单项选择题
Injection lag in a diesel engine may be caused by（）
A.a higher cetane number of fuel oil
B.the diesel fuel used having a high viscosity
C.mechanical rigidity in the lube pump mechanism
D.a decrease rigidity in the fuel pump delivery pressure
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相关考题
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单项选择题
Which of the following relationships should occur between the temperature developed in a combustion space, and the compression ratio of the engine?（）
A.Higher compression ratios create higher temperature
B.Higher temperatures create higher compression ratios
C.low temperatures create higher compression ratios
D.Higher compression ratios create low temperatures -
单项选择题
An acceptable method of measuring for the correct rotational force applied to the connecting rod and main bearing bolts, is to use a（）
A.torque wrench
B.monkey wrench
C.pipe wrench
D.slugging wrench -
单项选择题
Which of the listed types of starting systems is often used on large, low-speed, direct reversing, main propulsion diesel engines?（）
A.Electric
B.Hydraulic
C.Air
D.All of the above
