1.2.4 船舶柴油机润滑系统(2)

轮机英语题库翻译·海大版

C.Large cross head type; the cylinders D.Four-stroke; pistons and cylinders 注 大型十字头柴油机一般有两套润滑系统：润滑气缸的是完全消耗型润滑系统和润滑运动装置和冷却活塞的循环系统。C

32. In some diesel engine designs, the injection of cylinder oil is timed to impinge

when the piston ____ and only impinge on ____.

A.is coming upward; cylinder ring belt B.is going downward; piston ring belt C.is coming upward; piston ring belt D.is going downward; cylinder ring belt

注 在某些柴油机设计中，当活塞上行时气缸注油器定时向气缸中注入气缸油，且只注射到活塞环带上。C

33. Large crosshead type engine generally has two lubrication systems,a function

performed only by cylinder oil system is ____.

A.lubricating B.cooling C.sealing D.cleaning

注 大型十字头柴油机通常有两套润滑系统气缸油的一个功能是起密封作用C

34.Large crosshead type engine generally has two lubrication systems,a function

performed only by crankcase oil system is ____.

A.lubricating B.cooling C.cleaning D.neutralizing 注 大型十字头柴油机通常有两套润滑系统曲轴箱油的功能是起冷却作用。B

35.In an oil cooler circulated by sea water, the oil is at a larger pressure the result

being that any leak in the cooler will mean a loss of ____.

A.oil B.sea water C.refrigerant D.fresh water

注 在海水循环的油冷器中，油压比水压高，结果是油冷器发生泄漏时，只损失了滑油。A

36.In large marine diesel engines cylinder oils usually contain additives formulated to

impart the ____ to clean the rings and grooves.

A.inefficiency B.oiliness(润滑性) C.detergency(去垢性) D.purity 注 大型船用柴油机的气缸油通常含有添加剂，其中清洁剂用来清洁活塞环和环槽。C

37.Oi1 is supplied to the cylinder wall and ____ by means of mechanical lubricators

A.the cylinder cover B.the piston rings C.the piston crown D.the piston skirt注 润滑油通过机械式的注油器供应到气缸壁和活塞环。B

38.The ____ of the lubricant should be sufficient to hold the film together, but it

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should allow the lubricant to flow easily.

A.specific gravity B.viscosity C.acid value D.calorific value 注 润滑剂的黏度应足够高以维持油膜但也不能过高要保证它能自由流动。B

39.The crank chamber oil_____. A.can be recovered

B.is only supplied to cylinder C.only feeds the main bearing D.is a kind of detergent

注 曲柄箱油是可回收的 A

40.The film of oil between the rings and the liner is not only essential for the

lubrication but also plays an important part in achieving ____.

A.an oil seal B.removing heat C.a gas seal D.cooling the piston 注 活塞环和缸套之间的油膜不仅对润滑很重要，而且在实现气封方面起到很重要的作用。C

41.The main function of the lubrication system is to enable ____ of a film of oil

between the moving parts.

A.The information B.The formation C.The scatter(分散) D.The friction 注 滑油系统的主要功能是在运动部件之间形成油膜。B

42. Which of the following will be the function of lubricating oil used in marine

engines?

A.To remove heat from oil cooled pistons. B.To wash away wear detritus. C.To neutralize acidic products. D.All of the above.

注 船用柴油机的滑油起多方面的作用，如带走热量、清除磨屑、中和酸性物等。D

43.The lube oil to lubricate the surfaces of the cylinder liners is spread over by the

____.

A.sliding(滑动的)piston rings B.engine's camshaft

C.small pumps D.forced feed system 注 润滑缸套表面的滑油是由滑动的活塞环来布油的。A

44.Which of the following methods is normally used to lubricate bearings in a small

high,speed diesel engine?

A.Splash lubrication. B.Pressure lubrication. C.Sight feed lubricators(可视注油器) D.Mechanical lubricators.

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注 小型高速柴油机的轴承往往采用压力润滑。B

45.Two important considerations for the proper lubrication of a diesel engine include,

the delivery of the oil in sufficient amount, and the ____.

A.cetane number B.pour point C.viscosity temperature D.quality of the oil 注 柴油机润滑泊应满足两个基本要求，即足够的数量和好的质量。D

46.The lube oil pump used ina diesel engine is a ____.

