单项选择题

The normal color of the exhaust gas of the diesel will be （）

A.achromatism or thin gray
B.thin white
C.sky-blue
D.black

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单项选择题

During the running of the diesel engine, if the supply of cooling water is interrupted or the temperature of cooling water out of the cylinder is too high, the duty engineer should （）

A.notify the duty officer, reduce the engine speed, take some measures to remove failures
B.notify the duty officer and stop the engine immediately, find the cause and remove failures
C.notify the C/E
D.notify the captain

单项选择题

If the main engine starting consecutively failed （） times, it should be found the cause before another starting.

A.2
B.3
C.4
D.5

单项选择题

Before engaging the turning gear and turning the diesel engine, which of the following operation should be done except （）

A.open the indicator cocks
B.supply some LO to cylinder liner wall with lubricator
C.put the fuel handle in the "stop" position
D.pump up the air bottle