单项选择题
What preventative maintenance should be done frequently to diesel engine starting air receivers?（）
A.Drain the accumulated moisture
B.Test the relief valves
C.Watch the temperature to prevent fluctuations in pressure
D.Clean the interior to remove oil and foreign matter
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相关考题
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单项选择题
Crank web deflection readings will give a positive indication of （）.
A.worn main bearing journals
B.torsional stress deformation
C.slack thrust bearings
D.bearing shells shim dimensions -
单项选择题
A decrease in the flash point of diesel engine lube oil indicates the lube oil has become （）.
A.contaminated with sludge
B.contaminated with carbon
C.diluted with fuel oil
D.diluted with water -
单项选择题
The emulsion of the oil is mainly caused by （）.
A.the solid impurities of large particle
B.the solid impurities of fine particle
C.the water content
D.both water and solid impurities
