轮机英语历年真题48期
中华人民共和国海事局
2009年第5期海船船员适任统考试题（总第48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88题，每题1分，第89题至96题，每题1.5分。
一、单项选择题
1. Diesel engines classified as reciprocating internal combustion engines because they____
A. use energy from fuel burned outside their cylinders
B. burn fuel in a combustion chamber that moves back and forth
C. burn fuel in a chamber where its energy moves a piston up and down
D. a continuous combustion process to impart rotary motion to the pistons
2. The abbreviation “MIP” stands for _____
A. middle indication pressure
B. mean indicated pressure
C. mean indicated pitch
D. middle indicated power
3. The term used to express the ignition quality of a particular fuel is _____
A. cetane number
B. octane number
C. ignition index number
D. volatility point
4. The period when both inlet valves and exhaust valves are open is referred to as____
A. valve loop
B. valve uniflow
C. valve overlap
D. valve grinding
5. Which of the following statements represents the function of the compression rings installed at the top of a diesel engine piston?
A. Control the amount of lube oil burned in the combustion chamber
B. Transmit heat from the piston to the cylinder liner
C. Prevent damage to ring groove inserts by action as a heat dam.
D. Dissipate combustion chamber gas pressure by channeling it through the ring gap.
6. The gas loads on the engine structure are constrained by means of hydraulically
preloaded_____
Which connect the bed plate, frame sections and cylinder jackets into a single unit.
A. connecting rods
B. mean bearing
C. column
D. the rods
7. ______of different thickness are inserted between the shells to enable adjustment of the bearing clearness.
A. Screws
B. Films
C. Dises
D. Shims
8. Compared to four-stroke/cycle engines, two-stroke/cycle diesel engines have the disadvantages of ____
A. less even torque
B. higher cylinder head temperatures
C. fewer power stroke per revolution
D. greater weight/size requirements
9. During the fuel imection 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 valve is flushed clean during each injection
C. prevent combustion gas blowback into the open needle valve
D. prevent reflected pressure waves when the needle valve closes
10. The upper piston rings in large, slow-speed, two-stroke cycle diesel engines are most effectively lubricated by oil ____
A. fed from mechanical lubricators
B. thrown off from the main bearings
C. supplied form wick fed drip lubricators
D. flow from a centrifugal banjo oiler
11. In a diesel engine closed freshwater cooling system, the amount of coolant flowing through the heat exchange is controlled by the _____
A. section pressure regulator
B. thermostatic bypass valve
C. sea water temperature
D. water level in the expansion tank
12. The purpose of an after-cooler is to ______
A. reduce the turbocharger operation temperature
B. increase the pressure of the inlet air
C. increase the density of the inlet air
D. reduce the blower operation temperature
13. Compressed air is supplied by air compressors to _____
A. the air receivers
B. the starting valves
C. the cylinder covers
D. the distributors
14. _____supplies pilot air to control the cylinder air start valves.
A. An air receivers
B. An indicator cock
C. An air distributor
D. A safety valve
15. Thermocouple pyrometers are used on large, main propulsion diesel engines to indicate the temperature of the ______
A. cooling water leaving each cylinder
B. fuel oil entering the injector
C. exhaust gases at various locations
D. lube oil at the bearing suppliers
16. After starting a diesel engine, which of the listed operating conditions should be checked first?
A. Air box pressure
B. Lube oil pressure
C. Exhaust temperatures
D. Raw water pressure
17. 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
18. Air cocks, usually positioned at the ______in a circulating systems, is used to get rid of the air in the system.
A. bending joint
B. expansion tank
C. weld
D. the highest point
19. Some medium and high-speed diesel engines require reduction gear units to provide a useful propeller speed. In most reduction gears, the bull gear____
