海事局第1期海船船员适任证书全国统考试题(总第30期)科目：轮机英语试卷代号：801

中华人民共和国海事局

2003年第1期海船船员适任证书全国统考试题（总第30期）

科目：轮机英语试卷代号：801

适用对象：无限、近洋航区3000KW及以上船舶轮机长

（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68题，每题1分，第69题至76题，每题1.5分,第77题至78题, 每题10分。

一、单项选择题：

1. The cylinder head, cylinder liner and form the combustion chamber .

A. frame

B. piston

C. crankcase

D. explosion plate

2. A diesel engine burns a gasoline engine of the same capacity in the same period of

time.

A. as much fuel as

B. less fuel than

C. less fuel as

D. more fuel than

3. Acid solution in the system can be tested from time to time by putting some on to a piece

of lime .

A. strength

B. dense

C. percentage

D. velocity

4. A : Please tell me the specifications and quantity . B : .

A. Pump diesel oil first

B. 300 tons of 180 cst fuel oil

C. The figure is all right

D. OK, I'll sign it

5. 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

6. The tendency for lubricating oil to thin out at high temperatures and thicken at low temperatures will

be characterized by a .

A. low viscosity index

B. high viscosity index

C. high neutralization number

D. low demulsibility quality

7. Operating a diesel engine for prolonged periods, with a closed freshwater cooling system, at

temperatures lower than the normal design temperature can cause.

A. the formation of sulfuric acid

B. a decrease in lube oil viscosity

C. a decrease in cooling water pH

D. a thermostat failure

8. 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

9. 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

10. A sealing arrangement is provided at of the tail-shaft with the propeller and cone

completing the arrangement.

A. both ends

B. neither end

C. the outboard end

D. either end

11. The linear motion of a diesel engine piston is converted to the rotary motion required to drive gears,

propeller shafts, and generators by the.

A. flywheel

B. crankshaft

C. journal bearings

D. camshaft 12. The use of a poor quality piston cooling oil can lead to rapid deterioration of its properties with the

resultant formation of deposits in the piston crown which in turn results in a considerable

in heat transfer.

A. advantage

B. superior

C. increase

D. reduction

13. We should not start the engine unless the turning gear is .

A. on

B. disengaged

C. bolted

D. unscrewed

14. The ability of the governor to prevent fluctuations in engine speed is termed

A. sensitivity

B. stability

C. promptness

D. speed droop

15. A governor automatically controls engine speed by regulating .

A. fuel supply

B. firing order

C. engine load

D. oil level

16. It is relatively to drive the compressor directly from the engine by chain/or other

mechanism because some of the additional power is absorbed .

A. economical

B. expensive

C. inexpensive

D. loss

17. Load control on a diesel engine is accomplished by .

A. regulating the speed of the turbocharger

B. rotating the fuel injector pump plunger

C. regulating the speed of the fuel oil transfer pump

D. changing engine timing

18. , the following possible causes should be investigated .

A. Should the engine stop without apparent reason

B. The engine should stop without apparent reason

C. The engine stops without apparent reason

D. The engine is stopped without apparent reason

19. To operate a centrifugal fire pump at reduced capacity, you should .

A. readjust the relief valve

B. throttle the suction line

C. throttle the discharge valve

D. open the priming line

20. If you were operating a centrifugal water service pump with worn wearing rings, the

A. pump would be very noisy

B. pump would vibrate excessively

C. pump would develop insufficient flow

D. stuffing box would leak excessively

21. Which bearing half will receive the greatest load in a two-stroke/cycle diesel engine?

A. Lower half of the connecting rod bearing at the crankshaft end of the rod.

B. Upper half of the main bearing.

C. Lower half of the cross-head pin bearing in the connecting rod.

D. All bearing halves share an equal load.

22. 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

23. The boiler is fired the demand for steam exceeds that available from exhaust gas heating .

A. whenever

B. however

C. wherever

D. whether

24. In readying an auxiliary water-tube boiler for a routine hydrostatic test, which of the following

procedures should be undertaken prior to filling the boiler with fresh water?

A. The safety valve escape piping should be disconnected from the valve body and a blank

inserted.

