單項(xiàng)選擇題Fuel is ignited in a diesel engine cylinder by ()

A.a spark plug
B.injectors
C.the heat of compression
D.increasing jacket water temperatures


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1.單項(xiàng)選擇題Vessels having main engines arranged for air starting are to be provided with at least ()

A.one automatic drain serving both containers
B.two air starting containers of approximately equal size
C.one control air container and one starting air container
D.one additional means of starting the main engine

2.單項(xiàng)選擇題Injectors for use with heavy fuel oil must be cooled by either water or light oil to ()

A.prevent heat corrosion to internal components
B.increase fuel delivery rate and economy
C.prevent pre-ignition
D.avoid carbonization of the nozzle tips

3.單項(xiàng)選擇題If the water level dropped rapidly in the expansion tank of a closed diesel engine cooling water system, you should suspect a ()

A.loss of suction in the circulating pump
B.leak in the primary cooling system
C.broken raw water pump shaft
D.burned or cracked piston in one cylinder

4.單項(xiàng)選擇題To minimize the formation of carbon deposits on fuel injection nozzles, you should ()

A.avoid using liquid-cooled nozzles whenever possible
B.avoid low cooling water temperatures
C.avoid prolonged overloading of the engine
D.make certain the gasket seal between the nozzle and cylinder head is tight

5.單項(xiàng)選擇題In a simple mechanical governor, the ()

A.centrifugal force rotates the ball-head
B.flyweight centrifugal force is balanced by spring force
C.flyweight centrifugal force is balanced by hydraulic pressure
D.speeder spring alone actuates the fuel control rod

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

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

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() is not installed on the main switchboar.

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The flash point of a residual fuel oil should be used to determine the highest temperature to which oil may be heated()

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Refrigerant entering the compressor of a refrigeration system should be in which of the following conditions?()

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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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“Insufficiency of manning or insufficiency of certification of seafarers” is an identification of a()

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Flame failure in an automatically fired auxiliary boiler can from a/an ()

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

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