單項(xiàng)選擇題The main source of fuel injection system malfunctions is ()

A.improper adjustments
B.contaminated fuel
C.coated fuel lines
D.excessive vibration


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1.單項(xiàng)選擇題The most crucial time for any bearing with regards to lubrication is ()

A.during low loads
B.after proper oil viscosity is reached
C.during starting
D.after cleaning filters

2.單項(xiàng)選擇題If a main propulsion diesel engine hunts excessively at idle speed, you should ()

A.adjusts the idle speed control
B.drain and flushes the governor and replace the oil
C.adjusts the compensating needle valve

4.單項(xiàng)選擇題Air bubbles in a hydraulic governor can cause ()

A.sluggish response
B.speed droop variations
C.isochronous governing
D.sensitivity increase

5.單項(xiàng)選擇題On a diesel engine equipped with an isochronous governor, if the “speed droop” control is reduced to the “zero” setting, the engine ()

A.speed will drop drastically with any increase in load
B.will stop due to zero fuel supply
C.will stall upon application of load
D.speed will remain fairly constant despite load changes

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The additional mark ()in the Classification Certificate for Machinery means propulsion apparatus is remotely controlled on the navigating bridge control station, and engine assembly control station is unmanned periodically.

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Cold weather starting of a diesel engine may be made easier by()

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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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The condensers located in various stages of a flash evaporator are cooled by()

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The main purpose of port State control is not to()

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One of the reasons that cause oil flowed from sludge outlet of a self-cleaning separator is()

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