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：802
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：802
适用对象：近洋航区750-3000KW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. power is the power developed within the cylinder and can be measured by an engine indicator.
A. The shaft
B. The mechanical
C. The electric
D. The indicated
2. If your vessel burns 8 tons of fuel per hour at 15 knots, how many tons per hour will it burn at 18
knots?
A. 13.82 tons
B. 15.61 tons
C. 16.00 tons
D. 16.37 tons
3. Care and cleanliness are required when installing diesel fuel filters.
A. to prevent the fuel system from becoming air-bound
B. to prevent the fuel system becoming clogged with dirty particles
C. Both of the above .
D. to prevent the lubricating oil from leaking out of the filter element
4. About half an hour before the engine is required, cooling water at must be circulated in
principle.
A. more than the working temperature
B. less than the working temperature
C. the working temperature
D. the same as the surrounding temperature
5. The function of a lubricating oil is to lubricate the running surface to carry away a
great deal of heat.
A. not/but
B. neither/nor
C. either/or
D. not only/but also
6. Which of the following statements describes the relationship between viscosity and specific gravity?
A. Liquids with different viscosities will always have the same specific gravity.
B. Liquids with different viscosities will never have the same specific gravity.
C. Viscosity and specific gravity are directly proportional.
D. Viscosity and specific gravity are not related in that one does not define or limit the other.
7. Cooling makes the engine metals their mechanical properties.
A. remain
B. to remain
C. retain
D. to retain
8. On opposite ends of a single shaft of a turboblower are a gas driven and a air compressor,
which are sealed each other.
A. charge air receiver
B. scavenging air belt
C. turbine
D. air cooler
9. Uniflow is the most efficient scavenging system but requires an opposed piston
arrangement an exhaust valve in the cylinder head.
A. neither, nor
B. both, and
C. either, or
D. not only ,but also
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. Wake varies considerably with the form of the vessel, but , generally speaking, the bluffer the
ship the wake value.
A. the higher
B. the lower
C. the faster
D. the slower
12. In a diesel engine, the main bearings are used between the.
A. connecting rod and the crankshaft
B. wrist pin and the connecting rod
C. camshaft and the engine block
D. crankshaft and the engine block
13. are commonly used in mechanical-hydraulic governor to sense engine speeds.
A. Bulbs
B. Bulks
C. Flyweights
D. Flywheels
14. When is compressed, its temperature rises so that it ignites the fine spray of fuel injected
into the cylinder.
A. the oil
B. the air
C. the fresh water
D. the steam
15. 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
16. The indicated power of an engine can be obtained by taking the.
A. precautions
B. rpm
C. indicator cards
D. B and C
17., 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
18. A large low speed main propulsion diesel engine may become overloaded by. I. a heavily fouled
hull II. strong head winds and heavy seas
A. I only
B. II only
C. both I and II
D. neither I nor II
19. A gear pump belongs to according to its working principle.
A. reciprocating pumps
B. positive displacement pumps
C. centrifugal pumps
D. centripetal pumps
20. A feed pump for an auxiliary boiler might lose suction if the.
A. boiler water level is low
B. feedwater is too hot
C. boiler steam demand is low
D. feedwater is too cold
21. A check valve is another name for.
A. a test valve
B. an inspection valve
C. a stop valve
D. a non-return valve
22. provides the head of pressure to supply the domestic water where required.
A. The compressed air
B. The compressing air
C. The transfer pump
D. The head tank
23. 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
24. When an auxiliary boiler is panting and emitting black smoke, you should.
A. increase the fuel oil temperature
B. decrease the fuel oil temperature
C. decrease the fuel oil supply pressure
D. increase the air supply
25. For a purifier, changing to a gravity disc with larger hole diameter will move the interface towards the.
A. bowl periphery
B. bowl center
C. upper surface
D. lower surface
26. A class ' C' fire is burning.
A. diesel oil
B. magnesium
C. dunnage
D. electrical insulation
27. For many years marine centrifuges were designed for operation, that is the machines were
run for a period during which solids accumulated in the bowl.The machine was stopped when the accumulated solids began to impair its performance.
