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單項(xiàng)選擇題

A common trouble with the fuel pump plunger or fuel valve spindle is （）.

A.water leakage
B.steam leakage
C.oil leakage
D.air leakage

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單項(xiàng)選擇題

A charge of fresh air is drawn into the engine cylinder and then （） by the moving piston（） very high pressure.

A.pressed；to
B.pressurized；with
C.pushed；in
D.compressed；to

單項(xiàng)選擇題

A cast steel strong back is fitted in way of the combustion space to help absorb （）.

A.flame temperature
B.fuel oil
C.air movement
D.gas forces