B. The boiler vent valves should be opened .

C. All handhole/manhole covers should be tightened up as much as possible to preclude any

leaks.

D. All of the above .

25. The bilge main is arranged to drain any watertight compartment ballast, oil or water tanks

and to discharge the contents overboard.

A. rather than

B. other than

C. in addition that

D. except for

26. When in operation, it is unavoidable that a small amount of oil through leakage, and in

order to compensate for these leaks the system is connected to a feed pump.

A. escapes

B. overheats

C. expands

D. accelerates

27. When reassembling the bowl of a disk-type centrifuge, the bowl or locking ring is rotated

A. clockwise, due to the bowl rotating clockwise

B. clockwise, due to the bowl rotating counterclockwise

C. counterclockwise, due to the bowl rotating clockwise

D. counterclockwise, due to the bowl rotating counterclockwise

28. Under the regulations implementing MARPOL, a mobile offshore drilling unit is required to have

an International Oil Pollution Prevention (IOPP) certificate when the unit

A. is drilling on the Outer Continental Shelf

B. moves to a new drilling location in U.S. waters

C. engages in a voyage to a port of another country which is a party of MARPOL

D. All of the above.

29. The oil sludge is burnt in the onboard. I ' ll show you the ashes

A. boiler

B. main engine

C. auxiliary engine

D. incinerator

30. Among the basic categories of equipment, which of the following are used to convert

mechanical into hydraulic energy?

A. the hydraulic pumps

B. valves

C. hydraulic cylinders

D. hydraulic motors

31. If a radial piston hydraulic pump fails to deliver rated fluid volume, the cause can be

A. contaminated fluid

B. pitted thrust rings

C. worn pintle bearings

D. obstructed suctions passage

32. 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

33. If a heavy sea strikes the, the shock is transmitted through the tiller to the rams .

A. propeller

B. rudder

C. bow thruster

D. stabiliser

34. An AC synchronous transmission type remote steering control system consists of a .

A. transmitter at the steering station and a receiver at the steering engine

B. reversible motor at the steering station geared to the steering pumps

C. small induction motor on the bridge which controls the rudder through pulleys

D. variable displacement hydraulic pump driven by a reversible DC motor

35. A knocking sound from one cylinder of an operating air compressor indicates

A. a defective or broken high pressure un-loader

B. a loose valve plate

C. excessive overload

D. no compression

36. When a flash-type evaporator is to be secured for an extended period of time, the entire unit

should be drained, cleaned, and.

A. completely filled with saltwater

B. filled with de-scaling compound

C. tightly closed to exclude air

D. vented to the atmosphere

37. The compressed air is supplied by to the air reservoirs .

A. compressors

B. forced fans

C. ventilators

D. generators

38. A dirty intercooler on the ship service air compressor will result in

A. decreased compression ratio

B. higher than normal power consumption

C. un-loader malfunction

D. water in the lubricating oil

39. Accidental flooding of the engine room bilges by the bilge main is prevented by

A. stop-check valves installed in the bilge suction manifolds

B. using a positive displacement reciprocating bilge pump

C. installing eductors in all bilge rose boxes

D. installing a swing check before each bilge valve

40. 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 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

41. While troubleshooting a refrigeration system for low head pressure, liquid refrigerant flooding

back from the evaporator is determined to be the cause. It may be necessary to.

A. change the expansion valve adjustment

B. readjust the water regulating valve to increase the flow of water

C. purge air from the condenser

D. clean the waterside of the condenser

42. When adding oil to a refrigeration system, precautions must be taken to ensure that .

A. the compressor suction pressure is not too high

B. all air is purged from the pump and charging fittings

C. the high pressure cutout switch is held open to prevent accidental starting

D. the condenser is completely shutdown first

43. Your assigned emergency stations aboard your vessel can be found on the ship's.

A. muster list

B. certificate of inspection

C. clearance papers

D. permit to proceed

44. If the fire goes out in an automatically fired auxiliary boiler and the burner continues to supply

fuel, there is a potential danger of .

A. overpressure and dry firing

B. a severe furnace explosion

C. spalling damage to the brickwork

D. heat damage to the atomizer

45. The is a measure of the phase difference between voltage and current and is expected as the 56.

cosine of phase angle.

