轮机英语历年真题40期

中华人民共和国海事局

2006年第2期海船船员适任证书全国统考试题(总第40期)

科目：轮机英语试卷代号：805

适用对象：无限、近洋航区3000KW及以上船舶二/三管轮

（本试卷卷面总分100分，及格分为70分，考试时间为100分钟）

答题说明：请选择一个最合适的答案，并将该答案按答题卡要求，在其相应位置上用2B铅笔涂黑。第1题至74题，每题1分，第75题至78题，每题1.5分,第79题至80题, 每题

10分。

一、单项选择题

1.______usually helps to induce air movement to assist combustion.

A. Cylinder cover

B. Main bearing

C. The exhaust valve

D. The piston movement

2.The mechanical efficiency of an engine is always less than 100% ______losses occurring in the

form of friction.

A. because

B. since

C. due to

D. owing

3.The exhaust ports are located around the lower part of the cylinder liner, ______the products of

combustion are driven by scavenging air.

A. in which

B. by which

C. through which

D. from which

4.The third engineer took the ______and checked the tank table in the office and recorded all relevant

data, as well as calculated the bunkering.

A. water level

B. sump level

C. ballast tank level

D. ship's trim

5.The lubricating pipes and ducts should be blown out with ______.

A. the atmosphere

B. the fresh water

C. the compressed air

D. the chemical compounds

6.______neutralizes the acid conditions and ______cleanses the rings and grooves.

A. The detergency/the alkalinity

B. The alkalinity/the detergency

C. The inhabitant/ the water

D. The additives/the distilled water

7.If the engine does not start on air, it may be due to______.

A. low compression of the fuel pumps

B. incorrect timing of fuel pumps

C. the starting air valves stuck

D. air-locks in fuel oil pipeline

8.______device is provided to prevent starting air from being admitted to the cylinder before the

reversing is completed.

A. An automatic

B. A transmission

C. A self-regulating

D. An interlocking

9. A reduction in load on a diesel engine results in ______of speed of the crankshaft.

A. a reduction

B. an increase

C. an outing

D. a downwards

10.Fuel injection uses the jet pump system and a Woodward type hydraulic ______is used to control

engine speed.

A. controller

B. governor

C. instrument

D. apparatus 11.The overspeeding of the diesel engine driving an electric generator could cause ______.

A. low voltage trip to trip

B. reverse power trip to trip

C. damage to windings

D. excessive exhaust temperatures

12.Any carbon built up on surfaces must be washed away by ______additives and held in suspension

by a ______additive.

A. dispersant /detergent

B. detergent/dispersant

C. dispersant /dispersant

D. detergent/detergent

13.While flowing through the volute in a centrifugal pump, part of the ______energy of the liquid is

converted to ______energy.

A. kinetic/pressure

B. kinetic/essential

C. pressure/kinetic

D. pressure/height

14.Gear pumps are ______because they discharge a near constant amount of liquid regardless of

pressure.

A. negative displacement type

B. turbine type

C. positive displacement type

D. mixed-flow type

15.Operating a rotary pump at speeds in excess of design requirements could cause______.

A. decreased clearances between rotating parts

B. decreased slippage to the suction side of the pump

C. air binding in the discharge ports

D. erosion and excessive wear

16.The fire pumps must be capable of delivering a total quantity of water at a defined head , not less

than______of the total bilge pumping capacity.

A. one-third

B. two-thirds

C. one-fourth

D. two-fourths

17.The bilge system has been performing well; however, the aft starboard engine room bilge-well

suddenly fails to be pumped out. Which of the following should be done first to determine the cause?

A. Open the bilge pump for inspection.

B. Remove each of the manifold valves.

C. Remove only the manifold valve to the affected bilge-well.

D. Attempt to pump out another bilge well to determine if the entire system is affected.

18.Which of the following statements describes one of the functions of the ballast system?

A. To permit flooding of any fuel oil storage tank on any class of ship.

B. To use it as a secondary service system.

C. To store reserve feed or potable water for extended cruises.

D. To stabilize the ship by flooding certain designed tanks with seawater.

19.If an operating auxiliary boiler has a water pH reading of 7, you should ______.

A. bottom blow the boiler

B. treat the water with caustic soda

C. treat the water with chemical scavengers

D. reduce the water alkalinity to recommended readings

20.Where tanks are arranged for either oil or ballast ______must be fitted in the pipeline.

