aircraft on soft ground
Same as the manufacturer towbar on nose gear
Tri-loop(三角形拖)
Push from the rearward
Picking light aircraft use
Cable or nylon rope
Fiber
Steel chain
Towing bar, shearing pin/bolt
Prevent over shear on main gear
When inflating a tyre, a person can be prevented from damage by:
Inflating the tire placed inside a safety cage *
Which is NOT a correct maintenance practice inside hangar?
Wear cotton overall working in the fuel tank
Starts and run APU
Fighting with fire caused by titanium firewall
The most suitable place to store a complete aircraft is:
In a cool dry hangar
In the open air provided it was fully covered.
In the open air with tyres, cockpit and engine covers fitted.
To prevent damage, light aircraft in strong wind should be parked:
Head to the wind
Tail to the wind
Side to the wind
Large aircraft in ramp for transit check
Wind direction and provision
Parking brake and chock
Set up the flight control lock in the cockpit
Red light flash from the tower in order to
Towing away from the runway / Taxi clear of the runway in use
Stop
Return to original position
A flashing white light signal from the control tower to a taxiing aircraft is an indication to
Stop
Proceed with extraneous caution
Return to starting point on airport
Taxing in control airfield (talking about the sequence)
To the ground control for clearance and slowly move
Move the aircraft slow and then ground control
When is it allowed to approach the aircraft when it is on ground running?
After obtain clearance of the towers *
After obtain clearance of the ramp controller
After .. Communicate with the pilot
Evidence of heavy turbulence:
Ripple upper skin
Damage common to heavy landing and tire burst are related to:
Brake units and associated hydraulic leaks
Flying controls for freedom of movement
Rear-mounted engines for ingestion of debris
Hydraulic fluid leaks and brakes crack may be found after
Heavy landing
High energy stop
Severe turbulence
After a heavy landing, which part of the wing might be wrinkled?
Upper surface of the wing / Upper skin of wing
Down surface of the wing / Lower skin of wing
Wing tip
After a hard landing, check:
Landing gear and attachment, wing, engine mount
The areas of a gear most likely to crack during use are:
Mounting boss and around lightening holes
Gear teeth and keyways
Gear teeth and mounting boss.
When aircraft jacking the airplane, disconnect the system:
Flight mode
Landing gear extraction and extension system
Before jacking an aircraft up for retraction test:
Arms the rudder pedal steering system
Disarms cargo handling power.
Trip air ground safety circuit breaker
Before jacking the aircraft to test landing gear retraction:
Air/ground mode system
System affected by air/ground mode
Where can you find the max weight for aircraft jacking?
Operation manual
On the metal plate next to door
MM
When jacking aircraft, what should do first
Calibration
Tare to zero
Check if equipment exceed allowable limits
Jack capacity:
Aircraft weight, size
When the aircraft is Jacking, the brake should be
Release
Set
First set and then release
The minimum crew to accomplish aircraft jacking at three points are
Five people
Four people
Three people
Plumb bob with grid plate is for
A levelling adjustment of lateral and longitudinal axes
To add a load on the empennage
Lateral unbanlance
Centre of gravity after
Moment increase when CG moves backward:
Levelling / tank lateral axis
After re-weighing an aircraft, it is normally required to amend the:
Basic weight
Maximum total weight authorized
The Basic weight and the maximum total weight authorized
Inconsumable fluid such as hydraulic fluid is considered as:
Basic Weight
Useable fuel refers to:
Variable load
The useful load of an aircraft consists of the:
Crew, usable fuel, passengers, and cargo
Crew, usable fuel, oil and fixed equipment
Crew, passengers, usable fuel, oil, cargo, and fixed equipment.
What things should be put in weight record?
Unusable load
Equipment and load deposition
Renew equipment
What weight information should be considered when weighing aircraft?
Variable load
Disposable and usable load
The Weighing Record is part of the:
Weight and Centre-of-Gravity schedule
Weight and Balance schedule
Weight and Balance report
What change is not reflected in the weight schedule?
Configuration
CG related to the centre of pressure
Which of the following data is not on the weight and balance record
Relationship of datum points to center of pressure
A change of configuration
Basic equipment list
Before weighing an aircraft, it is required to:
Calibrate the weighing equipment
Check the zero and indication
Check the maximum indication
When Basic Weight is changed, where should this information be included?
Weight and Centre-of-Gravity schedule
Weight and Balance schedule
Weight and Balance record
Which is correct?