A. must churn the oil in the sump
B. is connected to the propeller shaft
C. is driven at the highest RPM
D. compensates for alignment variations between the engine and pinion gear
20. Which of the following statements concerning fire-tube boilers is correct?
A. combustion gases flow through the tubes
B. flames impinge on the tubes
C. combustion occurs in the tubes
D. water flows through the tubes
21. A bypass line provided around a waste heat auxiliary boiler in a diesel engine exhaust system, may be used to avoid boiler______
A. corrosion at low engine loads
B. erosion at high engine loads
C. overload at high engine loads
D. scaling at all exhaust temperature
22. The amount of chlonde content in the water of an auxiliary boiler can be reduced by _____
A. adding hydrazine
B. blowing down the boiler
C. adding phenolphthalein
D. adding a sulfite chloride scavenger
23. Failure of the burner flame in an automatic auxiliary boiler would probably be a result of
______
A. water in the fuel oil
B. broken high tension leads
C. incorrect electrode setting
D. full fuel pressure at the nozzle
24. Boiler water hardness is increased by _____
A. zero alkalimty to the water
B. scale forming salts in the feedwater
C. dissolved gases in the water
D. improper operation of the DS heater
25. A screw pump belongs to ______according to its working principle
A. recipmcating pumps
B. positive displacement pumps
C. dissolved gases in the water
D. centripetal pumps
26. A centrifugal pump operating against a closed discharge valve has a/an_______
A. capacity of 100%
B. efficiency of 0%
C. internal slippage of 0%
D. shut off horsepower rating of 100%
27. Before disconnecting a joint in a pipeline, you should______
A. determine the size of the gasket
B. hang a bucket under the joint
C. have a first aid kit on hand
D. be sure no pressure exists in the line
28. It is possible to mount a double suction centrifugal pump impeller with the vanes facing in the wrong direction. This would cause the pump ______
A. head capacity to improve
B. discharge to be reversed
C. efficiency to decrease
D. slippage to decrease
29. If a centrifugal pump is driven by a constant speed electric motor and produces a discharge pressure less than designed, the cause is probably_____
A. excessive pump speed
B. excessive suction head
C. worn wearing rings
D. gross pump misalignment
30. Properties of a good refrigeration oil include_______
A. low wax content
B. high pour point
C. high viscosity
D. low wax content, high pour point, high viscosity
31. The _____ only allows for adjustment of temperature in each room by the occupant manually controlling the air volume admitted.
A. central air conditioning system
B. high velocity system
C. low velocity system
D. single duct system
32. The process of adding moisture to air to increase the relative humidity is known as______
A. sublimation B desiccation C. humidification D. miniaturization
33. Sludgy may form in the crankcase of an air conditioning compressor as a result of _____
A. bubbling refrigerant
B. overheating and oxidation
C. lowered operating temperatures
D. reducing the cloud or floc point
34. Which of the equipment listed is most effective in processing bilge slops for overboard discharge
A. a 100 PPM oily water separator
B. assembling the lube oil purifier as a separator and aligning it to the bilge overboard
C. a 15 PPM oily water separator
D. a magnetic duplex strainer
35. When started, a complete oily water separating unit is first filled _____. The oily water mixture is then pumped through the inlet pipe into the coarse separating compartment.
A. with dirty water
B. with clean water
C. by oily water
D. by mixed water
36. Which is the pollution prevention equipment?
A. booster pump
B. evaporator
C. incinerator
D. cooler
37. Concerning the incinerator’s operation, which of the following is not correct?
A. scavenging time should be more than 30 seconds before igniting
B. the oil temperature of waste oil tank is 80-100℃
C. first igniting the incinerator with diesel oil when the temperature of hearth is about 600℃, the waste oil is drawn in.
D. the ash from incinerator can be dumped into sea no distance limitation
38. Bacteria which live ____are said to be aerobic
A. in the presence of oxygen
B. without oxygen
C. in the presence of nutrition
D. without nutrition
39. For a purifier changing to a gravity disc with smaller hole diameter will move the interface
towards the ______
A. bowl periphery
B. bowl center
C. upper surface
D. lower surface
40. To ensure lube oil purifier working in normal condition, the interval between two sludgy discharging should not exceed ____ hours.
A. 2
B. 4
C. 5
D. 6
41. Which of the following problems will occur if a disk-type centrifugal lube oil purifier is not properly primed prior to admitting oil flow to the bowl?
A. Contamination of the lube oil by emulsification will result
B. The lube oil will not be subjected to the proper centrifugal force
C. The lube oil will overheat and flash
D. Oil will discharge from the heavy phase discharge port and be wasted
42. A vacuum is initially created in a flash type distilling plant by _____
A. the flashing of the feed water
B. the condensation of the saltwater feed
C. air ejectors, eductors, of a separate vacuum pump
D. condensation of the distillate
43. On which of the following heated surfaces of a flash type evaporator would you be more likely to find soft scale formation?
A. Feed-water heater internal tube surfaces
B. Internal distillate cooler tubes
C. Flash chamber vertical surfaces
D. pressure control valve
44. What type of valve is used to direct the flow of hydraulic fluid?
A. relief valve
B. direction control valve
C. stop valve
D. pressure control valve
45. Another name for the “swash plate” in the variable delivery pump is _____
A. tiltable disc
B. gravity disc
C. distributing disc
D. catch plate
46. The drive motor will have a brake arranged to fail-safe, i.e. it will ___the load if power fails or machine is stopped.
