單項(xiàng)選擇題A bronze bearing liner with a lead-tin flashing has a milky-white color over most of its surface and some areas of exposed bronze, the white coloring indicates()

A.proper break-in wear
B.improper break-in wear
C.relocation of the overlay flashing
D.water contamination of the lube oil system


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1.單項(xiàng)選擇題If a diesel engine turned over freely but failed to start, the cause could be ()

A.water in the fuel
B.cold lube oil
C.excessive starting air pressure
D.excessive fuel pressure

2.單項(xiàng)選擇題If it becomes necessary to cutout an individual cylinder of a large, low-speed, main propulsion diesel engine, the fuel to that cylinder should be secured and its ()

A.fuel pump should be removed and all connections blanked off
B.cylinder oil feed rate should be increased slightly above that used at normal sea speed
C.cylinder oil feed rate should be reduced
D.cylinder oil feed rate should be increased to the maximum flow capable of the metering pump

3.單項(xiàng)選擇題The satisfactory operation of diesel engine exhaust valves usually depends on()

A.the proper back pressure
B.the cooling water temperature
C.correct timing and proper seating
D.accurate metering and the exhaust temperature

4.單項(xiàng)選擇題If an auxiliary diesel engine frequently stalls, the trouble may be caused by ()

A.low exhaust back pressure
B.air in the fuel system
C.gasket blow-by or leakage
D.incorrect assembly of idler springs

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The condensers located in various stages of a flash evaporator are cooled by()

題型:單項(xiàng)選擇題

Which of the diesel engine components listed increase air density and helps to improve engine operating efficiency?()

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As soon as a diesel engine has started, which of the listed engine operating parameters should be checked FIRST?()

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One of the reasons that cause oil flowed from sludge outlet of a self-cleaning separator is()

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The additional mark ()in the Classification Certificate for Machinery means propulsion apparatus is remotely controlled on the navigating bridge control station, and engine assembly control station is unmanned periodically.

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

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() is not installed on the main switchboar.

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Which one is NOT the ‘clear grounds’ for a more detailed inspection?()

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If separating effect is not good, which measure should be taken ()

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When does auxiliary burner of incinerator put into operation? ()Ⅰ. start incinerator when it is coldⅡ. the sludge for dealing with is littleⅢ. the sludge for dealing with is largeⅣ. the water and impurity in sludge are too muchⅤ. the temperature in incinerator is lowⅥ. dealing with little solid rubbish

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