1002级轮机英语期末考试B

1002级轮机英语期末考试（B）

考试班级：1002轮机2.3.4.5班

班级：姓名：分数：

第一部分：单选题

1.The main generators are connected to_____.

A. distribution boards

B. section boards

C. emergency switch boards

D. main switch boards

2. _____ control system is one in which the control action is independent of the output.

A. Feed back

B. Negative feed back

C. Close loop

D. Open loop

3.The coil of wire rotating in the magnetic field produces the_____.

A. voltage

B. current

C. power

D. frequency

4. _____ shall be continuously powered and shall have an automatic changeover to a stand by power supply in case of loss of normal power supply.

A. Cooling system

B. Alarm system

C. The air conditioning installation

D. The mooring equipment

5. The operation of paralleling two alternators requires the voltages to be_____ and also in phase.

A. zero

B. eliminated

C. different

D. equal

6. _____ is the actual value of the controlled condition.

A. Desired value

B. Set value

C. Measured value

D. Deviation

7. With UMS, when the engine room is unwatched_____ will control the main engine.

A. the bridge officer on watch

B. the chief engineer

C. the duty engineer.

D. the duty motorman

8. The staring current of a motor is_____ the rated current.

A. the same as

B. much larger than

C. less than

D. none of the above

9. The alternating current generator supplying a load has a voltage drop resulted from the load. When the load has a lagging power factor this voltage drop_____.

A. is small

B. may be neglected

C. is useful

D. is considerable

10. The magnetic field is provided by electromagnets so arranged that adjacent poles have _____.

A. opposite polarity

B. the same polarity

C. negative polarity

D. positive polarity

11. This arrangement is_____ if the elements are directly connected to one another and the control action takes place without human involvement.

A. a manual closed loop

B. a manual opened loop

C. an automatic closed loop

D. an automatic opened loop

12. _____ is used to produce electric power.

A. An alternator

B. A fresh water generator

C. A compressor

D. A clarifier

13. 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

14. The output voltage of a 440 volt, 60 hertz, AC generator is controlled by the ______.

A. prime mover speed

B. exciter output voltage

C. load on the alternator

D. number of poles

15. A direct current passing through a wire coiled around a soft iron core is the description of a

simple_____.

A. magnetic shield

B. electromagnet

C. piezoelectric device

D. electromagnetic domain

16. As a general rule, the first troubleshooting action to be taken in checking faulty electric control devices is to_____.

A. draw a one line diagram of the circuitry

B. test all fuses and measure the line voltage

C. take megger readings

D. insulate the apparatus from ground

17. Which of the following devices are protected from being motorized by a reverse-power relay?

A. Alternators

B. Wave guides

C. Exciters

D. Amplidynes（电机放大机）

18. The primary function of an electric motor is to_____.

A. develop torque

B. generate high voltages

C. produce a magnetic field

D. generate high electrical resistance

19.The total power consumed in a parallel circuit is_____.

A. the sum of the powers used in each load (resistor)

B. divided by the number of loads

C. always less than the power used in the smallest load

D. the sum of the powers used in each individual load never more than the power used in the largest load

20. 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

21. During an engine room watch if immediate action is necessary to ensure safety of the ship its machinery and crew_____.

A. the chief engineer must be informed at first

B. the captain must be informed at first

C. it must be taken by the duty engineer

D. the generator engine must be stopped

22. Ship fire-fighting organization includes_____.

A. general alarm and fire control plans

B. muster stations and duties of individuals

C. patrol system

D. All of the above

23. The lowest temperature at which the vapor formed from a liquid ignites and continues to burn steadily in the presence of an ignition source is called the_____.

A. flash point

B. fire point

C. upper explosive limit

D. lower explosive limit

24. A fire is considered "under control" when_____.

A. all hands are at their fire stations

B. all fire-fighting equipment is at the scene

C. the fixed systems are activated

D. the fire is contained and no longer spreading

25. A(n)_____ is a mechanical attack on the metal surface which may be due to a disturbance in the flow

of the water over the blade of the propeller.

A. erosion

B. corrosion

C. pitting

D. dezincification

26. When a vessel is in dry-dock, the vessel's engineers should_____.

A. examine the condition of the propeller

B. chip and paint all hull protection zincs

C. install new docking plugs in all cofferdams

D. inspect the hull for hogging or sagging

27. The order "Bow thrust stop " means “_____”.

A. Bow thrust full to pert

B. Bow thrust full to starboard

C. No bow thrust revolutions

D. No stern thrust revolutions

28. _____,it is usually to give the main diesel engine a brief trial on power ahead and astern .