A. a change-over chest

B. a head tank

C. a emergency bilge pump

D. an air cooler

21.The most common cause of scale formation in an auxiliary boiler is ______.

A. concentrations of calcium sulphate in the boiler water

B. fuel oil in the feed water

C. improper treatment of the feed water with calcium sulphate

D. excessive feed water alkalinity

22.The ______of the gravity disc is too big. It cause oil to flow through the water outlet. We changed

the disc and no oil is found in the water outlet.

A. gravity

B. diameter

C. circumference

D. cylinder

23.Oil water separators are used to ensure that ships don't discharge oil when ______bilge water.

A. to pump off

B. being pumped

C. pumping out

D. it pumping out

24. A high rate of separation between oil and water is favored by______.

A. large size of oil globule

B. low temperature

C. high viscosity

D. high flow rate

25.Medium speed engines have a ______power to weight ratio than the slow speed two strokes, but

due to the higher speeds tend to have ______maintenance intervals.

A. higher/reduced

B. higher/increased

C. lower/reduced

D. lower/increased

26.Oil Record Book Part I shall be provided to every oil tanker of 150 tons gross tonnage and above

and every ship of 400 tons gross tonnage and above, ______oil tankers, to record relevant

machinery space operations.

A. as well as

B. as long as

C. rather than

D. other than

27.It is important with all hydraulic systems to ensure that interlocking arrangements provided for

pump or motor control levers are before the pump driving motor can be started.

A. in the port position

B. in the starboard position

C. in the neutral position

D. to be dismantled

28.The hand steering is a method by which the motion of the rudder is controlled with______.

A. a motor-driven steering wheel

B. a pneumatic steering wheel

C. a hand-driven steering wheel

D. an electric steering wheel

29.With reference to operating a four-ram steering gear system under emergency conditions, which

one of the following statements is incorrect ?

A. Only one pump should be used at any time

B. The ship speed should be reduced to 70% of the normal

C. Watch keeping of the steering gear should be increased

D. Limitations of the steering gear should be logged but the bridge need not be informed

30.Which of the following problems can result in below normal pressure in the intercooler of an

operating low pressure air compressor?

A. Defective pressure pilot valve

B. Defective receiver relief valve

C. Leaking intake valves on the high pressure cylinder

D. Leaking discharge valves on the low pressure cylinder

31.The air charge leaving an intercooler, or after-cooler of an air compressor can be expected to be

______.

A. superheated

B. super-cooled

C. at or below the dew point

D. all of the above

32.Open the ______of inter cooler before starting an air compressor.

A. cylinder cover

B. cooling water

C. oil cup

D. drain valve

33.Sludge may form in the crankcase of an air conditioning compressor as a result of______.

A. bubbling refrigerant

B. overheating and oxidation

C. lowered operating temperatures

D. reducing the cloud or flash point 34.If a refrigeration system were short of refrigerant, the condition would result in ______.

A. continuous running of the compressor

B. high suction pressure

C. high discharge pressure

D. short cycling of the compressor on the water failure switch

35.Which of the statements listed concerning heat transfer is correct?

A. Heat is always transferred at a constant rate.

B. Heat transfer rate increases as temperature difference increases.

C. The rate of heat transfer is not affected by temperature difference.

D. The high temperature region is known as a heat sink.

36.The purpose of the low pressure cutout switch is to______.

A. maintain liquid refrigerant at the suction of the compressor

B. maintain a preset suction pressure to the compressor

C. start and stop the compressor at preset operating pressures

D. operate at minimum efficiency

37.When a refrigeration compressor is in the 'off' cycle, the thermal expansion valve will______.

A. always be wide open when the compressor restarts

B. continue to operate as if the system were in operation

C. remain open until evaporator pressure equalizes, then close until the compressor restarts

D. always be completely closed until the compressor restarts

38.The star formation is most commonly used and requires ______on the alternator.

A. one slip-ring

B. two sliprings

C. three sliprings

D. four sliprings

39. A constant output voltage from an AC generator is maintained by the ______.

A. prime mover governor

B. exciter generator

C. voltage regulator

D. reverse power relay

40.Prior to any overhaul work on electric equipment, it is important to ensure the circuits are______.

A. live

B. dead

C. excited

D. on line

41.Which of the following should be the FIRST step in removing a generator from parallel operation?

