A.have no plating joints of 90
B.retain the lube oil as long as possible before it recirculates through the system
C.provided drain/return lines that are no greater than 24 inches from the pump suction
D.be provided with only a perfectly horizontal bottom
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A.cause an alarm condition
B.secure power to the indicator
C.secure power to the monitored device
D.automatically recluse within 10 seconds
A.Fuel oil service pump discharge
B.Fuel oil strainer
C.Fuel oil heater
D.Fuel oil flow meter
A.maintain even distribution of bearing wear
B.maintain a constant oil temperature
C.maintain a pressurized film between moving surfaces
D.remove entrained water
A.so as to never be integral lube
B.with a sloped bottom
C.only of nonferrous, noncorrosive metals
D.with drain/return lines terminating just above or at the designed normal level
A.is an indication of the amount of noncombustible material present in the oil
B.indicates the quantity of energy released by burning a unit amount of the fuel
C.is useful for determining proper atomization temperatures
D.reflects the overall thermal efficiency of the fuel oil service system
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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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Which of the diesel engine components listed increase air density and helps to improve engine operating efficiency?（）
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“Insufficiency of manning or insufficiency of certification of seafarers” is an identification of a（）
（）are used to digest the sewage to produce innocuous sludge in a biological sewage treatment plant.
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