1.
Cavitation, the forming and bursting of vapor filled cavities or bubbles will result in .............................
1) A loss of thrust
2) Erosion of the blade surface
3) Vibrations in the afterbody of the ship
4) Noise
5) All above<<<<<<<<<<<<<<<<<<<<
2.
.............................. protects the pump shafts from erosion, corrosion and wear
1) Wearing rings
2) Renewable sleeves<<<<<<<<<<<<<<<<<<<<<<<<<<
3) A hardened metal coating
4) Internally flooded lantern rings
5) Lantern rings
3.
Insufficient refrigerant in a refrigeration plant on board a ship may result in:
1) High discharge pressure
2) Frosting of the crankcase
3) High temperature of the overboard water
4) Low suction pressure<<<<<<<<<<<<<<<<<<<<<<<<<
5) Low temperature of the sea water
4.
An advantage of aluminum pistons compared to cast iron pistons is:
1) Greater high temperature strength
2) Greater weight per cubic meter
3) Increased resistance to wear
4) Low temperature strength
5) Better heat conductivity<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
5.
The air supplied to the cylinders by a turbocharger is often reduced in volume by a/an:
1) Air compressor
2) Diffuser
3) Filter
4) Venturi
5) Aftercooler<<<<<<<<<<<<<<<<<<<<<<<<
6.
Sediment collects in a tubular purifier:
1) On top cover
2) In drain line
3) On sides of bowl<<<<<<<<<<<<<<<<<<<<<<<<<
4) On the discs
5) None of above
7.
A cracked cylinder head on a diesel engine could be indicated by:
1) Excessive lube oil consumption
2) Water draining from the fuel leakoff valves
3) Excessive fuel oil consumption
4) Excessive cooling water consumption
5) Combustion gases venting at the expansion tank<<<<<<<<<<<<<<<<<<<
8.
If one cylinder was getting more fuel then others the effect will be ...............
1) That cylinder's being overloaded
2) The exhaust valve's being overheated
3) Average compression<<<<<<<<<<<<<<<
4) Incomplete combustion
5) Complate combustion
9.
What harmful consequence can result from sludge in the lube oil system of a trunk piston diesel engine?
1) Clogged oil pump suction screens
2) Increased oil temperature
3) Stuck piston rings
4) Any of the above<<<<<<<<<<<<<<<<<<
5) None of the above
10.
An electric heater built into the cylinder water jacket would be used to:
1) Raise lube oil viscosity for easier starting in cold weather
2) Increase air inlet temperature
3) Increase compression ratio
4) Increase jacketwater temperature for easier starting in cold weather<<<<<<<<<<<<<<<<<<<<<
5) Heating compressed air
11.
Which valve is normally closed when charging an R-22 or R-134 a refrigeration system through the high side?
1) The thermal expansion valve
2) The dehydrator inlet valve
3) The suction line valve
4) Both the thermal expansion valve and dehydrator inlet valve
5) The liquid line king valve<<<<<<<<<<<<<<<<<<<<
12.
When operating at high or low speed in the use of nozzles in a turbine, attention and precaution must be taken that ........................
1) The nozzles in use should be wide open
2) Operation with a few nozzles as it's economical
3) The nozzles not in use must be tightly closed
4) All above<<<<<<<<<<<<<<<<<
5) Only 1 and 2
13.
The valve which is always partially open when the evaporator is in operation is the:
1) Vapor valve
2) Continuous blowdown valve<<<<<<<<<<<<<<<<<<<<
3) Bottom blowdown valve
4) Surface blowdown valve
5) Fresh water valve
14.
It shall be the responsibility of the ................ to prepare the boilers for inspection.
1) Chief Engineer<<<<<<<<<<<<<<<<<<<<
2) 2nd Engineer
3) Boatswain
4) 2nd officer
5) Any above organization
15.
"Water hammer" is caused by:
1) Hitting water pipe with hammer
2) Too much water in pipe line system
3) Water in steam lines<<<<<<<<<<<<<<<<<<<<<<<
4) Steam in water lines
5) Few amount of water in pipe line system
16.
The thermostatic expansion valve of R-22 or R-134 a refrigeration system controls the:
1) Back pressure in the evaporator coils
2) Temperature in the refrigerated space
3) Superheat in the refrigerant leaving the evaporator<<<<<<<<<<<<<<<<<<<<<<<<
4) Refrigerant pressure in high side
5) Temperature in the condenser
17.
A propulsion diesel engine is normally shut down by .........................
1) Shutting off the air supply
2) Overspeeding the engine
3) Securing the fuel supply<<<<<<<<<<<<<<<<<<<<<<
4) Securing the ignition system
5) All above
18.
Studs and nuts intended for use in main steam line flanges and fittings are marked with an "H" or a "T" to show they are:
1) Heat resistant<<<<<<<<<<<<<<<<
2) Hard finished
3) Half threaded
4) Corrosion resistant
5) Fire proof
19.
What kind of bolts would you use on a saltwater line?
1) Cold rolled
2) Brass<<<<<<<<<<<<<<<<<<<
3) Cast iron
4) Plastic
5) All of the above
20.
The removal of contaminating impurities from lubricating oil will ................
1) Increase engine wear
2) Decrease engine wear
3) Increase possible breakdowns
4) Decrease possible breakdown
5) 2 and 4<<<<<<<<<<<<<<<<<<<<<<<
Cavitation, the forming and bursting of vapor filled cavities or bubbles will result in .............................