A. purifying
B. batch
C. long period
D. temporary
28. In a complete oil/water separator, more oil will separate out onto the underside of these plates and
travel outwards until it is free to rise into the oil c ollecting space. What ' s the meaning of the
sentence above?
A. a separator
B. oil
C. water
D. an oil collecting space
29. The device used for low-pressure control and high-pressure cutout on a compressor is called a
.
A. cutout
B. controller switch
C. pressure controller
D. cutout switch
30. are used to handle anchors and chains.
A. Cargo winches
B. Mooring winches
C. Windlasses
D. Cargo hatches
31. Topping wires fix the height of the derricks and to the deck may be used to prevent fore
and aft movement.
A. stays
B. winches
C. barrels
D. brakes
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 rudder, the shock is transmitted through the tiller to.
A. the tiller arms
B. the swivel blocks
C. hunting gears
D. the rams
34. With reference to rules governing steering gear, which one of the following rules is incorrect ?
A. It is required that all ships are provided with two independent steering gear systems that is one
main and one auxiliary.
B. The auxiliary gear could be power operated in passenger ships.
C. The auxiliary gear must be of adequate strength and sufficient to steer a ship at navigable speed.
D. All moving parts of the steering gear must be guarded against any possible damage.
35. Compressed air is supplied by air compressors to.
A. the air receivers
B. the starting valves
C. the cylinder covers
D. the distributors
36. Which of the following statements is true concerning any evaporator?
A. High conductivity of the distillate indicates distillate salinity is excessive.
B. Increasing the absolute pressure of the shell will increase the distiller's capacity.
C. Mesh separators are used in evaporators to filter the distillate.
D. Reducing the brine density will reduce the heat lost overboard.
37. It is important that the two condensate drain cocks, fitted to the underside of the scavenging box,
until the engine is placed on full load.
A. remain open
B. remain close
C. retain open
D. retain close
38. The effect of high vapor superheat in a refrigeration system, is a/an.
A. increased capacity of the compressor
B. more efficient operation of the thermal expansion valve
C. decreased capacity of the compressor
D. loss of receiver capacity
39. The cooler as the liquid becomes,.
A. the faster it will evaporate
B. the slower it will condense
C. the slower it will evaporate
D. the faster it will flow
40. Most air conditioning units have for adjusting the ratio of recirculated fresh air. Care must
be taken not to reduce the fresh air so that stuffiness or smells arise.
"it A. catch plates B. dampers C. regulating valves D. fans
41. 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.
42. An increasing head pressure in a refrigeration system, without any corresponding change in the
cooling water inlet temperature, would probably be caused by.
A. restriction in refrigerant piping
B. air and non-condensable gases in the condenser
C. water in the refrigerant
D. flooding back of liquid refrigerant from the evaporator
43. Current changing in direction and rising and falling in value is.
A. A.C
B. D.
C. C. generator
D. fresh water generator
44. The staring current of an a.c. motor is the rated current.
A. the same as
B. much larger than
C. less than
45. Any electric motor can be constructed to be.
A. short proof
B. ground proof
C. explosion proof
46. Moisture in a D.C. motor would cause.
A. short circuit
B. speed up
C. slow down
D. hunting
47. 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
48. The is a crystal which, under pressure, produces an electric current which varies with the
pressure.
A. alternator
B. glass thermometer
C. burdon tube
D. piezoelectric pressure transducer
49. A main propulsion diesel engine is normally shut down by.
A. shutting off the air supply
B. over-speeding the engine
C. securing the fuel supply
D. securing the ignition system
50. Engine protection by means of an alarm or shutdown control can be obtained with devices that are
sensitive to.
A. temperature
B. pressure
C. engine speed
D. All of the above.
51. Which of the following statements represents the main difference between a relay and a contactor?
A. Contactors control current and relays control voltage.
D. equals
D. overload proof
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.
52. The greatest detrimental effect on idle electrical equipment, such as cargo pump motors, is the
A. loss of residual magnetism
B. absorption of moisture in the insulation
C. insulation varnish flaking
D. dirt collecting on the windings
53. The crank-room cover should not be opened until at least minutes after the engine stops.
A. 10
B. 15
C. 20
D. 30
54. When deciding the composition of the engineering watch, which may include appropriately,
many factors shall be taken into account.