A. Trip the generator off the switchboard.

B. Turn off all electrical equipment.

C. Remove the load from the … offgoing' generator.

D. Increase the cycles of the generator staying on the line.

42. A … dead front' switchboa rd is one ______.

A. without switches on it

B. with insulated switches and no exposed terminals

C. without circuit breakers

D. without safety hand rails nor rubber mats

43.In ______the control action is independent on the output.

A. a closed loop control system

B. an open loop control system

C. a boiler control system

D. a steering gear automatic control system

44.Every precaution must be taken to avoid ______.

A. sparking being taking place

B. to spark taking place

C. sparking to be taken place

D. sparking taking place

45.The ______is used to measure the volume of a liquid or gas through a pipeline within any given

period of time.

A. flowmeter

B. viscometer

C. micrometer

D. feeler

46. A salinity indicator is used to determine the ______.

A. cause of salt contamination

B. location of salt water contamination

C. chemical makeup of feed-water

D. level of alkalinity in condensate

47.In order to accurately measure very low pressures, which of the instruments listed should be used?

A. Compound gage

B. Bourdon tube

C. Manometer

D. Deadweight gage

48. A circuit breaker and a fuse have a basic similarity in that they both ______.

A. can be reset to energize the circuit

B. should open the circuit when overloaded

C. will burn out when an over current flow develops

D. all of the above

49.The main difference between a motor control circuit containing low voltage protection and low

voltage release is that the latter contains______.

A. a magnetic operating coil

B. normally open line contacts

C. thermal-overload protection

D. a momentary-contact start button

50.If the engine ______for a long period, there will be a danger of frost.

A. must stand inoperative

B. has to stand inoperative

C. must be stood idle

D. will stand idle

51.If fuel injection to a four-stroke/cycle diesel engine begins earlier than designed, ignition may be

delayed because the ______.

A. cylinder compression pressure may not be high enough

B. cylinder compression temperature may be too high

C. fuel oil injection pressure may not be high enough

D. scavenge and purge process is incomplete

52.Improper cooling of a diesel engine cylinder liner due to the accumulation of scale deposits, may

cause______.

A. low compression pressure

B. increased piston wear

C. increased cylinder lube oil consumption

D. poor contact between compression rings and liner

53.Poor combustion in a diesel engine can be caused by______.

A. high compression pressure

B. low intake air temperature

C. low exhaust pressure

D. high scavenge air temperature

54.High exhaust temperature and black smoke exhausting from an auxiliary diesel engine can be

caused by ______.

A. engine overload

B. low combustion temperature

C. plugged fuel nozzle holes

D. excessive compression pressure

55.In a diesel engine, excessive cylinder liner wear will cause ______.

I. increased blow-by II. wear between the piston ring and groove

A. I only is correct

B. II only is correct

C. both I and II are correct

D. neither I or II are correct https://www.sodocs.net/doc/7815921578.html,bustion knock can occur in the cylinders of a diesel engine under any condition permitting

______.

A. a shortened ignition delay period

B. a lean fuel/air mixture

C. excess fuel in the combustion chamber

D. rapid vaporization of injected fuel droplets

57.The load on the crosshead pin is always______, so it is the ______half of the bearing which is

subject to wear.

A. upwards/top

B. upwards/bottom

C. downwards/top

D. downwards/bottom

58.If the action of the engine indicates that some of the cylinders are not firing, the ones affected may

be determined by watching ______.

A. the bad smoke

B. the smoky exhaust

C. the exhaust temperature

D. the peak pressure

59. A centrifugal pump can?t supply water after starting. You should firstly check ______.

A. discharge valve

B. power supply

C. packing gland

D. bearing lubrication

60.Which of the motors for the devices listed below is fitted with an instantaneous(瞬时的) overload

relay?

A. Fan

B. Pump

C. Winch

D. Machine tool

61.If ______are taken at regular intervals, any unequal distribution of load will be easily found out.

A. indicator diagrams

B. nomo-gram

C. temperature readings

D. pressure readings

62.Oil mist detectors are usually used on board to detect oil mist density within ______.

A. the engine crankcase

B. the engine scavenge boxes

C. drain tanks

D. fuel tanks

63.The resistance of electric wire will decrease as its ______.

A. length increases

B. cross-sectional area increases

C. temperature increases

D. percent of metallic purities increases

64.It is well known that the whole power distribution of the ship?s electrical services mainly depend on

the______.

A. sub-boards

B. main switchboards

C. emergency switchboards

D. distribution boards

65.The Company should ensure that ______documents are promptly removed.

A. absolute

B. updated

C. outdated

D. new

66.You may improve a vessel's stability by ______.