1) A loss of thrust
2) Erosion of the blade surface
3) Vibrations in the afterbody of the ship
4) Noise
5) All above<<<<<<<<<<<<<<<<<<<<
2.
.............................. protects the pump shafts from erosion, corrosion and wear
1) Wearing rings
2) Renewable sleeves<<<<<<<<<<<<<<<<<<<<<<<<<<
3) A hardened metal coating
4) Internally flooded lantern rings
5) Lantern rings
3.
Insufficient refrigerant in a refrigeration plant on board a ship may result in:
1) High discharge pressure
2) Frosting of the crankcase
3) High temperature of the overboard water
4) Low suction pressure<<<<<<<<<<<<<<<<<<<<<<<<<
5) Low temperature of the sea water
4.
An advantage of aluminum pistons compared to cast iron pistons is:
1) Greater high temperature strength
2) Greater weight per cubic meter
3) Increased resistance to wear
4) Low temperature strength
5) Better heat conductivity<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
5.
The air supplied to the cylinders by a turbocharger is often reduced in volume by a/an:
1) Air compressor
2) Diffuser
3) Filter
4) Venturi
5) Aftercooler<<<<<<<<<<<<<<<<<<<<<<<<
6.
Sediment collects in a tubular purifier:
1) On top cover
2) In drain line
3) On sides of bowl<<<<<<<<<<<<<<<<<<<<<<<<<
4) On the discs
5) None of above
7.
A cracked cylinder head on a diesel engine could be indicated by:
1) Excessive lube oil consumption
2) Water draining from the fuel leakoff valves
3) Excessive fuel oil consumption
4) Excessive cooling water consumption
5) Combustion gases venting at the expansion tank<<<<<<<<<<<<<<<<<<<
8.
If one cylinder was getting more fuel then others the effect will be ...............
1) That cylinder's being overloaded
2) The exhaust valve's being overheated
3) Average compression<<<<<<<<<<<<<<<
4) Incomplete combustion
5) Complate combustion
9.
What harmful consequence can result from sludge in the lube oil system of a trunk piston diesel engine?
1) Clogged oil pump suction screens
2) Increased oil temperature
3) Stuck piston rings
4) Any of the above<<<<<<<<<<<<<<<<<<
5) None of the above
10.
An electric heater built into the cylinder water jacket would be used to:
1) Raise lube oil viscosity for easier starting in cold weather
2) Increase air inlet temperature
3) Increase compression ratio
4) Increase jacketwater temperature for easier starting in cold weather<<<<<<<<<<<<<<<<<<<<<
5) Heating compressed air
11.
Which valve is normally closed when charging an R-22 or R-134 a refrigeration system through the high side?
1) The thermal expansion valve
2) The dehydrator inlet valve
3) The suction line valve
4) Both the thermal expansion valve and dehydrator inlet valve
5) The liquid line king valve<<<<<<<<<<<<<<<<<<<<
12.
When operating at high or low speed in the use of nozzles in a turbine, attention and precaution must be taken that ........................
1) The nozzles in use should be wide open
2) Operation with a few nozzles as it's economical
3) The nozzles not in use must be tightly closed
4) All above<<<<<<<<<<<<<<<<<
5) Only 1 and 2
13.
The valve which is always partially open when the evaporator is in operation is the:
1) Vapor valve
2) Continuous blowdown valve<<<<<<<<<<<<<<<<<<<<
3) Bottom blowdown valve
4) Surface blowdown valve
5) Fresh water valve
14.
It shall be the responsibility of the ................ to prepare the boilers for inspection.
1) Chief Engineer<<<<<<<<<<<<<<<<<<<<
2) 2nd Engineer
3) Boatswain
4) 2nd officer
5) Any above organization
15.
"Water hammer" is caused by:
1) Hitting water pipe with hammer
2) Too much water in pipe line system
3) Water in steam lines<<<<<<<<<<<<<<<<<<<<<<<
4) Steam in water lines
5) Few amount of water in pipe line system
16.
The thermostatic expansion valve of R-22 or R-134 a refrigeration system controls the:
1) Back pressure in the evaporator coils
2) Temperature in the refrigerated space
3) Superheat in the refrigerant leaving the evaporator<<<<<<<<<<<<<<<<<<<<<<<<
4) Refrigerant pressure in high side
5) Temperature in the condenser
17.
A propulsion diesel engine is normally shut down by .........................
1) Shutting off the air supply
2) Overspeeding the engine
3) Securing the fuel supply<<<<<<<<<<<<<<<<<<<<<<
4) Securing the ignition system
5) All above
18.
Studs and nuts intended for use in main steam line flanges and fittings are marked with an "H" or a "T" to show they are:
1) Heat resistant<<<<<<<<<<<<<<<<
2) Hard finished
3) Half threaded
4) Corrosion resistant
5) Fire proof
19.
What kind of bolts would you use on a saltwater line?
1) Cold rolled
2) Brass<<<<<<<<<<<<<<<<<<<
3) Cast iron
4) Plastic
5) All of the above
20.
The removal of contaminating impurities from lubricating oil will ................
1) Increase engine wear
2) Decrease engine wear
3) Increase possible breakdowns
4) Decrease possible breakdown
5) 2 and 4<<<<<<<<<<<<<<<<<<<<<<<