A. lift
B. put
C. take
D. hold
47. If the pump for a hydraulic anchor windlass is over heating, the cause may be_____
A. increased pump speed
B. excessive pump discharge pressure
C. too low of a tilting box angle
D. low pump speed
48. When the power is shut off, the wire____
A. becomes slack
B. can not be paid out unless the brake is overhauled or recover wire unless manually operated
C. will be let out because the brake is out of work
D. may be pay out due to no power
49. An additive used to improve the ability of a lube oil to reduce friction is known as a/an ____
A. suppressant additive
B. dispersant additive
C. extreme pressure additive
D. viscosity improver additive
50. Strainers are commonly used in hydraulic systems to _____
A. protect the pump from fine soluble contaminants
B. prevent solid particles from entering the pump
C. prevent solid particles from entering the filter
D. protect the directional control valves
51. Current changing in direction and rising and falling in value is ____
A. A.C.
B. D.
C. C. generator
D. fresh water generator
52. The magnetic field is provided by electromagnet, so arranged that adjacent poles have_____
A. opposite polarity
B. the same polarity
C. negative polarity
D. positive polarity
53. Prior to closing the breaker when paralleling two AC. generators, the recommended practice is to have the frequency of the incoming machine_____
A. slightly less than the line frequency
B. the same as the line frequency
C. slightly greater than the line frequency
D. have nothing to do with the lien frequency
54. The power factor at which a paralleled A.C. generator operates is usually adjusted by the ____
A. connected load
B. prime mover speed
C. field excitation
D. generator’s rated voltage
54. When you are making a high potential test on a piece of repaired electrical machinery, a rise in leakage current indicates ________
A. good insulation
B. bad insulation
C. high insulation power factor
D. a high slot discharge factor
56. ______is not a part of the main switchboard on board.
A. Busbar
B. Load panel of main generator
C. Paralleling panel
D. Shore connection box
57. Usually, emergency electricity supplies to _____on board
A. cargo winch
B. windlass
C. steering gear
D. main air compressor
58. The ground terminal of a starter should be connected to _____
A. the common ground point
B. the starter’s frame
C. the communicator
D. the starter’s mounting bolts
59. The separate supplies are connected in either star or delta formation. The star formation is most commonly used and requires ______ slip-rings on the alternator.
A. two
B. three
C. four
D. five
60. 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
61. When measuring AC current flow, you must always connect the meter ______
A. in series with the power source and load
B. in parallel with the power source and load
C. insuring correct polarity
D. using the lowest range possible to prevent instrument damage
62. If a small electric motor is immersed in salt water it should be＿＿＿＿. Ⅰ. washed with free water; Ⅱ.dried in an oven
A. only Ⅰ
B. only Ⅱ
C. both Ⅰand Ⅱ
D. neither Ⅰnor Ⅱ
63. “AMIDSHIPS”refers to ________
A. back of vessel
B. the middle portion of a ship
C. a backward movement of a vessel
D. across the ship, at right angles to the fore-and-aft centerline
64.______is the main cause to the damage of engine parts and excess wearing
A. overload
B. the odds of the load
C. the default of engine parts
D. overload and the odds of the load
65. After “finished with engine”, which of the following cannot be shut off by the duty engineer?
A. fuel oil booster pump
B. the main starting valve
C. the sea chest
D. the main cooling sea water pump
66. Which of the following is NOT a recommended safe practice?
A. Securing equipment against slipping or drifting
B. Operating machinery at its recommended speed
C. Repairing loose handles on tools before using
D. Using tools for purposes for which they are not designed
67. A class “C” fire would occur in _____
A. bedding
B. pipe insulation
C. paint
D. a generator
68. If a fire occurs in the boiler room as a result of a leaking fuel line, you should FIRST______
A. notify the engineer on watch
B. isolate and secure the piping
C. throw sand on the fire
D. extinguish the fire using a combination nozzle with applicator
69. Which of the following statements is true concerning carbon dioxide when used as a fire extinguishing agent?
A. Carbon dioxide is corrosive when exposed to fire
B. Carbon dioxide should be applied slowly to a large engine room fire
C. Its total cooling effect is far greater than water
D. Its smothering effect is excellent for class B fires
70. As a duty engineer, as soon as you hear the fire emergency signal, you should ensure that the _______.
A. ring buoys are thrown overboard
B. engines are stopped
C. fire pumps are started
D. life preserves have been issued to everyone
71. When administering artificial respiration, it is of the utmost importance to ______
A. use the mouth-to-mouth method
B. clear airways
C. use rhythmic pressure method
D. check the injured person’s hearbeat
72. What is the harmful effect of sulfur in a fuel?
A. It causes excessive smoking and soot at low firing rates
B. It doesn’t readily burn when combined with oxygen
C. It clogs fuel oil strainers more often
D. It forms a corrosive acid when mixed water or water vapor
73. _____, where minor repairs are carried out with a ship in service, often during a stay in port. This may be remote from a ship repair site.
A. Voyage repairs
B. Routine docking
C. Damager repairs
D. Conversion
74. When ship in the dock repairing, engine department should emphasize on the inspection of
______.
A. sea valve chest and thruster
B. steering gear and the shaft system
C. sea water system
D. fresh water system
75. The additional mark________ in the Classification Certificate for Machinery represents that personnel are watching at engine assembly control station and monitoring all machinery and electronic devices.