A. keeping the fuel tanks topped off

B. increasing the free surface effect

C. keeping the fuel tanks at least half full

D. keeping at least one fuel tank empty for slops

67.The most common type of containment device for spilled oil on the water is the use of ______.

A. straw

B. booms

C. skimmers

D. chemical dispersants

68.W e?ve tried many ways, but all in vain. Only in this way, ______the problem, I?m sure.

A. can we solve

B. we can solve

C. we will solve

D. can be solved

69.It was ______midnight that we removed the trouble and went back to our cabins.

A. until

B. not until

C. not before

D. not after

70.The flash point of a petroleum product is an indication of its______.

A. viscosity

B. pour point

C. volatility

D. lower explosive limit

71.If there has been a fire in a closed unventilated compartment it may be unsafe to enter because of

______.

A. unburned carbon particles

B. excess nitrogen

C. a lack of oxygen

D. excess hydrogen

72.Tell your men ______the rules and procedures of working when dismantling the equipment.

A. not to go against

B. don?t go against

C. not go to against

D. to not go against

73.The minimum number and capacity of bilge pumps and fire pumps and their distributing within the

ship is governed by______.

A. Classification Society Rules

B. National requirements

C. The IMO International Convention for the Safety of Life at Sea

D. All of the above.

74.The SOLAS Convention in its successive forms is generally regarded as the most important of all

international treaties concerning the ______of merchant ships.

A. pollution

B. economization

C. safety

D. efficiency

二. 关联题（关联题题干下有4个小题，每小题4个选项）

The windlass is the usual anchor-handling device where one machine may be used to handle both anchors. A more recent development, particular on larger vessels, is the split windlass where one machine is used for each anchor.

The rotating units of a split windlass consist of a cable lifter with shaped snug to grip the anchor cable, a mooring drum for paying out or letting go of mooring wires and a warp end for warping duties. Each of these units may be separately engaged or disengaged by means of a dog clutch,

although the warp end is often driven in association with mooring drum. A spur gear assembly

transmits the motor drive to the shaft where the various dog clutches enable the power take-off.

Separate band brakes are fitted to hold the cable lifter and the mooring drum when the power is switched off.

The cable lifter unit is mounted so as to raise and lower the cable from the spurling pipe, which is at the top and the chain or cable locker.

Anchor capstans are used in some installations where the cable lifter rotates about a vertical axis.

Only the cable lifter unit is located on deck, the driving machinery being on the deck below.

75.According to the passage, the rotating units of a split windlass don?t include______.

A. a cable lifter

B. a mooring drum

C. a chain locker

D. a warp end

76.The word “assembly” in the sentence “ A spur gea r assembly transmits the motor drive to the shaft

where the various dog clutches enable the power take-off.” is as the same meaning as ______.

A. unit

B. shaft

C. dog clutch

D. spurling pipe

77.One of the functions of a dog clutch is ______.

A. to transmit the motor drive to the shaft

B. to hold the cable lifter and the mooring drum when the power is switched off

C. to engage or disengage the rotating units of a split windlass separately

D. to handle both anchors 78.Which of the following statements is correct ?

A. A more recently development, particularly on larger vessels, is the split windlass where one

machine is used to handle both anchors.

B. The word “machine” in the passage refers to the windlass.

C. Anchor capstans are used in some installation where the cable lifter rotates about a horizontal

axis.

