Sulfur contamination may retard the setting reaction ofwhich ofthe following impression materials()

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• A centrifuge will satisfactorily remove which of the following contaminants from fuel oil?（）

  A . Gasoline B . Water C . Lubricating oil D . sulphur compound

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• Diesel engine fuel oil contamination often results in （）

  A . governor malfunctions B . fuel injection system malfunctions C . high cylinder lube oil temperatures D . low intake temperature

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• Sulfur has occasionally been found in the earth in an almost pure state.

  A . regularly B . accidentally C . sometimes D . successfully

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• Contamination污染

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• When carrying a cargo of asphalt or molten sulfur，which are carried at temperatures of over 300°F，one of the biggest dangers is（）.

  A . water in the tanks or pipelines B . having the cargo too cool C . explosion of vapors after discharge D . inadequate ullage space

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• Fuel oil contamination of an auxiliary diesel engine lube oil can result in（）

  A . an increased flash point B . higher lube oil pressures C . an increased viscosity D . lower lube oil pressure

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• The most common contaminate of governor hydraulic fluid is （）.

  A . moisture B . dirt C . acid D . air

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• 沾染contamination

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• Lube oil filters remove contaminants more efficiently if the oil being filtered is （）.

  A . under high pressure B . under low pressure C . heated to reduce viscosity D . cooled to increase viscosity

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• When using a fuel with a higher than normal sulfur content in an auxiliary diesel engine, you should（）

  A . maintain higher than normal jacket water temperature B . change the lube oil more frequently than normal C . maintain a higher air-box temperature than normal D . maintain a higher air-box pressure than normal

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• Diesel engine lube oil can become contaminated as a result（）

  A . the water produced during combustion B . the sulfur in the fuel C . unburned fuel oil D . all of the above

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• Burning fuel with a high sulfur content in a diesel engine will （）

  A . increase thermal efficiency B . cause clogging of the fuel system C . increase the ability of the engine to start in cold weather D . produce corrosion in the cylinder and exhaust system at low load

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• 关于环境的规定，涂装配套应识别需要的contamination程度。

  A . 正确 B . 错误

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• 硫循环 sulfur cycle

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• Small oil spills on deck can be prevented from contaminating any waters by （）.

  A . plugging all scuppers and drains B . placing floating booms around the ship C . regularly emptying all drip pans D . thoroughly draining all bunkering hose

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• The major source of chemical contaminants in hydraulic fluid is （）.

  A . microscopic steel shavings B . abrasive waste C . anti-oxidant compounds D . oxidation by-product

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• Hydraulic machinery failures are commonly caused by contamination of the hydraulic fluid and （）.

  A . fluid friction B . fluid turbulence C . component misalignment D . pressure surge

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• 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 pisto

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• When fuel oil has seriously contaminated a diesel engine lubricating oil, you should （）.

  A . filter to remove the fuel oil B . use the settler to remove the fuel oil C . remove the fuel oil by centrifuging D . drain and then renew the lube oil supply

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• 混染作用（contamination）

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• 沾染（contamination）

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• Dumped waste might contaminate water supplies.

  A．destroy B．decrease C．delay D．pollute

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• Burning fuel with a high sulfur content in a diesel engine will ＿.

  A.increase thermal efficiency B.cause clogging of the fuel system C.increase the ability of the engine to start in cold weather D.produce corrosion in the cylinder and exhaust system at low loads

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• X射线污染X-ray contamination 名词解释

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