A. BRC
B.MCC
C.AUT-0
D.AUT-1
76. Each completed page of the Oil Record Book must be signed by the _____
A. engineer on watch
B. chief engineer
C. chief mate
D. master
77. The International Oil Pollution Prevention Certificate required by MARPOL is issued to Chinese flag by the ____
A. IMO
https://www.sodocs.net/doc/521534961.html,S
https://www.sodocs.net/doc/521534961.html,CG
D.PICC
78. If________, the PSCO should proceed to a more detailed inspection.
A. the PSCO’s general impression confirm a good standard of maintenance
B. the certificates are valid
C. the PSCO believes the sh ip doesn’t meet the requirements
D. the PSCO can’t find deficiencies at first glance
79. 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
80. STCW78-95 Convention states that officer in charge of the engineering watch is the _______
representative
A. ship-owner’s
B. master’s
C. chief engineer’s
D. manager’s
81. In the event of minor emergencies when the machinery spaces unattended, ___________will be informed of malfunctions in the machinery by his cabin monitor.
A. the chief engineer
B. the engineer on cabin watch
C. the bridge officer on watch
D. the master
82. At an unsheltered anchorage the chief engineer officer shall consult with the master whether or not to ______
A. do engine repair work
B. clean sea water filter
C. maintain an underway watch
D. take bunkering
83. The Pollution Prevention Regulations require that all oil spills in United States waters be reported immediately to the ______
A. local port authority
B. corps of engineers
C. U.S. coast guard
D. state pollution board
84. When the garbage is mixed with some discharges having different disposal or discharge requirements, ________shall apply
A. any requirement appointed by the PSC officer
B. the most suitable requirement
C. the most stringent requirement
D. no requirement
85. According to the SOLAS convention, the engine room emergency bilge water suction should connect with _____
A. the main S.W. pump
B. the ballast pump
C. the air-conditioning water pump
D. the main S.W. pump or ballast pump that have the biggest output
86. The purpose of the ISM Code is to provide ______standard for the safe management and operation of chips and for pollution prevention.
87. ______means the level for which appropriate additional protective security measures shall be maintained for a period of time as a result of heightened risk of a security incident.
A. Security level 1
B. Security level 2
C. Security level 3
D. Security level 4
88. The installation and prevision of fire fighting equipment is mainly subject to ______
A. ISM Code
B. ISPS Code
C. JBC Code
D. FSS Code
二、关联题（关联提题干下有4个小题，每小题4个选项）
第一组：
In a closed fresh water system, the engine jackets, the heat exchanger and the circulating pumps form a continuous circuit which is not open to the atmosphere. The cylinder jacket cooling water after leaving the engine passes to a sea water circulating cooler (heat exchanger) and then into the jacket water circulating pumps. It is then pumped around the cylinder jackets, cylinder heads, exhaust valves and turbo-blowers. However, provision has to be made for the expansion of the water due to the increase in temperature and due to small amounts of air which may enter the system and become entrained and for water make-up due to leakages. These are met by a small head tank which is open to the atmosphere and placed at a higher level than any other point in the system so that the small changes in volume can be accommodated by changing the level of the free surface of the water in the tank. The head tank is generally connected into the system at the pump suction, as this minimizes the chance of air being draw into the system at the pump. The minimum height of the head tank may be based on maintaining pressure of fresh water in the heat exchanger above that of the seawater to ensure that in the event of a small internal lock developing seawater cannot enter the fresh water system. Alternatively, it may be based on the need for a minimum pressure to be maintained within the jackets to avoid cavitations effects. The closed systems usually need vents if steam pockets or air locks are not to cause trouble. Vent pipes of small-bore tube are lead from any local high point in the system to the top of the head tank for the release of air from the cooling water. A heater in the circuit facilitates warming of the engine prior to starting by circulating hot water. The temperature of the water entering the engine jackets is regulated by means of a by-pass across the jacket water cooler. The proportions of water passing through the cooler, or bypassing it are controlled by a three-way valve. The temperature is usually adjusted to maintain a constraint outlet water temperature from the engine regardless of the load or speed or the temperature of the seawater. The piston cooling system may be an open system which employs similar components with the closed system, except that a drain tank is used instead of a head tank and the vent are then led to a hopper or tundish at the high point in the machinery space. The hopper serves as a visual flow indicator. A separate piston cooling system is used to limit any contamination from piston cooling glands to the piston cooling system only.
