During the diesel engine running, the water level of FW expansion tank should normally kept in the （） level of glass tube.

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

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

单项选择题In the process of the stand-by, warm-up the engine usually through give preheat of which parts of the diesel engine?（）

A.cooling water of the cooling system
B.fuel of the FO system
C.LO of the LO system
D.cooling water of the cooling system and LO of the LO system