單項(xiàng)選擇題The rate of wear on a cylinder liner depends on the ()

A.quality of air filtration
B.effectiveness of lubrication
C.type of fuel used
D.all of the above


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1.單項(xiàng)選擇題In diesel engineering practice, the term used to express the ignition quality of a particular fuel is()

A.cetane number
B.octane number
C.ignition index number
D.volatility point

2.單項(xiàng)選擇題The cetane number rates fuels for diesel engines according to its ()

A.antiknock characteristics
B.ignition qualities
C.rates of vaporization
D.viscosity

3.單項(xiàng)選擇題Diesel engine starting difficulties due to cold intake air temperatures, can be overcome by using a/an()

A.increase in starting air pressure
B.increase in lube oil viscosity
C.compression expansion device
D.jacket water heater

4.單項(xiàng)選擇題The burning of fuel oil in a diesel engine having a high sodium content, will cause ()

A.corrosion and grooving of exhaust valves
B.corrosion and gumming of the fuel injection pump
C.salt deposits in the exhaust manifold
D.slag deposits in the fuel injection equipment

5.單項(xiàng)選擇題The consistent burning of fuel oil with a high sulfur content in a diesel engine will result in ()

A.clogged fuel injection pumps
B.increased cylinder liner wear
C.intake valve stem corrosion
D.varnish deposit on pistons

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

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

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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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Under MARPOL Code the ship to which it applies has to carry ()

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The Port State Control officer may witness a fire drill carried out by the crew assigned to these duties on the()

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

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

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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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