A.must to stand inoperative
B.has to stand inoperative
C.must be stood idle
D.will stand idle
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A.repaired
B.replaced
C.replenished
D.repeated
A.viscosity
B.flash point
C.acid value
D.temperature
A.lubricant
B.coolant
C.combustion product
D.second refrigerant
A.differential of crank-webs
B.indicator diagrams
C.lube oil reading out
D.misalignment of crank-throws
A.many thousand times
B.between times
C.one time
D.at times
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A diesel engine piston ring face is in direct contact with the （）.
In a simple mechanical governor, the （）.
The highest pressure in a diesel engine cylinder normally occurs （）.
If the main engine of an unattended engine room shuts down automatically, it will be indicated by an alarm （）.
Maximum horsepower of a diesel engine is attained （）.
The most important factor in engine performance is the actual power output at the end of the crankshaft available for doing workThis is known as （）.
For a given size engine, the two-stroke/cycle diesel engine will deliver more power than a four-stroke/cycle diesel engine because （）.
Control of the main propulsion diesel engines can be shifted from the engine room to the wheelhouse from the （）.
Combustion knock can occur in the cylinders of a diesel engine under any condition permitting （）.
Lube oil cannot be efficiently filtered if its （）.