89. The loop of the jacket cooling water is ______
A. engine----heat exchanger----circulating pumps-----engine
B. heat exchanger-----engine----circulating pumps----heat exchanger
C. circulating pumps----heat exchanger-----engine-----circulating pumps
D. circulating pumps----engine-----heat exchanger----head tank
90. A small head tank is provided in the closed jacket cooling water system for _____
A. water expansion
B. water make-up
C. warming of the engine
D. water expansion and make-up
91. The head tank is connected to the closed circuit at _____
A. engine inlet
B. pumps inlet
C. heat exchange inlet
D. engine outlet
92. The jacket water temperature is regulated to maintain a constraint temperature of ___
A. engine inlet
B. pumps inlet
C. heat exchanger inlet
D. engine outlet
第二组
Following a security incident, in which the response measures outlined in the Ship Security Plan (SSP) have been activated, there will be a thorough review of their effectiveness and details will be made available, on request, to persons duly authorized by the Ship’s Flag State Administration. The Ship Security Plan is not subject to detailed inspection (other than confirming its existence on the ship) by duly authorized officials of a port State unless there are “clear grounds” to believe that the ship as not in compliance with the requirement of SOLAS or the ISPS Code, and the only means to verify or rectify the non-compliance is to review the relevant sections of the Plan. In such cases, access to the Restricted parts of the Plan relating to the non-compliance is exceptionally allowed, but only with the consent of the Flag State, or the master, If the master, in his professional judgment, believes that such “clear grounds” exist, and allowing access to relevant sections of the Restricted part of the Plan might resolve the situation, such access can be exceptionally granted. However, this should be immediately reported by the ship to the Company Security Officer (CSO). If access to the Restricted part of the Plan is denied by the master, this should be immediately reported by the ship to Company Security Officer for guidance and reference to the Flag State.
The Confidential part of a SSP cannot be subject to non-flag State inspection unless otherwise agreed by the contracting governments concerned. Any such request or demand by ort state
officials to view sections of the confidential part of the Plan will be immediately reported by the ship to the Company Security Officer for guidance and reference to the flag State before any details are revealed to non-flag State officials. The Confidential provisions, which from an integral part of this Plan, are held by the Ship Security Officer (SSO)
93. After security incident, the revision of the SSP will made by ______
A. the SCO
B. the SSO
C. persons duly authorized by the Ship’s Flag State Administration
D. information not given
94. Which statement is True?
A. The Port State Control Officer has no right to check a SSP
B. The M aster has the right to refuse the request from a Port State Control Officer to check the confidential part of the SSP on board
C. The Confidential part of a SSP can never been subject to non-flag State
D. Even the flat State has no right to check the SSP thoroughly
95. The Restricted parts of a SSP are kept on board by ______
A. the CSO
B. the SSO
C. the Flag State
D. the master
96. After the SSP being checked by a duly authorized officials of a port State, whom should be reported to by the ship immediately?
A. Port State
B. Flag state
C. The CSO
D. The Administration
01-10CBACB DDBAA
11-20BCACC BBDBA
21-30C(A)BABD(B) DDCCA
31-40DCBCB CDABB(D)
41-50DCABA DBBCB(A)
51-60AACCB DCACB
61-70ACBDC DDBDC
71-80BDAAB DBCDC
81-90BCCCD CBAAD(A)
91 BDCDBC 带括号的答案不确定
第47期轮机英语
47期轮机英语考试题目 一单项选择题 A1.The___ engine is used for alternators and some times for main propulsion provide a propeller of between 90 to 120 rpm. A.four-stroke B.two-stroke. C.slow speed D.reversible B2.The abbreviation”MIP”stands for____, A.middle indicating pressure B.mean indicated pressure C.mean pitch D.middle indicated power D3.The cetane number of a diesel fuel oil indicates its____. A.viscosity B.acid content C.heating value D.ignition quality C4.In a two-stroke engine the camshaft rotates at___the enging rotational speed. A.half B.twice C.the same speed as D.four times D5.A diesel enging is similar to a gasoline engine except that the former has no ____. A.cross-head B.cylinder C.connecting rod D.spark plug C6.It is easier to replace a dry cylinder liner than a wet one because____. A.of the thin wall thickedss B.honing makes it easier to maintain the desired oil film C.water seals are not required D.it fits more loosely due to a decrease in heat transfer through the composite wall D7.A main bearing consists of two shells which are secured by means of studs and____. A.tie rods B.though bolts C.lead wires D.bearing caps C8.However fast or slow the combustion rate,it is still a____between carbon,hydrogen,sulph and oxygen that releases heat. A.physical deformation B.state exchange C.chemical reaction D.coalescence A9.During the fuel injection period,fuel pressure must exceed cylinder gas pressure to____. A.ensure penetration and distribution of the fuel in the combustion chamber B.ensure the needle valves is flushed clean duringeach injection C.prevent combustion gas blowback into the open needle valve Dprevent reflected pressure waves when the neddle valve close. B10.In a diesel engine lube oil system ,which of the following parts should be lubricated first? A.Camshaft bearings B.Main bearings C.Piston crowns D.Cylinder walls B11.In a diesel engine closed freshwater cooling system,the amount of coolant flowing through the heat exchanger is controlled by the _____, A.suction pressure regulator B.thermostatic bypass valve C.sea water temperature D.water level in the expansion tank
