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單項(xiàng)選擇題

Valve gear knocks are more easily located while the engine （）.

A.is running
B.stops
C.is repaired
D.lacks of oil

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單項(xiàng)選擇題

VIT means （）

A.variable injection timing
B.variable inlet tonnage
C.vertical incoming tonnage
D.vertical inlet tank

單項(xiàng)選擇題

Under manoeuvring condition the main engine may run on （）.

A.gas oil
B.marine diesel oil
C.residue oil
D.crude oil