Net weight = Scale weight - Tare weight
Net Weight = Scale weight + Tare weight
Scale Weight = Net weight - Tare weight
Centre of gravity is at 52% of MAC (mean aerodynamic chord), what tendency must be taken to neutralize it
Remove load forward
Remove load from aft / Tail heavy
Distance between main wheel to the tail wheel is 100"; XX datum is 10" behind the main wheel; Reading on main wheel is 450lbs; Reading on the tail wheel is 100lbs. Where is the CG?
Eleven rear from the main wheel
Eleven rear from the XX datum
€…………………………………
A tricycle undercarriage aircraft reweigh has a nose wheel weight of 2322lbs 83.5in aft of datum, and a combined main wheels weight of 3540lbs at 195.5in aft of datum. The C of G would be:
97.63in aft of datum
33.07in aft of datum
151.1in aft of datum
Typical Symmetric check:
Measuring from reference points on the longitudinal axis to the control surfaces
Use plumb to level the aircraft
Assembling aircraft, symmetry check:
Measure distance from point of rudder to stabilizer
In hangar the symmetry measurement is
Find the distance from the axial datum (center line) to the flight control surface
Level the a/c with lamb plumb
Before weighting and balancing a/c, details on equipment configuration and … should be shown on:
Certificate of Airworthiness
Type certificate data sheet
Type certificate
Aircraft with MTWA > 5700 Kg should be weighed at intervals not exceeding:
4 years
5 years
6 years
Weight added to the tail of the aircraft after a repair will cause the moment in the calculation of the "+g". Position in the longitudinal axis to:
Increase
Decrease
Increase only if the weight is above the "+g".
Extra weight added to horizontal stabilizer due to repair patch:
Increase the CG position referring the datum
Decrease the CG position referring the datum
Depends on whether the weight is added above the datum surface or under it
For CG calculation
Rear of datum is positive
Before datum is positive
For fixed plane, always at nose
The centre of gravity position of an aeroplane lies outside its design optimum range will cause:
Increase in fuel consumption
Decrease in control capability / A general reduction in performance
All of the above
Most important thing to know when checking aircraft weight and balance:
Center of pressure
Original center of gravity
Aircraft datum line
When a new patch hardware with same P/N come to the store, which statement below is correct:
Store the new hardware and old hardware together as they have the same P/N number
We should store them separately from the others even they are of the same part number
Store them according to manufacturer s instruction
When receiving goods from a store, you always check:
GRN, P/N, S/N, Approval stamp
Attach Serviceable/Unserviceable label
Part number, received date
Removing component from aircraft
Fill in the Unserviceable label and tag it to the component
Sign the Authorized Released Certificate and tag it to the component
Sign the authorized Released to service and tag it to the component
After removal of life-limited parts, you should:
Mutilate it in a way to avoid re-use
Send back to manufacturer
Put in store and wait for manufacturer to extend the limit
If an aircraft is fitted with a left-hand and a right-hand part, they typically have the same part number except that:
The left-hand part number is followed by –LH, while the right-hand part number is followed by –RH.
The left-hand part number is followed by –A, while the right-hand part number is followed by –B.
The left-hand part number is followed by -1, while the right-hand part number is followed by -2.
Replace seal by:
Part number correct provide by manufacturer
Where is inflammable fluid stored?
Cupboard inside of workshop
Outside of workshop
Anywhere unless direct sunlight
Where is the effective number in the MM?
Lower left
---
Can find at the top
Maintenance schedule is prepared by:
Operator
CAD
Maintenance organization
Maintenance schedule:
Is part of the MM
Is revised by maintenance organization and meets the airline needs
Shows interval maintenance review
Maintenance schedule belongs to
Aircraft maintenance manual
The file given to maintenance operator by air-line
Maintenance Schedule
From maintenance manual
By maintenance organization to suit an airline
Maintenance review
Which is assigned a wire number of the wiring diagram manual?
ATA specification 104
Part number and wire number are written in diagram by alphanumeric
Physical location of wire is shown to minimise the fine to locate the wire
Which of the following information would normally be found on an electrical wiring diagram?
Wire code number
Current carrying capacity of the wire.
Insulation details of the above.
To verify the maintenance, engineer signature applies to:
Carries out maintenance work and any specific requirement
Described in maintenance card only
Only maintenance work carried out in described in maintenance card
What should the engineer(CAD) sign for CRS? (normally, the sign include: signature, stamp, and the date, the answer B is not strict)
Sign the name & document of
Sign the name & authorized No
Sign the name & birth
CRS requires what?