轮机大管轮英语真题48期
中华人民共和国海事局 2009年第5期海船船员适任证书全国统考试题(总第48期) 科目：轮机英语试卷代号：803 适用对象：无限、近洋航区3000KW及以上船舶大管轮 （本试卷卷面总分100分，及格分为70分，考试时间为100分钟） 答题说明：请选择一个最合适的答案，并将该答案按答题卡要求，在其相应位置上用2B铅笔涂黑。第1题至82题，每题1分，第83题至94题，每题1.5分。 一、单项选择题： 1. The reason why more and more of the large merchant vessels are being powered by medium-speed diesel engines is . A. they operate between 150 and 450 rpm B. they are connected to the propeller by gearing C. their smaller size and weight D. they can be connected directly to the propeller without gearing 2. The closing of the exhaust valves used on a modern, large, low-speed, main propulsion diesel engine may be directly provided by . A. large conical springs B. compressed air pressure C. hydraulic pressure D. exhaust gas pressure 3. One of the factors limiting the amount of toad which can be put on a modem marine diesel engine is the . A. governor sensitivity B. exhaust temperature C. fuel injection pressure D. speed of the cam shaft 4. The desirable properties or a marine fuel oil should inc lude . A. high flash point and high viscosity B. low flash point and high viscosity C. low heating value and high sulphur content D. high heating value and low sulphur content 5. As the plunger moves upwards in the barrel, injection will commence once the plunger bas the spill ports and the pressure builds up. A. opened up B. closed off C. lined up D. taken off 6. In an auxiliary diesel engine bypass type lubricating oil system, the main lube oil pump forces . A. all of the oil used by the engine through a filter B. some of the oil used by the engine through a filter C. some of the oil used by the engine through a centrifuge D. all of the oil used by the engine through a centrifuge 7. Because the circulating water is in a closed loop, is installed to cater for expansion and contraction of the water at different conditions of operation. A. an expansion joint B. a drain tank C. a head tank D. a contraction tank 8. The high air velocity leaving the compressor of an exhaust gas turbocharger is converted to pressure in the . A. inlet nozzle ring B. turbine wheel blade C. diffuser passages D. inlet volute 9. is usually driven by the engine camshaft and supplies pilot air to the cylinder air start valve. A. An air receiver B. An operating valve C. An automatic valve D. An air distributor 10. Diesel engines driving alternators operating in parallel must maintain a set frequency regardless of load changes. The governor characteristic used to accomplish this is known as . A. actuation B. sensitivity C. compensation D. promptness 11. By comparing the exhaust gas temperature of each cylinder, the operator can determine if the load is balanced throughout the engine. The device most commonly used is a . A. tachometer B. pyrometer C. dynamometer D. calorimeter 12. When the ship is going to enter into the harbor, ____. A. change from heavy fuel oil to diesel oil for main engine B. pumping out bilge water C. change sea chest from high level one to lower level one D. test emergency generator 13. If the jacket water temperature rises rapidly above normal in a diesel engine, you should first . A. place standby cooler in operation B. reduce engine toad C. check thermostatic valve D. clean sea water strainer 14. Air cocks, usually positioned at the in a circulating system, is used to get rid of the air in the system. A. bending joint B. expansion tank C. weld D. the highest point 15. Which of the following conditions could contribute to the cracking of a diesel engine cylinder head? A. Leaking seal ring B. Insufficient heat transfer from the exhaust valves C. Blocked cooling water passages to the head D. Excessive scavenging air provided to the engine 16. of an engine crankshaft can be detected by measuring deflections of' crank webs for each unit of the engine. A. Misalignment B. Length C. Strength D. Stresses 17. can be a direct cause of faulty operation of diesel engine fuel injection nozzles. A. Excessive fuel nozzle holder cooling B. Sediment in the fuel supply C. Distortion of the fuel spray pattern D. Improper atomization of the fuel 18. When fuel is injected late into a diesel engine cylinder . A. the exhaust will be clear B. fuel consumption will be low C. all the fuel will be burned at top dead center D. fuel consumption will be high 19. A large change in ambient temperature, or using an oil of a viscosity different than the one recommended by the manufacturer in a mechanical hydraulic governor, will result m the need to adjust the . A. pilot valve opening B. compensating needle valve C. compensating spring tension D. accumulator spring tension 20. Which of the following factors tends to increase scale formation on the saltwater side of a heat exchanger used in a diesel engine cooling water system? A. Baffle plates that have been bent during prior removal. B. Leaks m the cooler tube nest. C. Operating the engine while maintaining a high sea water outlet temperature. D. A punctured sea water strainer supplying cooling water to the heat exchanger. 21. If the scavenge fire is of a more major nature, if there is a risk of the fire extending or if the scavenge trunk is adjacent to the crankcase with risk of a hot spot developing it sometimes becomes necessary to the engine. A. stop B. start C. speed up D. slow down 22. In an operating diesel engine, which of the following conditions is an indication of a leaking air starting valve?