A. Before finished with the engine

B. After finished with the engine

C. Before “stand-by” is given to the bridge

D. After “stand-by” is given to the bridge

29. Which of the circumstances listed is an exception to the garbage discharge requirements in Annex V

to MARPOL 73/78?

A. The garbage to be discharged will sink.

B. Garbage accumulation onboard has exceeded storage space.

C. A person falls overboard, and a plastic ice chest is thrown for flotation.

D. The destination port or terminal cannot receive garbage.

30. A person on a fixed or floating platform engaged in oil exploration, located 10 nautical miles from

nearest land MAY discharge_____.

A. food waste

B. food, ground to less than 1"

C. paper, ground to less than 1"

D. None of the above

31. Annex IV of MARPOL 73/78 contains regulations for the prevention of_____.

A. pollution by oil

B. pollution by noxious liquid substances carried in bulk

C. pollution by sewage from ships

D. pollution by garbage from ships

32. According to Annex I of MARPOL 73/78, oily waste from cargo tanks of oil tankers can be

discharged when the ship is more than _________away from the nearest land.

A. 50 nautical miles

B. 30 nautical miles

C.15 nautical miles

D. 12 nautical miles

33. _____ should not undertake any task which will interfere with the supervision duties relating to the main machinery and associated equipment.

A. The watch keeping personnel

B. The chief engineer

C. The person on a bunker barge

D. Any of the above

34. The operating diesel generators will have their exhaust temperatures, cooling water and lubricating oil temperatures and pressures_____ in much the same way as for the main engine.

A. to be kept

B. logged

C. changed

D. has remained

35. When under maneouvring conditions with the machinery being manually operated the control unit or console should be_____.

A. automatically controlled

B. continuously manned

C. off power

D. none of the above is true

36. The officer in charge of the engineering watch shall ensure that all machinery involved with the maneuvering of the ship can immediately be placed in the_____ of operation when notified that the ship is in congested waters.

A. manual mode

B. automatic mode

C. remote mode

D. follow-up mode

37. With UMS, when the engine room is unwatched,_____ will control the main engine.

A. the bridge officer on watch

B. the chief engineer

C. the duty engineer

D. the duty motorman

38. STCW shall apply to seafarers_____ on board seagoing ships entitled to fly the flag of a Party.

A. served

B. serving

C. surveyed

D. surveying

39. If the PSCO from general impressions or observations on board has_____ for believing that the ship, its equipment or its crew do not substantially meet the requirements, the PSCO should proceed to a more detailed inspection.

A. clean report

B. serious deficiencies

C. clear grounds

D. detention report

40. 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

41. The Port Authorities, in accordance with the IMO resolutions have been carrying out_____ to enhance safety of ships.

A. CPP

B. FPP

C. PSC

D. FSC

42. For a general cargo ship, _____is not the necessary certificate/document that the PSCO will examine.

A. survey report file

B. Minimum safe manning document

C. certificates of competency

D. international oil pollution prevention

43. The main purpose of port state control is not to ______

A. prevent an unsafe ship proceeding to sea

B. prevent a ship threatening the marine environment

C. fine the ships

D. confirm a safe sailing

44. In deciding to detain a ship or not, the PSCO would better not_______.

A. make his decision independently

B. request the owner’s representatives to provide proposals

C. cooperate with the flag State Administration’s representatives

D. consult the organization responsible for issuing the relevant certificates

45. When a vessel is in dry-dock, the vessel's engineers should_____.

A. examine the condition of the propeller

B. chip and paint all hull protection zincs

C. install new docking plugs in all cofferdams

D. inspect the hull for hogging or sagging

46. Which one of the following repair will cost the least cost? ______

A. routing docking repair

B. voyage repair

C. damage repair

D. convention

47. "Before disconnecting the oil pipe, would you flush the oil retained in the pipe?" asked the oil barge owner.

A. by using of fresh water

B. with compressed air

C. by using of sea water

D. with chemical compound

48. _____ shows 1.2 meter and the specific gravity of the oil is 0.96. According to the measuring scale, that makes 150 tons.

A. The piston rod

B. The push rod

C. The sounding rod

D. The connecting rod

49. 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

50. The distance between the bottom of the hull and the waterline is called_____.

A. tonnage

B. reserve buoyancy

C. draft

D. freeboard

51. What will be the phase angle relationship of a six-pole, three-phase, rotating field generator _____.

A. 60

B. 120

C. 180

D. 360

52. 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

53. If you detect oil in the water around your vessel while discharging fuel, the FIRST thing to do is_____.

A. try to find out where the oil is coming from

B. call the Master

C. have the pump man check the discharge piping

D. shutdown operations

54. As its temperature rises, the volume of fuel oil in the tanks will_____.

A. remain the same

B. increase

C. decrease

D. none of the above

55. During fueling operations, which of the listed precautions should be taken when topping off fuel

tanks?

