1.2.4 船舶柴油机润滑系统(3)

轮机英语题库翻译·海大版

good ____ properties will be essential.

A.defrosting B.de-oiling C.demulsifying D.dehumidifying 注 对于透平油，因为要与水蒸气接触，因此必须具有良好的抗乳化性能。C

63.The amount of fluid friction or internal friction inherent in a mineral lubricating oil

is reflected as a measure of its ____.

A.specific gravity(比重) B.viscosity

C.TBNnumber D.hydrolytic(水解的)stability 注 润滑油中的内阻力大小是用黏度来表示的。B

64.Start the turning gear, and with some one hand-operating the cylinder lubricators at

regular intervals, and with the indicator cocks ____,and with the control gear in the ____ position, give the engine at least one complete turn.

A.open; “stop” B.closed; “stop” C. open; “start” D.closed; “start” 注 启动盘车机，定期手摇气缸油注油器，打开示功阀，控制机构在停车位置，对主机盘车至少一圈。A

65.The lubrication to the cylinders affected by the fire must be ____ to prevent seizure

and all scavenge drains must be ____ to prevent the discharge of sparks and burning oil from the drains into the engine room

A.decreased; opened B.decreased; shut C.increased; opened D.increased; shut

注 为了防止咬缸，发生扫气着火的气缸应该加大气缸油量，并且为防止火星和燃烧的油从放残口进入机舱，所有扫气放残口须关闭。D

66.One characteristic of a lubricating oil adversely affecting the result of centrifuging

is ____.

A.high TBN value B.low oil floc point

C.low oil demulsibility D.low oil neutralization number 注 滑油比较低的抗乳化性对其分离是不利的。C

67.Which of the following characteristic of lube训helps to reduce the amount of

deposits in the piston ring belt during the combustion process in a diesel engine?

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轮机英语题库翻译·海大版

A.Low viscosity index. B.Low carbon forming tendencies. C.High film strength. D.High non-corrosive qualities 注 滑油的低结炭性能有助于减少柴油机在燃烧过程中活塞环带沉积物的形成。B

68.Most large, low-speed, main propulsion diesel engines use duplex lube oil strainer

to ____.

A.decrease the time required between cleanings B.removes all large and small foreign objects C.ensure a positive flow of oil at all times

D.ensure that all lube oil has been treated twice

注 多数大型低速主机使用双联滑油滤器,这样可以使滑油在任何时候都正常工作。C

69.Which of the following statements concerning the lubrication of diesel propulsion

engines used in vessels over 300 gross tons is most accurate?

A.Lubrication systems using engine driven lube oil pumps do not require any additional independent arrangement when such arrangements have been proven reliable.

B. The use of engine driven pre-lube pumps is permitted on vessels with propulsion systems developing less than 500 shaft horsepower.

C. When forced lubrication is used for propulsion engines, one independently driven stand-by pumps is to be provided in addition to the necessary pumps for normal operation.

D.Lubrication systems where two oil coolers are fitted require a minimum of two temperature control devices which may be actuated by similar sensors.

注 对于300总吨以上的主机润滑，如果采用的是强制润滑，除了正常工作所需泵外，应该备有一台独立驱动的滑油泵。C

70.The pressure differential across a diesel engine lube oil system dupIBx filter should

be checked to ____.

A.determine the need for filter cleaning B.measure any change in oil viscosity C.prevent damage to the filter

D.determine the need for batch filtration

注 柴油机滑油系统滤器前后压差决定滤器是否需要清洗。A

71. The most crucial time for any bearing with regards to lubrication is ____.

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轮机英语题库翻译·海大版

A.during low loads B.after proper oil viscosity is reached C.during starting D.after cleaning filters 注 主轴承润滑的最关键时刻是机器刚启动时。C

72. Main propulsion engine lube oil sumps should be constructed ____.

A.so as to never be integrallube B.with a sloped bottom

C.only of nonferrous,noncorrosive metals

D.with drain/return lines terminating just above or at the designed normallevel 注 主机滑油泵底部应具有一定的倾斜。D

73. The construction of the main propulsion engine lube oil sump should ____.

A.have no platingjoints of 90

B.retain the lube oil as long as possible before it recirculates through the system C.provided drain/return lines that are no greater than 24 inches from the pump suction

D.be provided with only a perfectly horizontalbottom

注 主机油底壳的结构应使滑油在油底壳的时间尽可能长，然后再在系统里重新循环。B

74. Diesel engine automated control systems may utilize sensing devices of dual

function with sensing ranges providing both alarm and engine shut down capability. Which of the key points would only require an alarm sensor?