A. power

B. efficiency

C. effective power

D. power factor

46. 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 57.

47. When working on a high voltage circuit, you should always have another person present with you.

This person should have a good working knowledge of .

A. the circuit being worked on and the location of all switches and circuit breakers controlling it

B. first-aid techniques for treating electrical shock

C. cardiopulmonary resuscitation (CPR)

58

D. All of the above .

48. 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 'off going' generator .

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

49. The operating medium for control systems may be .

A. compressed air

B. hydraulic oil

C. electricity

D. All of the above .

50. Loss of lubricating oil pressure to the main propulsion diesel engine will actuate a/an

A. overspeed trip

B. audible/visual alarm

C. the ships/boats general alarm

D. reserve oil storage tank

51. 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

52. Electric insulation is made of organic substances and so gradually with age .

A. deteriorates

B. increases

C. are fouled

D. becomes better

53. While on watch in the engine room, you hear a continuous sounding of the fire alarm. Which of the

following actions should you take?

A. Make an entry in the official logbook .

B. Open the master control valves on the fixed CO 2 system.

C. Start the fire pump and check discharge pressure.

D. Secure auxiliary condenser overboard discharge .

54. After the trouble of the automatic control system has been completely eliminated, assistance is

required.

A. remained

B. still

C. no longer

D. much more

55. A circuit breaker differs from a fuse in that a circuit breaker

A. melts and must be replaced

B. is enclosed in a tube of insulating material with metal ferrules at each end

C. gives no visual indication of having opened the circuit

D. trips to break the circuit and may be reset

Ambient temperature is the.

A. amount of temperature rise with no load

B. temperature of the compartment where the motor is located

C. normal operating temperature, less the room temperature

D. amount of temperature developed by an operating moto Which of the following statements represents the main difference between a relay and a contactor?

A. Contactors control current and relays control voltage .

B. A relay is series connected and a contactor is parallel connected .

C. Contactors can handle heavier loads than relays.

D. Contactors are made from silver and relays are made from copper .

The pressure difference before and after the lube oil filter indicates the filter should be

cleaned.

A. when

B. how

C. where

D. whether

In order to ensure the safety of the ship and its equipment during UMS operation, certain essential functions. A. must be provided B. may be provided C. have provided D. can be provided In the engine department, the is looked upon to provide the leadership that is needed .

A. captain

B. chief engineer

C. chief officer

D. chief motorman

Duty officer informs us that the vessel is ou t of harbor and in " Full Ahead ” .We are going to run

A. diesel oil instead of fuel oil

B. fuel oil instead of diesel oil

C. diesel oil instead fuel oil

D. fuel oil instead diesel oil

We still do not know .

A. where is the trouble

B. where does the trouble

C. where the trouble is

D. what is the trouble

The order " Bow thrust stop. " means ""

A. Bow thrust full to port

B. Bow thrust full to starboard

C. No bow thrust revolutions

D. No stern thrust revolutions

Under the provisions of applicable international conventions, ships entitled to fly the flag of a Party are subject, while in the port of a Party, to control by officers duly authorized by the Party . Ships of non-parties or below convention size shall be given .

A. more favorable treatment

B. less favorable treatment

C. no more favorable treatment

D. the most favorable treatment

may have two emergency source of power, thus requiring two emergency switchboards .

A. Large passenger vessels

B. General cargo ships

C. Container ships

D. Oil tankers

With regards to a diesel engine crankcase explosion, the most violent is the .

I. primary explosion II . secondary explosion

A. I only

B. II only

C. both I and II

D. neither I or II

A certificate , called a(an),should be issued to a ship by the Administration .

A. ISM

B. DOC

C. SMC

D. PS

59.

60.

61.

62.

63.

64.

65.

66.

67.

68. When making entries in the Oil Record Book, the date, operational code, and item number shall be

inserted in the appropriate columns. Furthermore, the required particulars shall be .

A. recorded only for accidental oil discharges

B. recorded only for operations involving discharge of oily waste

C. signed by the oiler who enters them in the Oil Record Book

D. recorded chronologically in the blank space

二、关联题（每组关联题题干下有4个小题，每小题4个选项）

第一组：Please carefully read the following table and then answer the questions according to the information from this table.

