單項(xiàng)選擇題One of the differences between a two-stroke engine and a four-stroke engine is,()

A.a two-stroke engine works without exhaust operation
B.a two-stroke engine works without compression stroke
C.a two-stroke engine works without expansion stroke
D.a two-stroke engine works without suction operation


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1.單項(xiàng)選擇題In a diesel engine,() works as working medium and changes the heat energy to mechanical energy, changes the reciprocating movement to rotary moment()

A.fuel spray; the burning of the fuel
B.the burned gas mixture; connecting rod
C.medium shaft;crankshaft
D.the burned gas mixture; piston rod

2.單項(xiàng)選擇題In a diesel engine, offers the heat energy directly(); works as working medium and changes the heat energy to mechanical energy()

A.the burning of the fuel; medium shaft
B.fuel spray; fresh air
C.fuel; fuel spray
D.the burning of the fuel; the burned gas mixture

4.單項(xiàng)選擇題Why a gearbox is needed in a ship driven by a medium-speed diesel engine?()

A.To reduce the main engine speed
B.To increase the main engine speed
C.To govern the main engine speed
D.To fix the propeller shaft

5.單項(xiàng)選擇題Which one is not true?()

A.Two main areas of skill are involved in the construction of ship
B.There are distinct divisions in responsibilities between naval architects and marine engineers
C.Each ship will assume varying proportions according to its type
D.Ships can be divided into different categories from different perspectives

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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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()connectors hold best if a wire is accidentally pulled or a connection becomes loose.

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

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

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By comparing the exhaust gas temperature of each cylinder, the operator can determine if the load is balanced throughout the engine. The device most commonly used is a()

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

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

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

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