单项选择题

The highest pressure in any closed diesel engine freshwater cooling system is at the （）.

A.jacket water outlet
B.expansion tank inlet
C.heat exchanger inlet
D.cooling water pump outlet

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单项选择题

The lube oil cooler is located after the lube oil filter in order for （）

A.the filter to operate more efficiently
B.the lube oil cooler to be bypassed
C.positive lube oil pump suction to be assured
D.galvanic action in the cooler to be minimized

单项选择题

In a large, slow-speed, main propulsion diesel engine, which of the parts listed is under tension when the engine is running?（）

A.Bed plate
B.Column
C.Entablature
D.Tie rod

单项选择题

The color of the exhaust from a diesel engine should be （）

A.clear
B.hazy light brown
C.hazy light blue
D.hazy light grey