D. Both the cable lifter unit and the driving machinery are located on deck.

三、中译英（共2题，请将答案写在答题纸上）

79. （修理单）辅助锅炉水空间需采用化学方法除去水垢，如发现有烧坏的管子则换新，安全释

放阀调至设定值。

80. （轮机日志）NO.1空压机进行了解体、清洁、检查，更换了断裂的排气阀，装复后进行了

试验。

期数：40 试卷代号：805

第47期轮机英语

47期轮机英语考试题目 一单项选择题 A1.The___ engine is used for alternators and some times for main propulsion provide a propeller of between 90 to 120 rpm. A.four-stroke B.two-stroke. C.slow speed D.reversible B2.The abbreviation”MIP”stands for____, A.middle indicating pressure B.mean indicated pressure C.mean pitch D.middle indicated power D3.The cetane number of a diesel fuel oil indicates its____. A.viscosity B.acid content C.heating value D.ignition quality C4.In a two-stroke engine the camshaft rotates at___the enging rotational speed. A.half B.twice C.the same speed as D.four times D5.A diesel enging is similar to a gasoline engine except that the former has no ____. A.cross-head B.cylinder C.connecting rod D.spark plug C6.It is easier to replace a dry cylinder liner than a wet one because____. A.of the thin wall thickedss B.honing makes it easier to maintain the desired oil film C.water seals are not required D.it fits more loosely due to a decrease in heat transfer through the composite wall D7.A main bearing consists of two shells which are secured by means of studs and____. A.tie rods B.though bolts C.lead wires D.bearing caps C8.However fast or slow the combustion rate,it is still a____between carbon,hydrogen,sulph and oxygen that releases heat. A.physical deformation B.state exchange C.chemical reaction D.coalescence A9.During the fuel injection period,fuel pressure must exceed cylinder gas pressure to____. A.ensure penetration and distribution of the fuel in the combustion chamber B.ensure the needle valves is flushed clean duringeach injection C.prevent combustion gas blowback into the open needle valve Dprevent reflected pressure waves when the neddle valve close. B10.In a diesel engine lube oil system ,which of the following parts should be lubricated first? A.Camshaft bearings B.Main bearings C.Piston crowns D.Cylinder walls B11.In a diesel engine closed freshwater cooling system,the amount of coolant flowing through the heat exchanger is controlled by the _____, A.suction pressure regulator B.thermostatic bypass valve C.sea water temperature D.water level in the expansion tank

轮机大管轮英语真题48期

中华人民共和国海事局 2009年第5期海船船员适任证书全国统考试题(总第48期) 科目：轮机英语试卷代号：803 适用对象：无限、近洋航区3000KW及以上船舶大管轮 （本试卷卷面总分100分，及格分为70分，考试时间为100分钟） 答题说明：请选择一个最合适的答案，并将该答案按答题卡要求，在其相应位置上用2B铅笔涂黑。第1题至82题，每题1分，第83题至94题，每题1.5分。 一、单项选择题： 1. The reason why more and more of the large merchant vessels are being powered by medium-speed diesel engines is . A. they operate between 150 and 450 rpm B. they are connected to the propeller by gearing C. their smaller size and weight D. they can be connected directly to the propeller without gearing 2. The closing of the exhaust valves used on a modern, large, low-speed, main propulsion diesel engine may be directly provided by . A. large conical springs B. compressed air pressure C. hydraulic pressure D. exhaust gas pressure 3. One of the factors limiting the amount of toad which can be put on a modem marine diesel engine is the . A. governor sensitivity B. exhaust temperature C. fuel injection pressure D. speed of the cam shaft 4. The desirable properties or a marine fuel oil should inc lude . A. high flash point and high viscosity B. low flash point and high viscosity C. low heating value and high sulphur content D. high heating value and low sulphur content 5. As the plunger moves upwards in the barrel, injection will commence once the plunger bas the spill ports and the pressure builds up. A. opened up B. closed off C. lined up D. taken off 6. In an auxiliary diesel engine bypass type lubricating oil system, the main lube oil pump forces . A. all of the oil used by the engine through a filter B. some of the oil used by the engine through a filter C. some of the oil used by the engine through a centrifuge D. all of the oil used by the engine through a centrifuge 7. Because the circulating water is in a closed loop, is installed to cater for expansion and contraction of the water at different conditions of operation. A. an expansion joint B. a drain tank C. a head tank D. a contraction tank 8. The high air velocity leaving the compressor of an exhaust gas turbocharger is converted to pressure in the . A. inlet nozzle ring B. turbine wheel blade C. diffuser passages D. inlet volute 9. is usually driven by the engine camshaft and supplies pilot air to the cylinder air start valve. A. An air receiver B. An operating valve C. An automatic valve D. An air distributor 10. Diesel engines driving alternators operating in parallel must maintain a set frequency regardless of load changes. The governor characteristic used to accomplish this is known as . A. actuation B. sensitivity C. compensation D. promptness 11. By comparing the exhaust gas temperature of each cylinder, the operator can determine if the load is balanced throughout the engine. The device most commonly used is a . A. tachometer B. pyrometer C. dynamometer D. calorimeter 12. When the ship is going to enter into the harbor, ____. A. change from heavy fuel oil to diesel oil for main engine B. pumping out bilge water C. change sea chest from high level one to lower level one D. test emergency generator 13. If the jacket water temperature rises rapidly above normal in a diesel engine, you should first . A. place standby cooler in operation B. reduce engine toad C. check thermostatic valve D. clean sea water strainer 14. Air cocks, usually positioned at the in a circulating system, is used to get rid of the air in the system. A. bending joint B. expansion tank C. weld D. the highest point 15. Which of the following conditions could contribute to the cracking of a diesel engine cylinder head? A. Leaking seal ring B. Insufficient heat transfer from the exhaust valves C. Blocked cooling water passages to the head D. Excessive scavenging air provided to the engine 16. of an engine crankshaft can be detected by measuring deflections of' crank webs for each unit of the engine. A. Misalignment B. Length C. Strength D. Stresses 17. can be a direct cause of faulty operation of diesel engine fuel injection nozzles. A. Excessive fuel nozzle holder cooling B. Sediment in the fuel supply C. Distortion of the fuel spray pattern D. Improper atomization of the fuel 18. When fuel is injected late into a diesel engine cylinder . A. the exhaust will be clear B. fuel consumption will be low C. all the fuel will be burned at top dead center D. fuel consumption will be high 19. A large change in ambient temperature, or using an oil of a viscosity different than the one recommended by the manufacturer in a mechanical hydraulic governor, will result m the need to adjust the . A. pilot valve opening B. compensating needle valve C. compensating spring tension D. accumulator spring tension 20. Which of the following factors tends to increase scale formation on the saltwater side of a heat exchanger used in a diesel engine cooling water system? A. Baffle plates that have been bent during prior removal. B. Leaks m the cooler tube nest. C. Operating the engine while maintaining a high sea water outlet temperature. D. A punctured sea water strainer supplying cooling water to the heat exchanger. 21. If the scavenge fire is of a more major nature, if there is a risk of the fire extending or if the scavenge trunk is adjacent to the crankcase with risk of a hot spot developing it sometimes becomes necessary to the engine. A. stop B. start C. speed up D. slow down 22. In an operating diesel engine, which of the following conditions is an indication of a leaking air starting valve?

