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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Proper filtering and straining of fuel oil is important because the （）.
The ability of the governor to prevent fluctuations in engine speed is termed （）.
Diesel engine control can be obtained by the bridge （）.
Engine protection by means of an alarm or shutdown control can be obtained with devices that are sensitive to （）.
Combustion knock occurring in a diesel engine can be caused by （）.
In using reduction gears to obtain efficient propeller speeds, （）.
Combustion knock can occur in the cylinders of a diesel engine under any condition permitting （）.
The function of diesel engine piston compression rings is to （）.
White smoke exhausting from an operating diesel engine may indicate （）.
A thrust bearing is used with a propulsion diesel engine to （）.