Comp 8 part 3
Engineering and Mechanics Quiz
Test your knowledge of engineering and mechanical principles with our comprehensive quiz! This quiz features 56 questions covering a range of topics such as materials, machining processes, and pump maintenance.
Key Features:
- 56 engaging questions
- Multiple choice format
- Ideal for students, teachers, and professionals
Stainless steel is an alloy composed mainly of?
Titanium and aluminum
Chronium and steel
Vanadium and iron
Won and steel
Which of the following process will a hacksaw blade start a cut more easily?
Cutting vertically upward
Turn the saw blade at right angles to the saw frame
File a eick where the cut is to be started
Apply the same pressure on both backward and forward stroke
Temporary repairs to an open DC propulsion armature coil can be made by___.
Removing the sparking brushes
Disconnecting coil ends, insulating each, and short circuiting the two commutators bars
Connecting the coils end directly to a pair of negative brushes
Grounding the coil end short circuiting the commutator bars
A pressure gauge pointer responding sliggishly to changes in pressure, should be repaired by_____.
Greasing the hair spring
Tapping the gage housing lightly
Cleaning the residue from gear teeth
Bending the needle to free the linkage
A follower rest should make use of a lathe to machine
Threads on long slender shafts
Large diameter stock between centers
Round stock to finished dimension
Work mounted on the lathe carriage
A centrifugal pump vibrates excessively during operation, Upon dissasembling the pump it is found that the impeller is out of balance, without an available spare, you should__.
Drill holes through the heavy side of the impeller until it balances
Remove metal from the heavy side by machining in a lathe
Weld counter weights to the light side of the impeller
Acid wash and scrape the heavy side until it balances
The dead center of a lathe can be used only after the end of the work piece, How does the lathe hold the workpiece?
Center drill
Counter bore
Convex
Taper
A diesel engine fails to start due to excessive water in the fuel. WHich items on the list where the water should removed before the engine can be started?
Fuel lines
Lube oil filter
Rocker arm reservior
Crank case pump
A side from welding the best materials to use in bonding pipes carrying low temperature liquids or fluids is____.
Cold compress
Soldering gun
Epoxy resin
Graphite grease
What is the complete process when copper plates are used for making gaskets that is usually annealed by heating red cherry color?
Quenching slowly with oil
Cooling slowly in air
Drawing its temper quickly
Dousing with cold water
What is the theoretical lift of a pump handling fresh water at atmospheric pressure?
14.7m
101.35m
1.02m
10.35m
What safety precautions should be done changing the spindle speeds on the lathe machine?
Engage the speed change lever
Disengage the spindle cluctch
Stop the late operation
Disengage the feed reverse relay
What is the primary used of a soft face hammer or mallet?
For driving/removing nails
For striking a surface without causing damage
For removing a scale,weld slug, etc. From metal surfaces
For producing heavy blows
In order to prevent overheating of the packing in the stern tube stuffing box___.
The gland nuts must be tightly taken up to prevent any water leakage
Cooling water is supplied from the fresh water cooling system
The gland is properly adjusted to permit a slight leakage of sea water
Stave-type rubber seals are used
To avoid deformation when cutting thin sheet metal while using a handle hacksaw it should be place between two____.
Pieces of cloth
Block of steel
Blocks of wood
Pieces of sand paper
Which of the following metal materials has the lowest cutting speed for an effective rough cutting operation if a high speed cutter is to be used in the modern milling machine onboard?
Brass
Milleable iron
Bronze
Carbon steel
During routine maintenance inspection of a centrifugal pump. Scoring on a pump shaft sleeve is detected, which of the following action should be taken?
Correct the cause of the scoring and repair the sleeve or replace with a new one
Reassemble the unit and provide more water leak off for proper lubrication
Reassemble the unit and adjust the governor to obtain a slower speed
Check for parallel alignment of the sleeve radial faces to the sleeve bores
When saw blades are fixed in a hand-held hacksaw frame, which of the following can move forward and reverse stroke?
Raker blade
Rod
TPI
Regular hacksaw blade
When replacing packing rings in the stuffing boxes of reciprocating pump piston rods, the ends of the rings should be cut?
Beveled
Square
Step-designed
Diagonal
The loop seal connected to main condenser return the drain from the__.
Outercondenser
Aftercondenser
Intercondenser
Vent condenser
Which of the listed tools should be used to remove a tapered roller bearing from a shaft?
A tapered come-a-long
A steel drift pin and hammer
An arbor press
An acetylene torch and hammer
Which of the following method listed would be most effective in repairing a steam cut on a seating surface of a super heater hand hole plate?
Filling the cut by welding and then grinding it smooth
Refacing the surface and over torquing the hand hole plate
Grinding the seating surface and installing an oversized gasket
Filling the cut with iron cement or plastic steel
Which one of the list should a flat chisel is the proper tools used for cutting?
Flat stock
Slot or keyways
Half-round grooves
Inside corners
Babbit is a metal alloy commonly used as the lining for?
