單項(xiàng)選擇題In the two stage flash distilling plant, which of the pumps listed is vented to the shell of the second stage in order to remove vapor from the pump suction?()

A.Condenser circulating water pump
B.Feed-water heater drain pump
C.Distillate pump
D.Air ejector condenser drain pump


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1.單項(xiàng)選擇題The purpose of an oil mist detector in a main propulsion diesel engine is to warn of ()

A.excessive mist density in the crankcases
B.excessively high crankcase vacuum
C.excessively high bearing temperature
D.excessive carbon buildup in the lube oil

2.單項(xiàng)選擇題Permitting a diesel engine fuel oil day tank to run dry can cause ()

A.overheated injection pumps
B.water condensation in the cylinders
C.fuel dilution of the lube oil
D.air in the fuel system

3.單項(xiàng)選擇題Water in the fuel can prevent the engine from starting, prevent it from developing full power, or ()

A.run at an irregular speed
B.create high lube oil temperature
C.cause the engine to over-speed
D.cause blue smoke in the exhaust

4.單項(xiàng)選擇題In a single acting, four-stroke/cycle diesel engine, the power impulse in an individual cylinder occurs ()

A.once every crankshaft revolution
B.once every two crankshaft revolutions
C.once every piston stroke
D.twice every piston stroke

5.單項(xiàng)選擇題When a ship is involved in an oil pollution incident in China, the ship must report without delay to()

A.China Maritime Administration
B.the company
C.the cargo owner
D.ship owner

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

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The shipboard oil pollution emergency plan will be invalid after ()

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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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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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Engine parameters shall be corresponded to NOx Technical Files. This is required by ()

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Diesel engine air start system check valves are opened by ()

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()are used to digest the sewage to produce innocuous sludge in a biological sewage treatment plant.

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A purge recovery system is used in a centrifugal air conditioning or refrigeration system to ()

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To shut down a diesel engine after it exceeds the set maximum speed,which type of device listed should be used?()

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

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