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單項選擇題

The most crucial time for any bearing with regards to lubrication is （）

A.during low loads
B.after proper oil viscosity is reached
C.during starting
D.after cleaning filters

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單項選擇題

If a main propulsion diesel engine hunts excessively at idle speed, you should （）

A.adjusts the idle speed control
B.drain and flushes the governor and replace the oil
C.adjusts the compensating needle valve

單項選擇題

The amount of fuel delivered for each cycle must be in accordance with the engine load, and the same quantity of fuel must be delivered to each cylinder for each power stroke at that load.Which of the following statements describes this requirement?（）

A.Proper timing
B.Accurate metering
C.Suitable injection rate
D.Suitable atomization rate

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