Cylinder liners
Bearing
Saltwater piping
Piston
An acceptable method of temporary repairs in the vessel hull is___.
Double-plater to be fitted
Drive the wedge
Apply a patch of sheet packing backed by a hole and shoring
Shore up the crack with welded brace
Before using an all-purpose electric measuring instrument (multimeter) utilizing internal batteries to supply power for resistance measurements, you should first___.
Remove all the batteries
Calibrate using a known external resistance
Remove one of the batteries
Select the proper resistance range
The lower water seal on a diesel engine wet cylinder liner must allow for liner expansion and contraction, This seal is most commonly a___.
Neoprene O-ring
Flexible metallic seal ring
Soft copper gasket
Precision ground flange goint
Safety valve gags should only be installed hand tight in order to prevent:
Bending of the valve stem
Mage to the gag
Compression of the valve spring
Over pressurizing the valve body
This method is used for joining sheet metal and for attaching studs, rods and busses etc to plates.
Acetylene welding
Bond fusion
Current friction
Resistance welding
When tightening the nozzle nut of fuel injector which of the following tools is used?
Close wrench
A spanner and an extension
Torque wrench
Pipe wrench
Labyrinth seals used to reduce leakage around a turbine shaft are constructed of __.
Machine packing strips of fins
Staged rubber composition seal stripping
Spring bound carbon segments
Braided asbestos covered core segments
A dial indicator is used to measure?
Scribed layout on vertical surfaces
Shaft accentricity
Clearances
Deviation from circularity of an oval
When steel, cast iron, or other metals with surface scale are being turned, what roughing cut should be taken first?
Slowly prevent the tool chatter.
Get under the scale deep enough
Avoid dulling the tool
Rapidly chip the surface
What is the ultimate stress of mild steel used in boiler plates?
35 tons/sq.m
20 tons/sq.m
30 tons/sq.m
25 tons/sq.m
What type of file will produce a fine finish when draw filling ?
Mill cut
Double cut
Single cut
Bastard cut
Which drill size would you use to machine and tap a 3/4 national coarse internal threads?
21/32 inches
25/32 inches
27/64 inches
31/64 inches
Pipe threads are made of what tools are you use?
Apply maximum pressure at the start of the cut
File a nick where the cut is to be sterted
Coat the saw blade with oil before starting the cut
Place the saw blade facing the saw frame
If a drill press is used to completely bore through a metal plate, feed pressure on the drill bit should be eased as the bit braks through the bottom of the hole to prevent.
Overspeeding the spindle
Drilling undersized holes
The drill bit from jamming and spinning the workpiece
Overheating the drill
What is the end of shaft condition before the maintenance repair is carried out?
Reamed
Peened
Center drill
Chamfered
Before boring a blind tapered hole, a good shop practice to follow is__.
Drill to the small diameter
Use a taper reamer
Bore a straight hole
Drill to the large diameter of the taper
If the capacity of a centrifugal pump decreases gradually over a long period of time you should replace the___.
Packing gland
Lantern rings
Mechanicals seals
Wearing rings
Antifreeze solution containing ethylene glycol, should not be mixed with corrosion protection oils, as the resultant mixture?
May create dangerous gases
May cause frothing
Is dangerously flamable
May cause emulsion
Low pressure steam is used to keep air from leaking into turbine casing along the turbine shaft,, for this purpose which of the following steam systems is used?
Superheated steam system
Gland leakoff steam system
Direct admission of 35psi auxiliary steam
Gland sealing steam system
How do you make it easier for a hand hacksaw to cut a work piece?
It will dig into the work piece and tend to whirl around
It will not break cleanly through the bottom of the work piece
It will cut an elongated hole in the bottom of the work piece
It will form a tapered hole in the bottom of the work piece
A follower rest should make use of a lathe to machine
Large diameter stock between centers
Worked mounted on the lathe carriage
Threads on long slender shafts
Round stock to a finished dimension
The best method of fixing a winch motor bearing of the sealed type that is running hot is to?
Allow the winch to run at slow speed only
Apply a light oil to the bearing housing
Add grease through the zerk fitting
Replace the bearing with a new one
Why should two pipe joints be properly aligned before being connected?
Misalignment of the joints will result to excessive strain
Condensate rapidly accumulates when flanges are not properly aligned
The pipe will be completely blocked by even the slightest amount of misalignment
Misalignment permits excessive expansion
How would you checked the alignment of coupling faces?
Using an inside micrometer
Visually adjusting alignment
Inserting a feeler gage to different points of the coupling
Inserting a thermocouple
The gasket and the broken studs have been replace on tank manhole cover, which of the following methods is satisfactory for testing the repair?
Fill the tank via the ballast pump until water flows from the vent line opening on deck
Pressure the tank with 10psig, air, soap the repaired area, watch for visible signs of leakage or bubbles
Hose test the repaired area with a minimum of 100psi water pressure
Fill the tank with water via ballast pump
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