SHET METAL
Sheet Metal Mastery Quiz
Test your knowledge of sheet metal techniques and aircraft construction with our comprehensive quiz. Whether you're a seasoned professional or just starting out, this quiz will challenge your understanding of key concepts and methodologies in the field.
Topics covered include:
- Rivet types and sizes
- Metal bending techniques
- Aircraft assembly methods
- Sealing and fastening processes
What is the process used to describe sealing between two sheets?
Fillet sealing
Fay sealing
Dome sealing
Injection sealing
How is the locking part of the HI Lites and HI Locks secured?
Driven with a snap and rivet gun
Pulled with a hydraulic pneumatic puller
Torqued till the hex head breaks away
Pulled with a double action pulling head
Why do aircraft engine mounts have rubber shock mounts?
So the engine will fall off
To save weight
To stop vibration
To make it easy to attach
What is the locking mechanism that the high shear fastener uses?
A bucktail that is formed with a conventional rivet gun and bucking bar
A high strenght nut is torqued into the threads.
A collar is squeezed into performed grooves.
A nut that has a breakaway part that shears off at a predetermined value
What are the identifying marks on an AN470 B rivet?
Double dash on the head.
Ring on the head.
Cross on the head.
Dimple on the head.
What would cause damaged to the rivet head? "smile"
Pulling the gun off the rivet while still riveting
Faulty rivet
Air pressure to low
Bucking bar to heavy
When bending aircraft sheet metal which way is preffered?
With the grain
Across the grain
Use different metal
Vetically
What way do you turn a micro stop - counter sinker too make it go deeper?
Left
Clockwise
Counter Clockwise
Don't have to turn it is automatic
When drilling holes for AN470 rivets, the minumum pitch between rivets?
1/4 inch in all cases.
1 1/2 times the rivet diameter
3 times the rivet diameter
2 1/2 times the rivet diameter
What should be done when a crack is located in a skin on the aircraft?
Apply structural adhesive to the spot.
Stop drill the end of the crack
Sand the area smooth and deburr
Call local authorities to inform them
When calculating the layout for an angle with a single 90 bend what should you do?
Add the setback to only one side
Add the setback to both sides
Subtract the setback from one side only.
Subtract the setback from both sides.
What is the correct drill bit size for an AN470 AD4-4 rivet?
#11
#21
#30
#40
What are the proper shop head dimensions when a rivet is formed?
2.5 wide and 1 high times the diameter
.5 wide and 1.5 high times the diameter
.15 wide and 5 high times the diameter
1.5 wide and .5 high times the diameter
In a fuselage station marking system, what is used what is the name as the zero position?
Start line
Water spot
Datum
End line
What classification of sealant is the best choice for a fillet application
Class A
Class B
Class AB
Class C
What is the main purpose for de-burring holes?
Prevent corrosion
Ensure a tight fit
Prevent personal injury
Ensure proper countersinking
If you have done your calculations correctly to find the amount of metal you need on your metal project for benind what is this measurement?
Total development width
Metal layout project lenght
Metal cutting project width
Stretch out cutting lenght
Rivet Lenght is measured in what increments?
1/16 inch.
1/32 inch
3/32 inch
1/8 inch
What is the proper way to mix most sealants used on aircraft?
By colour
By weight
By volume
By smell
What are the structural members called in the wing that form the wing shape from root to tip?
Wing forms
Wing ribs
Shape forms
Contour forms
What do the identifying marks on the heads of aluminum alloy rivets indicate?
Specific alloy used in the manufacture of the rivets.
Corrosion proofing or other special process used in the manufacture of the rivets
Degree of dimensional and process control observed during manufacture
Head shape and specifications adhered to during manufacturing
Why would you dimple an aluminum skin instead of countersinking it for installing flush rivets?
Dimple because it is better than countersinking
The aluminum skin is too thin to countersink
Countersink because it is better than dimpling
The aluminum skin is too thick to countersink
What is the most popular aircraft landing gear configuration?
Tricycle
Mono
Floats
Conventional
What is rivet diameter measure in?
