A.lime
B.frost
C.scale
D.scar
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A.scar
B.scale
C.spur
D.bilge
A.continuously
B.regularly
C.constantly
D.period
A.to change the lube oil
B.have the lube oil purified
C.have the lube oil burnt
D.to analyze the lube oil
A.not less than twice
B.greater at least twice than
C.not greater twice than
D.larger three times than
A.not be changed
B.be changed
C.should not be changed
D.should be changed
最新試題
To determine if the lube oil filter elements need changing, （）.
In using reduction gears to obtain efficient propeller speeds, （）.
An automated diesel engine should normally shut down due to （）
A diesel engine piston ring face is in direct contact with the （）.
What is the function of the thrust bearing?（）
White smoke exhausting from an operating diesel engine may indicate （）.
In diesel engines, the four basic events (intake, compression, power and exhaust) are performed once in （）.
A diesel engine is operating with excessively high exhaust temperatures at all cylindersTo correct this condition, you should FIRST （）.
The ability of the governor to prevent fluctuations in engine speed is termed （）.
Combustion knock occurring in a diesel engine can be caused by （）.