A. solid materials

B. liquid materials

C. petroleum gas

D. electrical equipment

70. Which type of fire extinguishers can be used to extinguish all classes of fires?

A. soda

B. water

C. foam

D. dry powder

71. There is one type of fire extinguisher which is injected directly at base of fire making use of gas

that can not be used in accommodation. Which one is it?

A. water

B. foam

C. CO2

D. dry powder

72. When used to extinguish class B fire, extinguisher should be turned upside down and cover fire

smoothly.

A. a soda and acid

B. a foam

C. a CO2

D. a dry powder

第二组

Where routine maintenance is concerned, the governor should be checked regularly for adequate lubrication. The operating range is usually quite small, giving a tendency for them to wear over limited areas. Then a sudden and larger change in speed than normal may carry the governor onto a ridge of debris or gummy oil deposit so that it may stick at that point. To restrict this problem as far as possible, the governor pivots, slide, etc. should be cleaned and well lubricated whenever possible. It should be born in mind that the governor structure is such that, were the spring to fracture in any way, the flyweights would be able to move outwards shut the engine down. The connections from the governor to the fuel racks should be designed in such a way that the governor can both increase and decrease the fuel within the bounds of some hand setting; i.e. the governor can adjus fuel settings but cannot release more fuel to the engine than is dictated by some predetermined value set by the engin operator.

To overcome the above limitations of the CF governor, 'servo governors ' have been devel These use the power of hydraulics to pump the heavier fuel rack systems associated with larger engines into the de position. This 'powered ' operation is rapidly and accurately achieved, and hydraulic flow can be either electrically or mechanically controlled. The speed sensing can be done by a tachom arrangement that can be set to the desired speed, and on sensing any variation a solenoid operated flow valve a pressurized hydraulic flow into a servo system of pistons/plungers which resets the rack positions. Although this syst quite effective, more mechanically controlled governors are fitted to larger engines. These use the principle of th governor, i.e. fly weights acting against spring pressure, but instead of the slide working directly onto the fuel racks it s regulates the flow of hydraulic fluid to servo pistons controlling the rack positions. this system therefore has the p reliability and sensitivity of the small CF governor and yet develops quite a large governor effort through the hydraulic

73. Which of the following is the reason that the governor discussed sticks?

A. The governor is not sensitive normally.

C. The change of speed is too small .

74. If the spring fractured , .

A. the fly weights would fracture too

C. the operator would set the value

75. The " servo governors " .

A. can produce a large force

B.

C. use flyweights to sense the speed

D.

76. The second paragraph is mainly about

A. hydraulic power

C. advanced governors in stead of CF

governor

三、中译英（共2题，请将答案写在答题纸上）

77. PSC官员在检查机械处所时，如果发现阀手轮丢

失、水和油长期渗漏的迹象或机器底座的延伸性锈蚀，

则说明船舶对系统的维护不能令人满意。如果发现大量

的临时修理，例如管路卡箍和水泥堵漏箱，则表明船舶

不愿意进行永久性修理。

78. 我轮仍在安特卫普港修理主机。新的机座和曲轴已经到船，发动机制造厂的两名代表已经

于10月25日到船组装发动机。一个活塞组件和一个缸套需要换新。发动机将于10月28在原

B. It is because of wear in normal working range

D. All of the above are true.

B. the speed would be greatly increased

D. the fuel would be cut off

are mechanically controlled

All of the following are true.

B. CF governors

D. electrical or mechanical hydraulic flow

Table : types of fire extinguisher

处找正和定位，工程预计还需要七天。

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

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?

