Before starting a diesel engine that has an engine driven lube oil pump the engineer shou

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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

请帮忙给出正确答案和分析,谢谢!

热搜:a是b的充分条件,b是a的必要条件吗