單項(xiàng)選擇題Early injection timing is indicated by ().

A.high exhaust temperature and low firing pressure
B.high exhaust temperature and high firing pressure
C.low exhaust temperature and low firing pressure
D.low exhaust temperature and high firing pressure


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1.單項(xiàng)選擇題A faulty injection in one cylinder of an operating diesel engine can be located by ()

A.cutting out individual injectors and noting engine performance
B.checking lube oil temperature
C.checking cam position
D.using a timing light

2.單項(xiàng)選擇題What harmful condition can result if a diesel engine is operated at very light loads for long periods of time?()

A.increased carbon buildup
B.burning of intake valves
C.excessive firing pressures
D.increased fuel consumption

3.單項(xiàng)選擇題Turbocharged four-stroke/cycle diesel engines utilize valve overlap for().

A.improving cylinder scavenging
B.preheating the combustion chamber
C.reducing air charge density
D.preventing valve wear

4.單項(xiàng)選擇題Operating a propulsion diesel engine at less than 30% of designed normal load for prolonged periods will result in ().

A.decreased fuel consumption per brake horsepower
B.more complete cylinder scavenging
C.extended valve life
D.carbon formation on combustion chamber surfaces

5.單項(xiàng)選擇題A dirty fuel oil filter element can be detected by ()

A.Visual inspection of the element
B.the pressure drop cross the filter
C.high fuel oil tank temperature
D.increase flow rate from the filter

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Which of the listed governor characteristics will greatly affect the load sharing relationship between paralleled diesel generators?()

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

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

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

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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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The treatment of the fuel oils involves storage, heating, filtering and()

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

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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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