单项选择题
In a bypass type lubrication system for a diesel engine, the dirty oil line to the centrifuge should be taken from the （）.
A.lube oil pump suction line B.lube oil pump discharge line C.bottom of the lube oil sump D.outlet from the lube oil header
单项选择题 Theoretical perfect combustion in a diesel engine yields by-products of （）.
单项选择题 Which of the following devices is a common basic element with nearly all mechanical governors?（）
单项选择题 A change in the degree of fuel atomization in a diesel engine would most greatly affect （）.
