轮机英语各章节考点试题
1船舶主推进装置（19-20’）
1.1船舶动力装置概述
1.1.1船舶动力装置的组成和类型及对船舶动力装置的要求
1. Each type of engine has its application on board ship. The ____ main propulsion diesel engine operates on the two-stroke cycle.
A. low speed
B. medium speed
C. high speed
D. steam speed
1.2 船舶柴油机
1.2.1 船舶柴油机的基本特性
2. The cetane number of a diesel fuel oil indicates its ____.
A. viscosity
B. acid content
C. heating value
D. ignition quality
3. The operation between two fuel injections is called a ____.
A. turning cycle
B. working cycle
C. working hour
D. working stroke
1.2.2 船舶柴油机的工作原理和基本结构
4. The greatest turbulence in a diesel engine cylinder is created by the ____.
A. shape of the combustion chamber
B. fuel injection spray pattern
C. cylinder swept volume
D. degree of penetration of the fuel oil droplets
5. Because the tie bolts are so close to the crankshaft, some engines employ____ to hold the crankshaft main bearing cap in position instead of conventional studs and nuts.
A. through bolts
B. jack bolts
C. tap bolts
D. fitted bolts
6. ____for attachment to the propeller shaft also accommodates the turning gear and is integrally forged the crankshaft.
A. The coupling flange
B. The camshaft
C. The crosshead pin
D. The cylinder jackets
7. Which of the two events listed occurs simultaneously in a two-stroke \cycle diesel engine?
A. Exhaust and scavenging
B. Scavenging and compression
C. Ignition and expansion
D. Exhaust and compression
8. The rotary motion of a diesel engine piston crankshaft is obtained from the up and down motion of the piston via the _____.
A. camshaft
B. reduction gears
C. rocker arm
D. connecting or piston rod
9. Combustion gases formed in the cylinder of a diesel engine are prevented from blowing past the piston by___.
A. cylinder valve
B. compression rings
C. piston skirts
D. oil rings
10. On a large diesel engine installation, crankshaft axial alignment is maintained by the____.
A. piston rod guides
B. engine thrust bearing
C. crosshead bearing
D. main shaft flexible coupling
11. In a two-stroke cycle diesel engine, the process of scavenging begins as the ____.
A. piston nears and passes TDC
B. latter part of down stroke
C. piston passes BDC
D. early part of the down stroke
1.2.3 船舶柴油机的工作系统、操纵系统和控制系统
12._____controls the fuel oil temperature in order to provide oil at the correct viscosity for combustion.
A. The pressure switch
B. The temperature controller
C. The flow meter
D. The viscosity regulator
13. A___ ensures a constant pressure at the fuel line.
A. transfer pump
B. control air bottle
C. pressure regulating valve
D. non returning valve
14. Oil control rings used in two-stroke cycle diesel engines are located near the bottom of the piston
skirt in order to____.
A. increase the liner area covered by the oil film
B. maintain an oil film on the lower liner where scuffing is prevalent
C. keep excess oil away from intake and export ports
D. help cushion piston skirt side thrust by providing a hydrodynamic oil wedge
15. Under normal conditions, the main source of crankcase oil contamination is attributed to____. A. metal particles loosened by wear B. air when air cleaners are not used
C. condensation of water vapors
D. breakdown of the lubricating oil by dilution
16. The most common cause of lowering the crankcase lube oil flash point is____.
A. with a higher pressure
B. at a lower pressure
C. no more pressure
D. in a greater pressure
17. 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 valve
18. V ents are led from the engine to ___ for the release of air from the cooling water.
A. the cooling jackets
B. the head tank
C. the cooling water pump
D. the scavenging box
19. On opposite ends of a single shaft of a turbocharger 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
20. The supercharger takes air out of the surrounding atmosphere and then feeds it to the engine’s____.
A. inlet valves
B. exhaust valves
C. emergency valves
D. non-return valves
21. 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
22. When ____ is operated, a supply of pilot air enables the remote valve to open.
A. the distributor
B. the air start lever
C. the turning gear
D. the cylinder air start valve
23. A device which functions to bring a diesel engine to a full stop to protect it from damage is known is ____.
A. torque limiter
B. over-speed trip
C. over-speed governor
D. load limit governor
24. When the rev/min increases, the governor weights move___, causing subsequent motions.
A. inwards
B. out wards
C. upwards
D. downwards
25. The purpose of an after-cooler is to___.
A. reduce the turbocharger operating temperature
B. increase the pressure of the inlet air
C. increase the density of the inlet air
D. reduce the blower operating temperature
1.2.3船舶运行中柴油机的管理
26. 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 supplies
27. A diesel engine crankcase ventilation system____.
A. prevent spark generation
B. removes combustible gases
C. determines the level of combustible gases
D. provides inert gas generation in crankcase
1.3船舶推进装置
1.3.1 船舶推进装置的传动方式
28.____ is used to prevent the entry of sea water to the machinery space.