三管轮轮机英语大证考试真题41期

中华人民共和国海事局 2006年第3期海船船员适任证书全国统考试题(总第41期) 科目：轮机英语试卷代号：805 适用对象：无限、近洋航区3000KW及以上船舶二/三管轮 （本试卷卷面总分100分，及格分为70分，考试时间为100分钟） 答题说明：请选择一个最合适的答案，并将该答案按答题卡要求，在其相应位置上用2B铅笔涂黑。第1题至74题，每题1分，第75题至78题，每题1.5分,第79题至80题, 每题10分。 一、单项选择题 1. A diesel engine is similar to a gasoline engine except that the former has no ______. A. cross-head B. spark plug C. connecting rod D. cylinder 2. A diesel engine which is rated for normal operation at a crankshaft speed of 800 RPM, is commonly classed as a ______. A. slow-speed diesel B. medium-speed diesel C. high-speed diesel D. constant-speed diesel 3.Which of the diesel engine components listed increases air density and helps to improve engine operating efficiency? A. Impeller B. Compressor C. After-cooler D. Exhaust diffuser 4.For a given size engine, the two-stroke/cycle diesel engine will deliver more power than a four- stroke/cycle diesel engine because ______. A. it has a longer power stroke B. more air gets into the cylinder each stroke C. it develops twice as many power strokes at the same speed D. higher combustion pressure is developed 5.The intake valves in a diesel engine are reseated by ______. A. cam followers B. push rods C. combustion gases D. valve springs 6.According to the way the energy of the exhaust gases is utilized, pressure-charging can be divided into two main systems, namely, the constant-pressure system and ______. A. the pulse-phase system B. the pulse Doppler system C. the pulse system D. the pulse interval system 7.An over-speed safety device is usually fitted to a generator engine for______in the event of over- speed. A. cutting power off the engine B. increasing the fuel pump setting C. braking the crankshaft D. stabilizing the ship speed 8.What preventative maintenance should be done frequently to diesel engine starting air receivers? A. Drain the accumulated moisture. B. Test the relief valves. C. Watch the temperature to prevent fluctuations in pressure. D. Clean the interior to remove oil and foreign matter. 9.Immediately after any diesel engine is started, the engineer should check the ______. A. crankcase pressure B. lube oil pressure C. seawater pressure D. exhaust temperature 10. A controllable pitch propeller on a diesel driven vessel eliminates the need for ______. A. friction clutches B. disconnect clutches C. reversing gears D. reduction gears 11.In motor ship, ______is often used to recover some of the heat carried in the exhaust gases from the main engine. A. an diesel oil heater B. a waste heat boiler C. a fresh water generator D. a donkey boiler 12.An exhaust gas bypass is installed on a waste heat boiler in order to ______. A. bypass exhaust gas at high loads to prevent excessive back pressure B. bypass a portion of the exhaust gas at peak loads for better efficiency C. recycle exhaust gas to the turbocharger D. minimize moisture condensation in the boiler gas passages at low loads 13.Prior to lighting off a cold automatically fired auxiliary boiler, you should ______. A. check and regulate the water level B. close the air cock once fires are lit C. blow down the gage glass D. assure protective steam flow 14.Flame failure in an automatically fired auxiliary boiler can mostly result from a/an ______. A. incorrect electrode setting B. incorrect nozzle position C. clogged fuel nozzle D. broken high tension lead 15.Waterside scale in a fire-tube boiler may cause ______. A. increased heat transfer B. fireside erosion C. high steam demand D. overheated tubes 16.Which of the following will be the advantage of a centrifugal pump as compared with a reciprocating pump? I. Its discharge is continuous; II. It has no internal valves; III. Upon accidental closing of discharge valve, excessive pressure will not build up A. I, II B. II, III C. I, II, III D. II only 17.Why are removable sleeves installed on centrifugal pump shafts? A. They make it easier to replace the pump shaft packing. B. They can be economically replaced as they wear out. C. They can be removed when it is necessary to lighten the weight of the pump. D. They increase the strength of the shaft. 18.If one of the bilge system manifold valves does not properly seat, the ______. A. bilge well connected to that valve, plus the second bilge well being pumped will be completely emptied B. bilge system will lose vacuum and prevent the other bilges from being pumped out C. bilge well aft connected to that valve will siphon(虹吸) its contents to the forward bilge wells D. discharge pressure will be too high. 19.Which of the listed statements is correct concerning the starting of centrifugal pumps? A. They should always be started with the discharge valve closed. B. They should always be started with the discharge valve opened. C. A priming pump is always required to flood the impeller suction. D. They should always be started with the sealing line valves closed. 20.The simplest method to use for determining if a centrifugal pump is operating as designed, is to ______. A. closely observe the pump discharge temperature B. close off the discharge valve, and watch for a rise in pressure C. momentarily close off the suction valve, and watch for a rise in pressure D. use a clamp on ammeter and compare the readings to past records