Certifier signature, full name
Which of following need CRS
Any hangar maintenance task
After overhaul, repair, modification or mandatory inspection
Define alert level:
An indicator which when exceeded indicates that there has been an apparent deterioration and appropriate action has to be taken
The hard time is:
Items that are proven to last a definite time
Items that are proven to last an indefinite time
Items that are proven to last forever
Hard time is
Where the failure of the item has a direct adverse effect on airworthiness and where evidence indicates that the item is subject to wear or deterioration
Where a failure of an item does not have a direct adverse effect on operating safety
Structural Survey Inspection of aircraft is call for by the:
Manufacturer
Operator
Engineer
Structural Survey Inspection usually carry out on:
High cycle aircraft
Low cycle aircraft
Aircraft under production in manufacturer *
Technical information for modification appears in the:
Technical information letter
Product service bulletin
___ standard order
MOR can report by
Only by certification engineer
Senior management
Can not be return back
General instruments and multi-purpose display devices are classified as:
ATA Chapters 31, 45
ATA Chapters 33, 49
ATA Chapters 31, 38
How many sets of number are there in ATA specification 100?
Two
Three
Six
When a major structural repair is not carried out in accordance with the structural repair manual, the repair must be approved by:
A licensed aircraft maintenance engineer.
The aircraft operator.
The airworthiness authority.
Aeronautical Engineering Drawing, angle is shown
Outside the arc
Special reference to title block
Inside the arc
Chain line in a drawing stands for:
Centre line of a circle
Centre line of an object
A cutting plane line on an aeronautical diagram would consist of:
Medium or heavy alternating long dashes and two short dashes with an arrowhead at each end.
A continuous heavy line with an arrowhead at each end.
A medium alternating one long dash and one short dash with an arrowhead at each hand.
Arrow form each side of cutting plane
It means the direction
It means the opposite direction
Has a number with it
. ---
. Show the cross section direction
Internal structure is shown in a drawing by:
Part sectional and revealed sectional view
Internal part
Revolved section
Detail drawing
Auxiliary view
Changes on the drawing should be authorized by:
Manufacturer and vender of the drawing
UK CAA or HK CAD
Modification approval not by CAD
Drawing, where is material located?
Upper right
The aeronautic drawing the bill of material list on
The side opposite the title block
In the title block
Above the title block
When included on an aircraft drawing, the bill of material provides:
A list of every material required to manufacture the part
The cost and availability of materials required to manufactures the part.
The source of supply of material required for manufacture the part
Title block include
Assemble instruction and part NO and drawing name
Drawing name and scale and item name
Maintained instruction scale and the item name
Phantom line represent
Hidden part
Missing part
Moving part
Cut sheet metal
Solid fix line
Material list of drawing is used to provide
All material use of component
Available material use for component
Drawing master reference list shows
All components
Current issue number
Standard parts reference
The difference between minable dimension and high limit or low limit is known as the
Allowance
Tolerance
Clearance
Dimension of drawing
Nominal and tolerance
Tolerance on drawing is:
Difference between upper and lower limit from normal dimension *
Spare part component’s material can be made by original equipment:
Manufacturer
Manufacturer and company authorized by manufacturer
Manufacturer and company authorized by aviation authority
If the aircraft is modified, it will be shown on which document?
The point should be reflected in Maintenance Manual
The point should be part of the modification data sheet
The point should be recorded in the Technical logbook
Modification related to equipment configuration etc can be shown on which document:
C of A
Type certificate data sheet
Type certificate
Change on drawing:
Submit a Form DCA282
When received modification approval note from CAD
Approved HKAR-145 organization
A mandatory modification is approved after
Certificate of design is granted by manufacturer
Receiving an Airworthiness Approval Note
Modification parts of the aircraft can be considered:
Design aspects of aircraft
Repairs and to a degrade aspects
Aircraft bolts are usually manufactured with a:
Class 1 fit for the threads
Class 3 fit for the threads
Class 5 fit for the threads
Class of fit rivets in aircraft
Class 3
Common class of fit in aircraft
Class 2 or class 3
Class 4 or class 5
Class 1 or class 2
A class 1 fit bolt can be driven:
A wrench only
By fingers
By a pneumatic wrench
Close tolerance bolt is used:
Where hole is larger than bolt
Where bolt is larger than hole
With stiff nut
Outside diameter of pin is larger than the inside diameter of hole
Clearance fit
Transition fit
Interference fit
Interference fit is
The pin diameter is smaller than the hole diameter
The pin diameter is larger than the hole diameter
The pin and the hole are same diameter
Where the cylinder head of a piston engine is heated and screwed onto the cylinder barrel which has been chilled. The type of fit obtained between the two components would be:
Transition fit
Interference fit
Clearance fit
Interference fit of bearing barrel in hole:
Heat the hole material
Transition fit:
A intermediate fit between interference fit and clearance fit is also called push fit
Clearance fit:
Hole is bigger than shaft
For smaller hole fitting:
Interference fit
Class 2AG of UNF threads:
Maintains the allowance for Class 2A
AN173 and AN186 close tolerance bolts have tolerance about
Positive 0.05 inch, negative 0.05 inch
Positive 0.01 inch, negative 0.01 inch
Positive 0.0000 inch, negative 0.0005 inch
Close clearance bolt tolerance
0.002
0.2
0.02
In MIL, aircraft parking is classified as
MIL-P-7034
MIL-P-5351A
MIL-P-5000
Trouble shooting can be defined as:
Trial and error method to find out the cause of a fault
Locate the malfunction component
Replacing the faulty component
---
To check the manfluncation system to determine the fault
Identify the common fault component
Locate the malfunction component
Suspected system swap in the similar component to help troubleshooting, further damage will occur if
If component is good, the failure is in elsewhere, (good component damaged by system)
If component is bad, and a hidden system fault cause to unserviceable
There are multiple causes of defects
What happens if components are swapped during troubleshooting?