A. A special sealing gland
B. Propeller
C. Tailshaft
D. Sterntube bearing
2船舶辅助机械（30’）
2.1 船用锅炉
2.1.1 船用锅炉的类型
29. In a ___ boiler the water flows through the inside of the tubes while the hot gases pass around the outside.
A. water-tube
B. fire-tube
C. exhaust gas
D. none of the above
2.1.2 船用锅炉的结构特点
30. Soot blowers should be used in proper sequence so that____.
A. excess stresses will not be set up in the boiler
B. the decks will not be covered with soot
C. the soot will be swept toward the uptakes
D. there will not be a loss of steam pressure
2.1.3 船用锅炉的运行管理
31. The boiler feed pump discharge pressure is higher than the steam drum pressure to___.
A. ensure feed water flow into the boiler
B. keep the steam drum pressure high
C. prevent the water hammer in the feed line
D. help the feed water flash to steam
2.1.4 船用锅炉的故障分析和排除
32. 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
33. Flame failure in an automatically fired auxiliary boiler can from a(an)___.
A. incorrect electrode setting
B. incorrect nozzle position
C. clogged fuel nozzle
D. broken high tension lead
2.2 船用泵
2.1.1 船用泵的类型
34. A vane pump belongs to ____ according to its working principle.
A. reciprocating pump
B. positive displacement pump
C. centrifugal pump
D. centripetal pump
2.1.2 常见船用泵的工作原理和结构特点
35. The amount of fluid delivered by a gear pump can be regulated by_____.
A. throttling the pressure line
B. changing the speed of the rotor
C. Either A or B
D. None of the above is true
2.2.3 船舶通用泵系的布置原则和特点
36. Which of the valve \s listed will be cycled from the fully open to fully close when the handle is turned 90 degree?
A. A rising stem gate valve
B. A globe stop valve
C. A check valve
D. A butterfly valve
2.2.4 常见船用泵的运行管理和故障排除
37. A spur gear pump should be operated with the discharge valve____.
A. slightly opened
B. throttled
C. fully opened
D. halfway opened
38. Pitting in the suction areas of a centrifugal pump bronze impeller is usually caused by___.
A. cavitation
B. electrolysis
C. abrasion
D. corrosion
2.3 船舶制冷和空调装置
2.3.1 制冷原理和制冷循环
39. Refrigerant entering the compressor of a refrigeration system should be in which of the following conditions?
A. Sub-cooled liquid
B. Sub-cooled vapor
C. Superheated vapor
D. Liquid
2.3.2 船用空调系统的组成及主要设备
40. The process of removing moisture from air is known as___.
A. humidification
B. dehumidification
C. vaporization
D. evaporation
2.3.3 船舶空调装置运行管理
41. As the amount of moisture in the air increases, the difference between the dry bulb and the wet bulb temperature will ____.
A. increase
B. decrease
C. remain unchanged
D. be greatest at dew point
2.4 船舶防污染设备
2.4.1 油水分离器的工作原理及运行管理
42. Oily water separators are used to ensure that ships don’t discharge oil when pumping out____.
A. ballast water
B. boiler water
C. bilge water
D. sewage water
43. Where an excessive level of contamination is detected an alarm is sounded and diverting valves are operated. The discharging liquid is then passed to____.
A. overboard
B. a bilge well
C. a slop tank
D. a hot well
2.4.2 焚烧炉的工作原理及运行管理
44. Which of the following would not be burnt in an incinerator on board?
A. waste oil
B. waste clothes
C. oil rags
D. waste food
45. The solid waste was charged into the incinerator through_____.
A. the solid waste dump chute
B. an access door
C. the same way for waste oil burners
D. a charging opening
2.4.3 生活污水处理装置的工作原理及运行管理
46. When anaerobic bacteria convert the sewage to an inert sludge, ____.
A. no oxygen is needed
B. oxygen is necessary
C. oxygen is given off
D. no gas is produced
2.5 分油机、空压机和海水淡化装置
2.5.1 分油机的工作原理及运行管理
47. For a purifier, changing to a gravity disc with larger hole diameter will move the interface towards the _____.
A. bowel periphery
B. bowel center
C. upper surface
D. lower surface
48. When finish working on the separator you should ____ firstly.
A. cut off the power
B. cut off the oil inlet
C. open guide water valve
D. close oil outlet valve
49. Sediment collects in a tubular purifier____.
A. on the top cover
B. on the discs
C. in drain line on the disc
D. on sides of bowl
2.5.2 空压机的原理及运行管理
50. Compressed air is supplied by air compressors to____.
A. the air receivers
B. the starting valves
C. the cylinder covers
D. the distributors
2.5.3 海水淡化原理
51. The advantages of flash type evaporators, as compared to submerged tube type evaporators, include_____.
A. less internal corrosion because of lower brine density
B. higher temperature evaporation for lower salinity of the distillate produced
C. less scale formation in a flash evaporator
D. less feed-water required for a flash evaporator
52. A salinity indictor is used to determine the ____.
A. cause of salt contamination
B. location of salt water contamination
C. chemical makeup of feed-water
D. level of alkalinity in condensate
2.6 船舶甲板机械
2.6.1 液压泵、控制阀件和油马达的机构特点
53. _____ can be used to prevent hydraulic system overload or keep the pressure of oil outlet from pump constant.