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试题二十三 一、单项选择题： 1.Because the castings of smaller engines are not so big and heavy, ______ and cylinder block may be made in one piece. A. the column B. the jacket C. cylinder cover D. cylinder liner 2.______ of an engine crankshaft can be detected by measuring deflections of crank webs for each unit of the engine. A. Misalignment B. Length C. Strength D. Stresses 3. A common trouble with the fuel pump plungers or fuel valve spindle is______. A. broken down B. stuck C. oil leakage D. carbonized 4.Diesel fuel oil having a low cetane rating can result in ______. A. improved cold weather starting B. smoother engine operation C. combustion knock D. reduce ignition lag 5.______ is arranged for cleaning the lubricating oil in the system and clean oil can be provided from a storage tank. A. A filter B. A centrifuge C. A distiller D. A generator 6.The emulsion of the oil is mainly caused by ______. A. the solid impurities of large particle B. the solid impurities of fine particle C. the water content D. both water and solid impurities 7.Cylinders of marine diesel engines are normally cooled by ______. A. sea water B. fine mineral oil C. sanitary water D. fresh water 8.______ are fitted in the exhaust system and facilitate charge removal and scavenging in each cylinder. A. Diffusers B. Compressors C. Steam boilers D. Soot blowers 9.______ device is provided to prevent starting air from being admitted to the cylinder before the reversing is completed. A. An automatic B. A transmission C. A self-regulating D. An interlocking 10.The difference between a supercharged engine and an un-supercharged engine is that ______ operates at an increased pressure. A. the later B. the latter C. the former D. the farmer 11.______ for attachment to the propeller shaft also accommodates the turning gear and is integrally forged with the crankshaft. A. The coupling flange B. The camshaft C. The cross-head pin D. The cylinder jackets 12.A(n) ______is a chemical or electro-chemical attack on the metal surface which may be further increased if the sea-water is polluted. A. errosion B. corrosion C. cavity D. scouring 13.The two-stroke cycle begins with the piston coming up from the bottom of its stroke, with scavenge ports in the sides of the cylinder being ______. A. shut B. closing C. opened D. closed 14.The governor of a generator engine is to ______. A. make the engine stop

