A.make
B.cause
C.result
D.produce
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A.boiler
B.heater
C.engine
D.cooler
A.to retain
B.to remain
C.to maintenance
D.to have
A.good lubrication
B.low thermal stress
C.good mechanical properties
D.acid corrosion
A.for starting diesel engines
B.in pneumatic control system
C.in pneumatic tools
D.All the above are true
A.the air receivers
B.the starting valves
C.the cylinder covers
D.the distributors
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When fuel oil has seriously contaminated a diesel engine lubricating oil, you should （）.
A thrust bearing is used with a propulsion diesel engine to （）.
In a simple mechanical governor, the （）.
The main purpose of the piston oil scraper rings is to （）.
The function of diesel engine piston compression rings is to （）.
If a diesel engine is difficult to start and operates with the engine temperatures lower than normal, you should suspect that the （）.
Lube oil filters remove contaminants more efficiently if the oil being filtered is （）.
Routine monitoring of a diesel engine should include （）.
Electrically operated safety devices on auxiliary diesel engines function to stop the engine by （）.
What causes diesel fuel to be ignited in the cylinder of an operating diesel engine?（）