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單項(xiàng)選擇題

In a single acting, four-stroke/cycle diesel engine, the power impulse in an individual cylinder occurs （）

A.once every crankshaft revolution
B.once every two crankshaft revolutions
C.once every piston stroke
D.twice every piston stroke

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單項(xiàng)選擇題

When a ship is involved in an oil pollution incident in China, the ship must report without delay to（）

A.China Maritime Administration
B.the company
C.the cargo owner
D.ship owner

單項(xiàng)選擇題

Faulty operation of diesel engine fuel injection nozzles can be directly caused by （）.

A.water in the fuel oil supply
B.excessive fuel nozzle holder cooling
C.a distorted fuel spray pattern
D.leakage past the plunger into the oil drain

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