A.Lube oil pressure and temperature. B.jacket water pressure and temperature. C.Engine over-speed. D.Lube oil sump level. 注 柴油机自动控制系统可以采用双作用传感设备，即报警和停车，油底壳只需要一个报警传感器。D

75.Which of the listed cylinder liner surface conditions indicates proper lubrication?

A.Dull black appearance B.Bright appearance. C.Thin layer of lacquer. D.Thick oily film. 注 气缸套表面光亮表明润滑良好。B

76.To function properly, oil control rings used on a diesel engine piston must

distribute sufficient oil to all parts of the cylinder wall and must also ____.

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轮机英语题库翻译·海大版

A.prevent any lubricant from reaching

B.prevent excessive lubrication from reaching the combustion space C.Provide metal-to-metal contact to seal the cylinder against blow-by

D.assure a positive means of scraping carbon accumulation from the cylinder 注 柴油机活塞上的油环工作正常时，应该向缸壁各处充分布油，防止过多滑油进入燃烧室。B

77.How often should the lubricating oil of a diesel engine be changed?

A.After every trip. B.Every 4000 hours.

C.According to manufacturer's instructions. D.Every time they are shutdown 注 柴油机滑油的换油周期应根据厂家说明书而定。C

78.The ability, of lubricating oils to resist viscosity changes during temperature

changes is indicated by the ____.

A.american petroleum B.institute number viscosity index number

C.seconds saybolt furol number D.seconds saybolt universal number 注 黏度指数表明，温度变化会影响滑油黏度的变化。B

79.Lubricating oil used in a diesel engine serves to ____.

A.reduce the wear of bearing surfaces B.coolthe bearing surfaces C.assist in sealing bearing surfaces D.All of the above. 注 柴油机滑油的作用是减摩、冷却、密封等。D

80.One of function of diesel engine lubricating oil is to ____.

A.induce carbon formation on cylinder walls

B.improve fuel penetration in the combustion space C.form a friction reducing film between mating surfaces D.lubricate the fuel injection

注 柴油机滑油作用之一是在配合表面之间形成减小摩擦的油膜。C

81.A large, low-speed, crosshead, main propulsion diesel engine using residual fuel

oils must have a cylinder oil having a ____.

A.low TBN value B.high alkaline reserve C.low flash point D.high pour point 注 大型低速十字头式主机烧重油时，应该使用碱值较高的气缸油。B

82.A lube oil filter can be used to remove most contaminants from lube oil. A

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轮机英语题库翻译·海大版

contaminant which will remain in the lube oil after filtering is ____. A.abrasive B.fuel oil C.sediment(沉淀物) D.impurities 注 滑油滤器能去除滑油中绝大多数污染物。滑油经过净化后仍残留的污染物是燃油。B

83.Proper lubrication of the main bearing is more easily obtained in a single acting

four-stroke/cycle diesel engine than in a single acting two-stroke/cycle diesel engine because ____.

A.bearing pressure in a four-stroke/cycle acting single diesel engine is continually reversed

B.bearing pressure in a two-stroke/cycle single acting diesel engine is continually reversed

C.the maximum bearing pressure is higher in a single acting two-stroke/cycle diesel engine

D.two-stoke/cycle diesel engines require more complicated lubrication piping 注 四冲程柴油机与二冲程柴油机相比较，主轴承的润滑更容易一些，因为前者轴承压力是连续翻转（交替）的。A

84. In order to keep excess oil from the intake ports in two-stroke/cycle diesel

engines,____.

A.wide compression rmgs are used B.oil rings are located above the piston

C.chromium plating is used on all piston rings

D.oil rings are located near the bottom of the piston skirt

注 二冲程柴油机为了防止滑油进入进气口，活塞裙下部应安装油环。D

85.The main reason for the use of cylinder oil is to____.

A.lubricate the piston rings and liner

B.Cool the piston and liner

C.Improve combustion efficiency D.Protect the jacket

注 汽缸油使用用来润滑活塞环和缸套的。 A

86. On most modem diesel engines, the main and connecting rod bearings receive

their lubricating oil by ____.

A.banjo feed(放射管润滑) B.splash feed(飞溅润滑) C.gravity feed(重力润滑) D.pressure feed(压力润滑)

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