The original component is fine but other component causes the failure
Multi faults which contribute to the failure
To display system operation and the decisions to be made as the system is explored. The trouble-shooter can draw a:
Logic chart
Circuit diagram
Schematic diagram
What is the better practice when carrying out troubleshooting?
Better known on the system
When carrying out troubleshooting on a complex system:
Divide the system into small equal parts, then isolate the fault by elimination *
Over-speed of a rotor damage to
Gearbox mounting
Rotor blade
Rotor shaft
Backlash in flight control system will cause:
Fluttering of control surfaces
Proposing
A hydraulic system was fill with two different types of fluid,
It can normal working with 2 different types of fluid
The complete system should be flushed
The complete system should be flushed and some/all seal should be replaced
The grease task describes a particular manufacturer's grease by product with MIL spe+This grease is unavailable but another manufacturer's other grease performing same MIL spec is available, so you would:
Do not use other manufacturer's grease regardless of the fact that it is of the same MIL spec
Only use other manufacturer's grease if it is of the same colour and consistency.
Use the other manufacturer's grease unless specifically prohibited by the aircraft manufacturer
How to check a taper hole,
€.
Use engineering blue….
Insert a sample bolt
Zone 900
Is reserved
Refers to the landing gears and doors
Refers to crew bunk area
MADU when test a ARINC629 cannot display why
Hold the “o” ring to reset
It cannot test 629
Wait for a time for microprocessor to intermit fault
When the aircraft stopped, the elevator position should
Flow down position
Neutral position
Flow up position
Triangle landing gears for aircraft parked in strong wind
Neutral
Ground pneumatic to start gas turbine
Slight high
Equal
Slight low
The pressure of pneumatic engine start:
Slightly higher than bleed manifold pressure
Red index on the fix part of nose landing gear(是最大可转弯的角度)
To tell pilot not to turn beyond
To indicate what angle the nose gear turn
---
By light pressure hand, pull the wire from connector
Half inch
One inch
One eighth inch long
Zinc-cadmium coat supplied to dissimilar metal
€and nickel
Copper and nickel
Carbon steel and tin
Twist wire
Normal twist force
Unscreened cable should be kept away from the signal cable
18 inches
Tensiometer:
Measures cable tension
Assemble the hydraulic sys, replace the new seals, and make sure that
The same material with the before seal
The same part NO with the before seal
The same dimension with the before seal
Two or more operation should be performed to strip wire with hand operated wire stripper if the stripping length is exceeded
0.25 in
0.50 in
0.75 in
After tyre burst on tail mount engine A/C, which check should be taken: TAECO M7.19
Engine run
MCD
Engine debris ingestion check
During bearing maintenance, which one is correct?
Shield bearing can be re-pack
It is necessary to lubricate the shaft and bearing rings
When carry out an borescope inspection on the engine turbine, it is necessary to isolate the engine system, the purpose is to:
Prevent borescope equipment and engine from damage.
Prevent injury of person.
A bushing 与 hole 的安装
Heat to expand
Chilled to shrink
Lubrication but not heat and chilled
When use a 5X magnifying glass to inspect a fatigue area, you can see
Blastering to remove aluminium alloy corrosion:
Aluminum oxide
Blast nozzle on work surface
Hold on the surface so that remove appropriate 1 inch diameter path
All of above
If the lock mechanism in a plug is fail, it is likely to
Open circuit
Short circuit
Function normal for a short time
Liquid penetrant test cannot:
Locate sub-surface discontinuities
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