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单选题
The oil index of main engine should be controlled to prevent it from in heavy weather（）
A
over heat
B
over speed
C
over pressure
D
over worn
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单选题When a ship is fully loaded, it needs to prevent the main engine to be（）.While a ship is fully empty, it needs to prevent the main engine to be（）.A
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单选题The oil index of main engine should be controlled to prevent it from in heavy weather（）A
over heatB
over speedC
over pressureD
over worn
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the viscosity indexB
the fuel oil contentsC
the starting speedD
the reading at the rack
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run at an irregular speedB
create high lube oil temperatureC
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the main enginesB
the auxiliary enginesC
the emergency generator engineD
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单选题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 offB
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only of nonferrous, noncorrosive metalsD
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单选题The construction of the main propulsion engine lube oil sump should （）A
have no plating joints of 90B
retain the lube oil as long as possible before it recirculates through the systemC
provided drain/return lines that are no greater than 24 inches from the pump suctionD
be provided with only a perfectly horizontal bottom
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the piston cooling oil return pipesB
the main and crankpin bearingsC
thrust and intermediate bearingsD
stern tube and thrust bearings
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