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單項選擇題

Lube oil filters remove contaminants more efficiently if the oil being filtered is （）.

A.under high pressure
B.under low pressure
C.heated to reduce viscosity
D.cooled to increase viscosity

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單項選擇題

Proper filtering and straining of fuel oil is important because the （）.

A.fuel oil pump will over-speed if dirt is not removed
B.fuel oil transfer pumps cannot tolerate small amounts of dirt in the oil
C.fuel injectors may be damaged by foreign particles in the fuel oil
D.dirty fuel will clog the intake air filter

單項選擇題

An automated diesel engine should normally shut down due to （）

A.low lube oil temperature
B.high ambient air temperature
C.low tube oil pressure
D.high exhaust system back pressure

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