三管轮轮机英语大证考试真题41期
中华人民共和国海事局 2006年第3期海船船员适任证书全国统考试题(总第41期) 科目：轮机英语试卷代号：805 适用对象：无限、近洋航区3000KW及以上船舶二/三管轮 （本试卷卷面总分100分，及格分为70分，考试时间为100分钟） 答题说明：请选择一个最合适的答案，并将该答案按答题卡要求，在其相应位置上用2B铅笔涂黑。第1题至74题，每题1分，第75题至78题，每题1.5分,第79题至80题, 每题10分。 一、单项选择题 1. A diesel engine is similar to a gasoline engine except that the former has no ______. A. cross-head B. spark plug C. connecting rod D. cylinder 2. A diesel engine which is rated for normal operation at a crankshaft speed of 800 RPM, is commonly classed as a ______. A. slow-speed diesel B. medium-speed diesel C. high-speed diesel D. constant-speed diesel 3.Which of the diesel engine components listed increases air density and helps to improve engine operating efficiency? A. Impeller B. Compressor C. After-cooler D. Exhaust diffuser 4.For a given size engine, the two-stroke/cycle diesel engine will deliver more power than a four- stroke/cycle diesel engine because ______. A. it has a longer power stroke B. more air gets into the cylinder each stroke C. it develops twice as many power strokes at the same speed D. higher combustion pressure is developed 5.The intake valves in a diesel engine are reseated by ______. A. cam followers B. push rods C. combustion gases D. valve springs 6.According to the way the energy of the exhaust gases is utilized, pressure-charging can be divided into two main systems, namely, the constant-pressure system and ______. A. the pulse-phase system B. the pulse Doppler system C. the pulse system D. the pulse interval system 7.An over-speed safety device is usually fitted to a generator engine for______in the event of over- speed. A. cutting power off the engine B. increasing the fuel pump setting C. braking the crankshaft D. stabilizing the ship speed 8.What preventative maintenance should be done frequently to diesel engine starting air receivers? A. Drain the accumulated moisture. B. Test the relief valves. C. Watch the temperature to prevent fluctuations in pressure. D. Clean the interior to remove oil and foreign matter. 9.Immediately after any diesel engine is started, the engineer should check the ______. A. crankcase pressure B. lube oil pressure C. seawater pressure D. exhaust temperature 10. A controllable pitch propeller on a diesel driven vessel eliminates the need for ______. A. friction clutches B. disconnect clutches C. reversing gears D. reduction gears 11.In motor ship, ______is often used to recover some of the heat carried in the exhaust gases from the main engine. A. an diesel oil heater B. a waste heat boiler C. a fresh water generator D. a donkey boiler 12.An exhaust gas bypass is installed on a waste heat boiler in order to ______. A. bypass exhaust gas at high loads to prevent excessive back pressure B. bypass a portion of the exhaust gas at peak loads for better efficiency C. recycle exhaust gas to the turbocharger D. minimize moisture condensation in the boiler gas passages at low loads 13.Prior to lighting off a cold automatically fired auxiliary boiler, you should ______. A. check and regulate the water level B. close the air cock once fires are lit C. blow down the gage glass D. assure protective steam flow 14.Flame failure in an automatically fired auxiliary boiler can mostly result from a/an ______. A. incorrect electrode setting B. incorrect nozzle position C. clogged fuel nozzle D. broken high tension lead 15.Waterside scale in a fire-tube boiler may cause ______. A. increased heat transfer B. fireside erosion C. high steam demand D. overheated tubes 16.Which of the following will be the advantage of a centrifugal pump as compared with a reciprocating pump? I. Its discharge is continuous; II. It has no internal valves; III. Upon accidental closing of discharge valve, excessive pressure will not build up A. I, II B. II, III C. I, II, III D. II only 17.Why are removable sleeves installed on centrifugal pump shafts? A. They make it easier to replace the pump shaft packing. B. They can be economically replaced as they wear out. C. They can be removed when it is necessary to lighten the weight of the pump. D. They increase the strength of the shaft. 