lubricant
coolant
combustion product
second refrigerant
第1题：
A magnetic strainer is used in the diesel engine reduction gear oil system to remove small particles of
A.water
B.babbitt
C.iron or steel
D.acids
第2题：
A bypass line provided around a waste heat auxiliary boiler in a diesel engine exhaust system, may be used to avoid boiler ______.
A.corrosion at low engine loads
B.erosion at high engine loads
C.overload at high engine loads
D.scaling at all exhaust temperatures
第3题：
A thrust bearing is used with a propulsion diesel engine to ____.
A.control axial movement of the crankshaft
B.transmit engine thrust to the propeller shaft
C.absorb vibrations in the propeller shafting
D.prevent propeller thrust from being transmitted to the hull
第4题：
compensate for low oil level
increase governor promptness
prevent governor hunting
limit engine load
第5题：
principle
principal
cause
case
第6题：
In an auxiliary diesel engine bypass type lubricating oil system, the main lube oil pump forces_______ .
A.all of the oil used by the engine through a filter
B.some of the oil used by the engine through a filter
C.some of the oil used by the engine through a centrifuge
D.all of the oil used by the engine through a centrifuge
第7题：
A Kort nozzle is a(n) ______.
A.hollow tube surrounding the propeller used to improve thrust
B.nozzle attached to a firefighting hose
C.intake valve on a diesel engine
D.piston cylinder on a diesel engine
第8题：
_____ the engines, the diesel engine is ____ used engine on board
A.Between / more commonly
B.Among / the most commonly
C.Between / not more commonly
D.Among / not the most commonly
第9题：
cylinders
exhaust valves
pistons
fuel valves
第10题：
control axial movement of the crankshaft
transmit engine thrust to the propeller shaft
absorb vibrations in the propeller shafting
prevent propeller thrust from being transmitted to the hul