A.volute pump B.centrifugal pump C.diaphragm pump D.gear pump 注 柴油机中的滑油泵一般采用齿轮泵，或浸没式离心泵。D

47.With respect to the flow of lubricating oil through a diesel engine, the lube oil

coolers are located after filters in order to ____. A.allow filtration(过滤)of less viscous oil(黏性油) B.decrease the pressure drop across the filter C.improve overall(全部的)filtration D.All of the above.

注 滑油冷却器位于油滤器之后，主要是为了使滤器运行效率更高（温度较高时易过滤净化）。D

48.Passages are drilled in the crankshafts of diesel engines to provide lubricating oil to

the ____.

A.main bearings B.connecting rod bearings C.piston pin bushings D.All of the above.

注 柴油机曲轴内的油槽用来向主轴承、连杆轴承和活塞销套管等提供滑油。D

49. Lubricating systems for diesel engines are usually designed to initially provide

lube oil to the ____ engine.

A.camshaft bearings B.main bearings C.piston crowns D.cylinder walls

注 柴油机润滑系统首先应能向主轴承提供滑油。B

50.On a medium-speed main propulsion diesel engine, the crank-pin or crank journal

bearings receive lubricating oil from ____.

A.a spindle(锭子或主轴)lubricator B.an oiljet(喷射器)

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C.internal splashing D.drilled passages in the crankshaft 注 中速主推进柴油机，曲柄销轴承是由曲轴内钻孔的油槽供油的。D

51.Cylinder lubrication oil for low speed main propulsion diesel engines is admitted to

each cylinder during ____.

A.the power stroke B.the compression stroke C.low load operation only D.periods of standby 注 低速主推进柴油机，气缸油是在压缩冲程期间进入的。B

52. For diesel engine piston cooling, lubricating oil can be supplied to the pistons by

a(an) ____.

A.oil spray B.oil bath

C.oil control rings D.drilled passage through the camshaft 注 对于柴油机活塞冷却，滑油可通过飞溅式供应到活塞。A

53.A magnetic strainer is used in the diesel engine reduction gear oil system to remove

small particles of ____？

A.water B.babbitt(巴比合金) C.iron or steel D.acids 注 柴油机减速齿轮箱油系统中，磁性滤器用来去除铁屑等。C

54.In a bypass type lubrication system for a diesel engine, the dirty oil line to the

centrifuge should be taken from the ____.

A.lube oil pump suction Iine B.lube oil pump discharge line C.bottom of the lube oil sump D.outlet from the lube oil heater 注 在柴油机旁通式润滑系统中，通向分油机的脏油管路应来自油底壳的底部。C

55. A diesel engine piston ring face is in direct contact with the ____.

A.top of the ring groove B.cylinder liner oil film C.bottom of the ring groove D.back of the ring groove 注 柴油机活塞环的表面直接与缸套的油膜接触。B

56.Dirt should not b8 allowed to contaminate a grease lubricant because the ____.

A.dirt will cause corrosion of bearing B.bearings will leak oil excessively

C.dirt is very abrasive(研磨的)when mixed with grease

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D.grease will become inflammable

注 污物与油脂混合后，会产生很大的磨损作用，因此应防止油脂被污物污染。C

57. Which of the processes listed consumes the greatest amount of power while

producing the greatest amount of heat?

A.Overcoming sliding friction(滑动摩擦). B.Overcoming rolling friction. C.Overcoming fluid friction.

D.Overcoming oil wedge(楔入) friction.

注 克服滑动摩擦需要消耗最大的功，同时产生最多的热量。A

58. The function of lubricating oil is to ____.

A.reduce friction between moving surfaces B.provide even distribution of bearing wear

C.reduce the accumulation of harmful detergents

D.maintain a constant oil temperature output at each bearing 注 滑油的作用是减少运动部件之间的摩擦。A

59. A ____ sometimes called filters，is a device designed to prevent the passage of

unwanted solids into the system.

A.steam trap B.check valve C.separator D.strainer

注 “stainer”和“filter”都是滤器，但严格地说，前者是粗滤器，后者是细滤器，它们都能阻止外界颗粒物进入到系统。D

60.Two main lubricating oil pumps are usual and are obligatory in ____.

A.container ships B.bulk carriers C.passenger ships D.barges 注 船上通常有两台主润滑油泵，但在客轮上是强制性的。C

61.The cylinder oil will have to neutralize the acidic products of combustion and have

good ____ properties to keep the metal surfaces clean.

A.detergent B.de-oiling C.defrosting D.demulsifying 注 具有清洁作用的添加剂用来保持金属表面清洁。A

62. As for turbine oil, contact with water in the form of steam will be inevitable so

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