1/16 inch.
1/32 inch
3/32 inch
1/8 inch
What is the machine called we bend our sheet metal on?
A vice
A brake
A shear
A bender
What is the name of the fuselage construction where all of the structural load is carried by the skin?
Semi-monocoque
Truss
Empennage assembly
Monocoque
You are laying out a part to be fabricated which includes a bend. Two lines are drawn where the bend will start and finished what is the name between the lines called?
Sight Allowance
Bend Allowance
Neutral Axis
Set back
When temporarily fastening two pieces of aluminum alloy together priot to riveting what hole size would you use in a 3/16 diameter
#40 hole
#10 hole
#30 hole
1/8 hole
What is the main stress a rivet is designed to withstand?
Torsion
Tension
Compression
Shear
If damaged area is too big to be patched, how are you going to fix the damage?
Use a flush patch
Replace the entire aircraft
Don't do anything
Replace the entire part
What is the meaning of sealant working life?
The life expectance of the sealant
The time it takes to mix the sealant
The time sealant can be applied
How long the sealant will last.
What is the main reason aluminum is used in aircraft construction?
Hard to weight ratio
Soft and easily workable
Easily weldable
Light weight to strenght ratio.
What is the reason a doubler is installed in a skin repair?
Returns strength to the skin and an area to install a patch
Strenghtens the patch and allows skin to be replaced.
Allows for extra charges when calculation repair costs
Gives strenght to aircraft skin only
What is the identifying marks on the head of a MS20426 B 4-8 rivet?
A raised dot
Two raised dahses
A riased cross
A raised circle
What is the name of the layout line on a piece of sheet metal which is set or placed even with the nose radius bar what is it called?
Neutral axis line
Bent tangent line
Setback line
Sight line
What is the main structural member used to carry loads in the wings?
The wing spar
The wing struts
The stringers and skin
The longerons and skins
Why are skies installed on aircraft
To land on water
To land on snow
To land on runaways
To land on gravel
What is the correct statement for an AN426 AD rivet?
It needs to be soften to facillitate riveting
Its head is marked with a dimple.
Needs to be heat treated before using
Head has no markings.
If you are going to find the sight line, what would you do on a single bend?
Add bend allowance to finished size
Add bend radius to calculated flat
Subtract bend radius from finish size
Recalculate your flats to fit
What is the distance between rivets called?
Edge distance
Transverse
Gauge
Pitch
A rivet AN426A6-4 is identfied by what?
A cross on the rivet head
No mark on the head
A dimple on the head
A raised dot on the head
What is the reason we make joggles in material?
To give added strenght
To produce overlapping skin joints
To increase the edge distance
To produce a flush joint on overlapping skins.
What is a cherry-max rivet?
It is only used for NACA riveting
It is a blind rivet
It is a solid rivet
You can only use it in a nonstructural area.
What is the wing structures that require an external brace?
Cantilever wing.
Truss wing
Semi-cantilever wing
Semi-monocoque wing
What are the two basic types of patches of stressed skin repair?
Top patch and low profile
Scab patch and flush patch
Internal doubler and conventional patch
External cover and inside patch
For a closed angle of 60 degrees, how far must you bend the work?
60 degrees
Less than 90 degrees
120 degrees
More than 360 degrees
What is minimum edge distance for an AN426 river?
2 times the diamter
3 times the diamter
2 1/2 times the diamter
3 1/2 times the diamter
Where is butt and fillet sealing applied?
Joints and edges of sheet metal
Inside the cylinders of the engin only
On top of the shop heads of the rivets
Under the waterline of the airplane
What is a Dimplier used for?
To shave a solid rivet flush to the skin
To counter sink the metal for flush riveting
For deburring the edge of the metal
For dimpling the metal for flush riveting
What is the rivet designation that has a countersunk head, 3/16 inch diameter, 3/8 inch long, made from 2024 aluminum and 2 bar raised
AN426 DD6-6
AN470 AD3-6
AN426 AD6-6
AN470 B3-3
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