单项选择题
Before starting a diesel engine that has an engine driven lube oil pump, the engineer should （）.
A.open the bypass line B.cut in the lube oil cooler C.pressurize the lube oil system D.top off the expansion tank
单项选择题 The small end of the connecting rod is attached to the piston with a （）.
单项选择题 Increasing the load on an engine equipped with a constant speed mechanical governor, will cause the engine speed to initially （）.
单项选择题 A dirty diesel engine oil filter element can best be detected by （）.
