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單項(xiàng)選擇題

In a （） engine the charge of air in the cylinder before compression commences is above atmospheric pressure.

A.pressure charged
B.naturally aspirated
C.contaminated
D.high speed diesel

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單項(xiàng)選擇題

If there is water in fuel oil, the revolution of the engine will （）.

A.decrease
B.increase
C.be dismantled
D.be reassembled

單項(xiàng)選擇題

If the sump（）were to rise this would indicate water leakage into the oil an d an investigation into the cause must be made.

A.temperature
B.viscosity
C.lever
D.level