A. Reduce the pumping rate by closing the deck filling valve.

B. Close all overflow valves.

C. Place 5 gallon containers under all flange connections in the fuel line.

D. Reduce the pumping rate and sound tanks frequently as the level rises.

56. 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

57. Which of the following gases represents the greatest threat to personnel safety in an engine room where the exhaust is leaking from a diesel engine?

A. Carbon dioxide

B. Carbon monoxide

C. Carbon trioxide

D. Hydrogen sulfide

58. Where should muster lists be posted?

A. In crew's accommodation spaces

B. On the navigating bridge

C. In the engine room

D. All of the above.

59. An oxygen indicator will detect_____.

A. the amount of oxygen in a space

B. the presence of harmful amounts of carbon monoxide

C. concentrations of explosive gas

D. All of the above

60. Which of the petroleum products listed has the lowest flash point?

A. Hydraulic oil

B. Lubricating oil

C. Diesel oil

D. Refrigeration oil

61. Upon the completion of required tests, a_____ should be placed on each extinguisher, showing the date and the person who completed the tests.

A. cap

B. disc

C. tag

D. cover

62. The main causes of fire on board ships are_____.

A. oil leakage in engine-room

B. hot work (welding, cutting, etc.)

C. static electricity

D. All of the above

63. The fire-fighting practical training should take place in spaces which provide truly realistic training conditions, and whenever possible and practical should be carried out in_____.

A. darkness

B. daylight

C. simulated engine-room

D. all of the above

64. To prevent the spread of fire by conduction, you should_____.

A. cool the bulkheads around the fire

B. remove combustibles from direct exposure

C. close all openings to the area

D. shut off all electric power

65. Burning diesel oil should be treated as which class of fire?

A. Class "A"

B. Class "B"

C. Class "C"

D. Class "D"

66. Convection spreads a fire as a result of_____.

A. transmitting the heat of a fire through the ship's metal

B. burning liquids flowing into another space

C. heated gases flowing through ventilation systems

D. the transfer of heat across an unobstructed space

67. Fire detecting systems on merchant vessels may be arranged to sense_____.

A. smoke

B. rate of temperature rise

C. ionized particles

D. all of the above

68. A burning AC motor would be considered what class of fire?

A. Class "A"

B. Class "B"

C. Class "C"

D. Class "D"

69. Which of the following statements is least likely to cause the ignition of fuel vapors?

A. Static electricity

B. An open running electric motor

C. Loose wiring

D. Explosion proof lights

70. A fire may be spread by which of the following means?

A. Conduction of heat to adjacent surfaces

B. Direct radiation

C. Convection

D. All of the above

71. A fire and boat drill on a tank vessel shall, by regulation, include_____.

A. starting the fire pumps

B. checking fireman's outfits and other personnel rescue equipment

C. checking relevant communications equipment

D. All of the above.

72. Besides heat, fuel, and oxygen, which of the following is necessary for a fire to exist?

A. Chain reaction

B. Thermal action

C. Chemical occlusion

D. Pyrotechnical reaction

73. Which of the listed classes of fire is considered as one involving electrical equipment?

A. Class "A''

B. Class "B"

C. Class "C"

D. Class "D"

74. A fire involving aluminum powder would be a class_____.

A. "A" fire

B. "B" fire

C. "C" fire

D. "D" fire

75. One of the disadvantages of using carbon dioxide to extinguish a fire in an enclosed space is_____.

A. the "snow" which is sometimes discharged along with the gas is toxic

B. prolonged exposure to high concentrations of C02 gas causes suffocation

C. rapid dissipation of the CO2 vapor

D. the CO2 gas is lighter than air and a large amount is required to extinguish a fire near the deck

76. A fire in a pile of canvas would be classified as a_____.

A. class A

B. class B

C. class C

D. class D

77. For which of the listed classes of fire combinations would carbon dioxide be most suitable as the extinguishing agent_____.