18.If one of the bilge system manifold valves does not properly seat, the ______. A. bilge well connected to that valve, plus the second bilge well being pumped will be completely emptied B. bilge system will lose vacuum and prevent the other bilges from being pumped out C. bilge well aft connected to that valve will siphon(虹吸) its contents to the forward bilge wells D. discharge pressure will be too high. 19.Which of the listed statements is correct concerning the starting of centrifugal pumps? A. They should always be started with the discharge valve closed. B. They should always be started with the discharge valve opened. C. A priming pump is always required to flood the impeller suction. D. They should always be started with the sealing line valves closed. 20.The simplest method to use for determining if a centrifugal pump is operating as designed, is to ______. A. closely observe the pump discharge temperature B. close off the discharge valve, and watch for a rise in pressure C. momentarily close off the suction valve, and watch for a rise in pressure D. use a clamp on ammeter and compare the readings to past records
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
《轮机英语》最新题库答案
《轮机英语》老题库答案 1. B 2. C 3. B 4. C 5. A 6. A 7. B 8. D 9. A 10. C 11. C 12. D 13. A 14. A 15. A 16. D 17. C 18. A 19. B 20. C 21. C 22. A 23. A 24. C 25. B 26. C 27. C 28. C 29. B 30. B 31. D 32. C 33. A 34. A 35. D 36. A 37. D 38. B 39. C 40. A 41. D 42. B 43. B 44. C 45. D 46. D 47. B 48. A 49. B 50. D 51. A 52. A 53. A 54. B 55. D 56. A 57. C 58. B 59. D 60. B 61. C 62. D 63. D 64. C 65. C 66. D 67. D 68. C 69. C 70. A 71. A 72. C 73. B 74. B 75. D 76. B 77. D 78. B 79. A 80. B 81. D 82. B 83. C 84. A 85. B 86. B 87. B 88. C 89. C 90. A 91. B 92. A 93. D 94. C 95. C 96. C 97. C 98. A 99. D 100. C 101. A 102. D 103. A 104. A 105. D 106. A 107. C 108. D 109. A 110. A 111. D 112. B 113. A 114. B 115. A 116. C 117. C 118. A 119. D 120. B 121. D 122. A 123. D 124. B 125. B 126. B 127. B 128. D 129. D 130. C 131. C 132. A 133. D 134. D 135. A 136. C 137. D 138. C 139. A 140. A 141. C 142. A 143. B 144. B 145. C 146. A 147. D 148. D 149. A 150. C 151. D 152. D 153. B 154. C 155. A 156. B 157. C 158. B 159. B 160. D 161. D 162. C 163. C 164. D 165. A 166. D 167. B 168. B 169. A 170. A 171. D 172. C 173. C 174. A 175. C 176. C 177. C 178. B 179. D 180. B 181. D 182. D 183. B 184. C 185. A 186. B 187. A 188. A 189. A 190. D 191. D 192. D 193. B 194. D 195. D 196. D 197. B 198. C 199. B 200. B 201. A 202. D 203. B 204. C 205. C 206. D 207. A 208. A 209. A 210. D 211. A 212. B 213. B 214. D 215. D 216. D 217. A 218. D 219. D 220. B 221. B 222. D 223. C 224. A 225. D 226. D 227. A 228. C 229. A 230. D 231. B 232. B 233. A 234. B 235. A 236. A 237. D 238. D 239. C 240. A 241. B 242. B 243. C 244. A 245. D 246. A 247. C 248. C 249. D 250. A 251. D 252. A 253. B 254. A 255. A 256. A 257. D 258. A 259. B 260. B 261. B 262. C 263. A 264. A 265. A 266. A 267. C 268. C 269. D 270. C 271. A 272. D 273. C 274. A 275. A 276. A 277. B 278. B 279. D 280. B 281. C 282. A 283. C 284. D 285. A 286. D 287. C 288. D 289. B 290. D 291. C 292. A 293. D 294. B 295. C 296. D 297. A 298. C 299. B 300. A 301. A 302. A 303. A 304. A 305. C 306. D 307. C 308. B 309. C 310. B 311. B 312. A 313. C 314. C 315. B 316. A 317. A 318. A 319. D 320. C 321. C 322. C 323. D 324. B 325. A 326. A 327. C 328. C 329. A 330. A 331. B 332. B 333. D 334. B 335. C 336. D 337. C 338. C 339. B 340. A 341. B 342. B 343. B 344. B 345. D 346. B 347. D 348. D 349. D 350. B 351. D 352. D 353. A 354. A 355. A 356. A 357. C 358. A 359. C 360. B 361. B 362. C 363. B 364. B 365. A 366. B 367. D 368. A 369. A 370. C 371. B 372. A 373. B 374. A 375. B 376. A 377. B 378. D 379. A 380. D 381. A 382. B 383. D 384. A 385. C 386. B 387. D 388. B 389. C 390. B 391. A 392. B 393. B 394. C 395. A 396. B 397. A 398. D 399. C 400. B 401. A 402. B 403. A 404. C 405. B 406. A 407. D 408. C 409. C 410. A 411. C 412. C 413. B 414. A 415. B 416. B 417. D 418. A 419. C 420. C