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《轮机英语》老题库答案 1. B 2. C 3. B 4. C 5. A 6. A 7. B 8. D 9. A 10. C 11. C 12. D 13. A 14. A 15. A 16. D 17. C 18. A 19. B 20. C 21. C 22. A 23. A 24. C 25. B 26. C 27. C 28. C 29. B 30. B 31. D 32. C 33. A 34. A 35. D 36. A 37. D 38. B 39. C 40. A 41. D 42. B 43. B 44. C 45. D 46. D 47. B 48. A 49. B 50. D 51. A 52. A 53. A 54. B 55. D 56. A 57. C 58. B 59. D 60. B 61. C 62. D 63. D 64. C 65. C 66. D 67. D 68. C 69. C 70. A 71. A 72. C 73. B 74. B 75. D 76. B 77. D 78. B 79. A 80. B 81. D 82. B 83. C 84. A 85. B 86. B 87. B 88. C 89. C 90. A 91. B 92. A 93. D 94. C 95. C 96. C 97. C 98. A 99. D 100. C 101. A 102. D 103. A 104. A 105. D 106. A 107. C 108. D 109. A 110. A 111. D 112. B 113. A 114. B 115. A 116. C 117. C 118. A 119. D 120. B 121. D 122. A 123. D 124. B 125. B 126. B 127. B 128. D 129. D 130. C 131. C 132. A 133. D 134. D 135. A 136. C 137. D 138. C 139. A 140. A 141. C 142. A 143. B 144. B 145. C 146. A 147. D 148. D 149. A 150. C 151. D 152. D 153. B 154. C 155. A 156. B 157. C 158. B 159. B 160. D 161. D 162. C 163. C 164. D 165. A 166. D 167. B 168. B 169. A 170. A 171. D 172. C 173. C 174. A 175. C 176. C 177. C 178. B 179. D 180. B 181. D 182. D 183. B 184. C 185. A 186. B 187. A 188. A 189. A 190. D 191. D 192. D 193. B 194. D 195. D 196. D 197. B 198. C 199. B 200. B 201. A 202. D 203. B 204. C 205. C 206. D 207. A 208. A 209. A 210. D 211. A 212. B 213. B 214. D 215. D 216. D 217. A 218. D 219. D 220. B 221. B 222. D 223. C 224. A 225. D 226. D 227. A 228. C 229. A 230. D 231. B 232. B 233. A 234. B 235. A 236. A 237. D 238. D 239. C 240. A 241. B 242. B 243. C 244. A 245. D 246. A 247. C 248. C 249. D 250. A 251. D 252. A 253. B 254. A 255. A 256. A 257. D 258. A 259. B 260. B 261. B 262. C 263. A 264. A 265. A 266. A 267. C 268. C 269. D 270. C 271. A 272. D 273. C 274. A 275. A 276. A 277. B 278. B 279. D 280. B 281. C 282. A 283. C 284. D 285. A 286. D 287. C 288. D 289. B 290. D 291. C 292. A 293. D 294. B 295. C 296. D 297. A 298. C 299. B 300. A 301. A 302. A 303. A 304. A 305. C 306. D 307. C 308. B 309. C 310. B 311. B 312. A 313. C 314. C 315. B 316. A 317. A 318. A 319. D 320. C 321. C 322. C 323. D 324. B 325. A 326. A 327. C 328. C 329. A 330. A 331. B 332. B 333. D 334. B 335. C 336. D 337. C 338. C 339. B 340. A 341. B 342. B 343. B 344. B 345. D 346. B 347. D 348. D 349. D 350. B 351. D 352. D 353. A 354. A 355. A 356. A 357. C 358. A 359. C 360. B 361. B 362. C 363. B 364. B 365. A 366. B 367. D 368. A 369. A 370. C 371. B 372. A 373. B 374. A 375. B 376. A 377. B 378. D 379. A 380. D 381. A 382. B 383. D 384. A 385. C 386. B 387. D 388. B 389. C 390. B 391. A 392. B 393. B 394. C 395. A 396. B 397. A 398. D 399. C 400. B 401. A 402. B 403. A 404. C 405. B 406. A 407. D 408. C 409. C 410. A 411. C 412. C 413. B 414. A 415. B 416. B 417. D 418. A 419. C 420. C