A. satisfied engineers
B. qualified ratings
C. satisfied chief engineer
D. qualified chief engineer
55. Administrations should bear in mind the significance of in maintaining safety of life and
property at sea and in preventing marine pollution.
A. advanced nautical equipment
B. advanced performance main engines
C. emergency equipment
D. communication and language skills
56. 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
57. The Port State Control officer may witness a fire drill carried out by the crew assigned to these
duties on the.
A. Navigation Log Book
B. Engine Room Log Book
C. Oil Record Book
D. Muster List
58. 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
59. A fire in a pile of dunnage would be classified as a.
A. class A
B. class B
C. class C
D. class D
60. The fire drill must, as far as practicable, be conducted as if.
A. there is a minor emergency
B. there is an actual emergency
C. there were a minor emergency
D. there were an actual emergency
61. Duty officer informs us that the vessel is out of harbor and in " Full AheaWe a re 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
62. Auxiliary machinery covers everything onboard except.
A. main engines
B. main boilers
C. pipes and fittings
D. A and B
63. In cleaning up an oil spill, the use of chemical agents would.
A. absorb the oil for easy removal
B. remove the oil from the water
C. disperse or dissolve the oil in the water
D. not affect the oil
64. The three basic elements necessary for any fire are.
A. heat, gas, and flames
B. fuel, heat, and oxygen
C. heat, nitrogen, and fuel
D. fuel oil, nitrogen, and oxygen
65. 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
66. The direct cause of a crankcase explosion can be attributed to.
A. extremely hot scavenge air
B. excessive cooling water temperature
C. an overheated bearing
D. excessive lube oil in the crankcase
67. 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
68. The minimum number and capacity of bilge pumps and fire pumps and their dispersement 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.
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：
The CO 2 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.
69. The CO 2 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
70. 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
71. According to this paragraph, which of the following statements is true?
A. The smoke sampling system consists of the CO 2 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.
72. 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)
第二组：
Governing prime movers, particularly diesel engines, require careful consideration. The cyclic variations of a diesel cycle can be passed into the governo r drive if it is too ' stiff ' . That is, the cyclic
vibrations will be imposed on the internal gearing etc. inside the governor housing. To prevent this, some form of damper should be used on the drive into the governor. The mounting point for the governor should be rigid; a vibration mounting would soon downgrade even the best of governors. Chain or belt drives should be avoided as far as possible, as slapping of the belt or chain produces speed variations causing malfunction of the governor. Similarly the drive from the end of the camshaft is subject to torsional vibrations, and governors should not be located at that point. They should be located as close as practicable to the fuel pumps, thereby limiting the mass/inertia of operating linkage. In all cases, the governor should be matched to the engine requirements in terms of droop, load limiting, response time etc. On large engines there is an inertial resistance to acceleration within the masses of reciprocating and rotating elements of the engine, so that during acceleration fuel could be released to the cylinders at a faster rate than efficient combustion can burn it. In an attempt to compensate for this, and to maintain acceptable combustion during acceleration, a tapping from the scavenge space may be taken and the pressure used to regulate the rate of fuel released to the engine. This process is incorporated into the governor operating system so that the governor releases a quantity of fuel commensurate with the increase in air pressure in the scavenge space.(during deceleration the problem is not so great, as excess air can be tolerated far more easily than can the incomplete combustion associated with insufficient air.) 73. This passage is mainly about __.
A. mounting the governors C. A and B 74. The drive to the governor
A. should be rigid
C. should use chains or belts
75. The governor should be
mounted close to the fuel pumps
A. for limiting the inertia effect
B. for limiting the load
C. to ensure speed droop D . to cut down the cost 76. It can be inferred that with scavenge pressure limit
A. the engine can be accelerated rapidly C. the
governor will supply fuel oil efficiently 三、中译英（共2题，请将答案写在答题纸上）
77. PSC 官员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. 主机二号、四号主轴承应用桥规测量，打开并转出检查，如果有必要再浇白合金，间隙用
压铅法测量，并按要求调整到 0.29~0.34毫米。测量一式三份交轮机长。
B. the scavenge pressure limit to the governor D. how the governor regulates the fuel index B. should use damper D. should be from the end of the cam shaft . B. the engine can be decelerated rapidly
D. the combustion will be more complete
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