A. Class "A" and class "B"

B. Class "B" and class "C"

C. Class "A" and class " C"

D. Class "C", class "D", and class "E"

78. CO2 extinguishes a fire by_____.

A. a blanket of bubbles formed on the surface of the fire

B. smothering

C. cooling

D. isolating the heat from the fuel

79. The longer an oil fire is permitted to burn, the_____.

A. harder it is to extinguish

B. easier it is to extinguish

C. less chance there is of re-ignition

D. easier it is to control

80. When welding or burning aboard a vessel, you must be certain that the space _____.

A. is properly vented

B. contains no explosive fumes

C. has no oil in the bilges

D. All of the above 81, "Movement of engine no longer required." means “_____”.

A. Stop Engine

B. No Engine Revolutions

C. Stand-by Engine

D. Finished With Engine

82. When preparing an engine for running, the cooling water temperature ________

A. should be kept at a proper level by a coole r

B. should be raised to about 800C

C. should be raised gradually

D. should be lowered to about 600C

83. UMS stands for ______

A. ultra much space

B. universal medium system

C. unit mac, ned space

D. unattended machinery space

84. The operation of paralleling two alternators requires the voltages to be_____ and also in phase.

A. zero

B. eliminated

C. different

D. equal

85. The emergency generator or emergency battery is connected to_____ on most large ships.

A. distribution boards

B. section boards

C. emergency switch boards

D. main switch boards

86. Moisture in a D.C. motor would cause_____.

A. short circuit

B. speed up

C. slow down

D. hunting

87. The current flowing first in one direction and then in another is called_____ current.

A. an alternating

B. a rush

C. a direct

D. an exciting

88. _____ is a precaution which contributes to avoiding trouble under normal operating conditions.

A. Constant inspection

B. Keeping constant load

C. Remaining constant temperature

D. varying speed

第二部分:关联题

1.

At every dry-docking, propellers should be carefully examined and the slightest defect at once rectified. Similarly, any unusual vibration or noise whilst at sea should be investigated immediately and, if the cause cannot be found inlxmrd, then the first opportunity must be taken of an under-water inspection. The expert examination and repair of propellers is a service provided by the leading manufacturers. Whenever possible, use should be made of this service because, first, it is not always easy to detect slight damage and, secondly, inexpert work can quite easily cause irreparable harm.

Cracks formed at or near blade edges, no matter how small, are potentially dangerous, ff a crack should be found close to the boss (within 0.45 of the propeller radius) the makers should be consulted as any repair in this region involving heating can leave very high residual stresses which can only be removed by annealing the complete propeller. Small cracks can be temporarily stopped from spreading by drilling a hole of at least 1 mm in diameter at the extremity of the crack. The hole should be plugged to avoid any risk of cavitation.

89. An under-water inspection should be taken_____.

A. whenever any unusual vibration occurs

B. whenever any abnormal noise occurs

C. whenever the cause for any unusual vibration or noise while at sea cannot be found inboard

D. whenever every dry docking is carded out

90. Why should the service provided by the leading manufacturers be used wherever possible?

A. Only because the service is free of charge.

B. Only because it is not easy to detect slight damage.

C. Only because inexpert work can quite easily cause irreparable harm.

D. Because it is difficult to find slight dmnage and inexpert work can result in irreparable harm.

91. If a crack should be found near the boss (within O. 45 of the propeller radius), which action should be taken first?

A. Repairing this region

B. Annealing the complete propeller

C. Consulting the makers

D. Drilling a hole with diameter less than 1 mm

92. Which of the following statements is tine?

A. If cracks formed near blade edges are very small, no care should be taken.

B. Only by annealing the complete propeller can the high residual stresses be removed.

C. Small cracks can be permanently stopped from spreading by drilling a hole.

D. The hole should be drilled at the middle of the crack.

2.

The CO2 fire extinguishing installation may incorporate a smoke sampling system so that fire can be detected in the early stage at the smoke detecting cabinet, which is situated in the wheelhouse. Each cargo compartment is individually connected to the smoke detecting cabinet with small bore piping and, by a suction fan mounted on the wheelhouse roof, samples of the air in each cargo space are continually drawn up to the smoke detecting cabinet and discharged into the wheelhouse or the atmosphere through a diverting valve. Thus smoke from a fire in any cargo space can be immediately detected.

93. The CO2 fire extinguishing system may combine with_____ to detect fire in the early

stage of fire development.

A. a smoke detecting system

B. a wheelhouse

C. a cargo compartment

D. a crew's cabin

94. The function of the smoke sampling system is_____.

A. to analyze smoke components

B. to detect fire in the early stage

C. to prevent the wheelhouse from catching a fire

D. to ventilate each cargo compartment

95. According to this paragraph, which of the following statements is true?

A. The smoke sampling system consists of the CO2 fire extinguishing installation and smoke detecting cabinet.

B. The smoke detecting cabinet is located on the wheelhouse roof.

C. The suction fan draws samples of the air from cargo spaces.

D. Samples of the air flow into the detecting cabinet at regular intervals.

96. Which of the following devices does the smoke sampling system consist of?

(1) fire extinguishing installation; (2) smoke detecting chamber; (3) wheelhouse; (4) cargo compartment; (5) suction fan; (6) diverting valve

A. (1), (2), (5)

B. (2), (4), (5)

C. (3), (4), (6)

D. (2),(5), (6)

1002级轮机英语期末考试（B）考试班级：1002轮机2.3.4.5班

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

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