A.the crosshead
B.the crankshaft
C.large end
D.the piston bosses
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A.gravity
B.motion
C.ratio
D.density
A.compression
B.maximum
C.rated
D.oil
A.the viscosity index
B.the fuel oil contents
C.the starting speed
D.the reading at the rack
A.have nothing to do with
B.having nothing to do with
C.have much to do with
D.having much to do with
A.a transfer pump
B.a bilge pump
C.a service pump
D.a vacuum pump
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The main purpose of the piston oil scraper rings is to （）.
White smoke exhausting from an operating diesel engine may indicate （）.
Maximum horsepower of a diesel engine is attained （）.
If a diesel engine is difficult to start and operates with the engine temperatures lower than normal, you should suspect that the （）.
When fuel oil has seriously contaminated a diesel engine lubricating oil, you should （）.
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Routine monitoring of a diesel engine should include （）.
The function of diesel engine piston compression rings is to （）.
In a simple mechanical governor, the （）.
If the main engine of an unattended engine room shuts down automatically, it will be indicated by an alarm （）.