轮机英语历年真题43期

中华人民共和国海事局 2007年第2期海船船员适任证书全国统考试题(总第43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.______ the engines, the diesel engine is ______ used engine on board. A. Between/more commonly B. Among/the most commonly C. Between/not more commonly D. Among/ not the most commonly 2.The average pressure exerted on a piston during each power stroke is termed ______. A. indicated horsepower B. mean effective pressure C. exhaust back pressure D. compression pressure 3.The cetane number rates fuels for diesel engines according to its ______. A. antiknock characteristics B. ignition qualities C. rates of vaporization D. viscosity 4.The time between injection and ignition of the fuel is known as ______. A. turbulence lag B. after burning ratio C. pre-ignition lag D. ignition delay 5.______ controls the fuel oil temperature in order to provide oil at the correct viscosity for combustion. A. The viscosity regulator B. The temperature controller C. The flow meter D. The pressure switch 6.Constant cooling the various components of diesel engine has a number of functions except for ______. A. good lubrication B. low thermal stress C. good mechanical properties D. acid corrosion 7. A device which functions to bring a diesel engine to a full stop to protect it from damage is known as a/an ______. A. torque limiter B. over-speed trip C. over-speed governor D. load limit governor 8.Engine speeds at which resonance can occur are termed ______. A. maximum speeds B. full speeds C. sea speeds D. critical speeds 9.Prolonged operation of a diesel engine with a closed cooling water system at lower than normal designed operating temperatures can ______. A. increase power output B. decrease lube oil viscosity C. eliminate fuel knock D. cause sulfuric acid formation 10.______ on a ship transmits power from the engine to the propeller. A. The automatic control system B. The speed regularly system C. The transmission system D. The compression air system 11.In a _____ boiler the hot gases from the furnace pass through the tubes while the water is on the outside. A. water-tube B. fire-tube C. exhaust gas D. composite 12.The fuel supply system to an automatic auxiliary boiler, will be automatically shutdown if the boiler ______. A.salinity is abnormally B.high steam demand is too high C.feed-water flow is low D.water level is abnormally low 13.The water in a steaming auxiliary boiler should be tested daily for ______. A. dissolved oxygen B. chlorides C. sludge D. dissolved nitrogen 14.Ignition failure in an automatically controlled auxiliary boiler could be caused by ______. A. carbon deposits on the flame scanner B. high fuel oil temperature C. low fuel oil viscosity D. high steam pressure 15.The concentration of total dissolved solids in the water of an auxiliary boiler can increase as a result of ______. A. seawater contamination B. frequent surface blows C. dissolved oxygen de-aeration D. frequent bottom blows

轮机英语试题二十三

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

第46期轮机英语试题

第46期轮机英语试题 一单项选择题 D1. In order to concrol thermal stresses ,some types of modern engines use pistons with __ A heavy wall and intensive cooling B heavy wall and no cooling Cthin wall and no cooling D thin wall and intensive cooling B2. The average pressure exerted on a piston during each power stroke is termed A indicated B ean effective pressure C exhaust back pessure D compression pressure A3. The ignition quality of a diesel fuel is indicated by the___ A cetane number B volatility point C viscosity index Doctane number B4. A piston in a four stroke cycle disesel engine makes four stroke during each __ A crankshaft revolution B mechanical cycle of operation C period of two cobustion cycles D cycle of two events C5. Crankshafts of medium speed engines are _____from a single piece of steel A unusually solid welded B never be solid forged C almost invariably D almost invariably be welded B6 .The starting air entering the cylinder begins when the piston ______ A has nearly come to the TDC B has just past the TDC C has nearly come to the BDC D has just past the BDC D7 .A main bearing consists of two shells which are secured by means of studs and _________ A tie rods B through bolts C lead wires D bearing caps B8 .Compared to four stroke cycle engines ,two ~stroke /cye diesel engines have the disadvantage of ________ A less even torque B higher cylinder head temperatures C fewer power strokes per revolution D greater weight /size requirements A9. _____controls the fuel oil temperature in order to provide oil at the correct viscosity for combustion A The viscosity regulator B The temperature controller C The flow metet DThe pressure switch 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 C11 A large ,low speed ,main propulsion diesel engine uses sea water to directly cool the ________ A cylinder heads B exhaust valves C scavenging air D injectors D12. In a rubocharger ,inlet air velocity is increased in the __________ A inlet nozzle ring B stationary diffuser passages C compressor outlet volute D rotating impeller vanes C13 .Each cylinder has one starting valve which is usually opened by air pressure and closed by _________ A nuts and bolts B new joints C spring force D sealing rings B14. In a simple mechanical governor ,the _________ A centrifugal force rotates the ball-head