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單項(xiàng)選擇題

Doors are generally formed in the （） of the both in-line and Vee engines to give maintenance access to the crankshaft main and connecting rod large end bearing.

A.bedplates
B.columns
C.cylinder blocks
D.safety caps

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單項(xiàng)選擇題

Dirty oil must be （） before being used again.

A.mixed with clean oil
B.purified
C.heated
D.strained

單項(xiàng)選擇題

Dirt in the fuel oil system of a diesel engine can cause （）.

A.clogged filters
B.poor combustion
C.overloading of the diesel
D.shock of fuel lines

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