A. Overflow valve
B. Reducing valve
C. Balancing valve
D. Reducing valve or balancing valve
54. Among the basic categories of equipment, which of the following is used to convert hydraulic energy into continuous rotary motion?
A. Hydraulic pump
B. V alve
C. Hydraulic cylinder
D. Hydraulic motor
2.6.2 起货机的机构特点及其故障分析和排除
55. The oil in a cargo winch gear box should be sampled periodically to____.
A. prevent the gear box from leaking
B. prevent the oil from becoming inflammable
C. make sure it has not become contaminated
D. make sure the motor bearings are lubricated
2.6.3 锚机的结构特点及其故障分析和排除
56.____are used to handle anchors and chains.
A. Cargo winches
B. Mooring winches
C. Windlass
D. Cargo hatches
2.6.4 绞缆机的结构特点及其故障分析和排除
57. Winch gears must be maintained in proper alignment to prevent____.
A. overheating of the lube oil
B. over speeding of the motor
C. wear on the braking system
D. damage to the teeth
2.6.5 液压系统的管理
58. Before doing any work on the hydraulic system equipped with accumulators, you should____.
A. drain any accumulators and purge with oxygen
B. bleed off all stored energy from the accumulators completely
C. charge the accumulators to prevent the system energy loss
D. pump the hydraulic fluid into the accumulators to prevent fluid loss.
59. Hydraulic machinery failures are commonly caused by contamination of the hydraulic fluid and___.
A. fluid friction
B. fluid turbulence
C. component misalignment
D. pressure surges
3 船舶电气(12’)
3.1 船用发电机
3.1.1 船用发电机结构特点
60. In an alternating current electrical system, a low system power factor is a direct sign of ____.
A. wasted energy
B. efficiency operation
C. a short in the exciter field windings
D. an excessive number of minor system grounds
61. With a purely ____ load the voltage and current are in phase, giving a power factor of one.
A. inductive
B. resistance
C. combined
D. capacitate
3.1.2 船用发电机的并车和解列
62. If two A.C. generators are to be operated in parallel, the load is distributed evenly by ____.
A. means of rheostat
B. a balance coil
C. adjusting the governor settings
D. changing excitation
63. The operation of ___ two alternators requires the voltages to be equal and also in phase.
A. paralleling
B. series-mounting
C. running
D. control
3.1.3 船用发电机的故障分析和排除
64. Accidental grounds in a shipboard electrical system must be repaired as soon as possible as they will___.
A. result in immediate power outages
B. damage circuit breaker
C. appear on the ground detection system
D. damage insulation and may cause outages
3.2 船用配电板的分类及组成、应急配电板、配电箱
65. ____ is not a part of the main switchboard on board.
A. Busbar
B. Load panel of main generator
C. Paralleling panel
D. Shore connecting box
66. Usually, emergency electricity supplies to____ on board.
A. cargo winches
B. windlass
C. steering gear
D. main air compressor
67. Shore power must be ___ during dock repair.
A. disconnected
B. switched off
C. cut off
D. connected
3.3 船舶电气设备
3.1.1 船舶电气设备概况
68. An ohmmeter can be used to measure____.
A. current flow in a circuit
B. voltage between two points in a circuit
C. circuit continuity
D. power
3.2.2 电气控制设备
69.Electrical circuits are protected against overheating by means of a(an)____.
A. circuit breaker
B. amplifier
C. diode
D. capacitor
3.2.3 电气设备的运行管理
70.Sparking at the brushes of a running motor could be an indication of ___.
A. normal operation
B. dirty commutator
C. increased brush capacity
D. water vapor absorption
71. All of the following operating characteristics are listed on the name plates of the motors used on board ship except the ___.
A. temperature rise
B. horsepower
C. input kilowatts
D. operating voltage
4 船舶轮机管理
4.1操作规程
4.1.1 备车
72. One hour before sailing, the duty engineer and officer should check____.
A. tachometer and engine telegraph
B. oil and water reserves
C. clock and engine telegraph and test the rudder
D. crews
4.1.2 巡回检查
73. Which of the following item is the cause to the damage of parts and excess wearing?
A. overload
B. the odds of the load
C. the default of load
D. overload and the odds of the load
4.1.3 完车
74. 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
4.2 安全管理知识
4.2.1 轮机部操作安全注意事项
75. To avoid excessive surge pressure when bunkering, you should ____.
A. bunker at normal rate
B. check for kicks in hose
C. close valves slowly
D. shut valves before topping off
4.2.2. 船舶防火防爆的措施及守则
76. The most likely place for a fire to start trough the process of spontaneous combustion is in __.
A. an electrical switchboard
B. the pressure tanks
C. the fuel oil tanks
D. the oily rag bin
4.2.3 机舱应急设备的使用及管理
77. If the overflow tank high-level alarm sounds while the fuel oil tanks are being topped off, the engineer should____.
A. close the static leg filling valve
B. close the overflow tank filling valve
C. reduce the fuel oil pumping rate
D. stop the fuel oil pumping operation
78. As a duty engineer, as soon as you hear the fire and emergency signal, you should ensure that___.
A. ring buoys are thrown overboard
B. engines are stopped
C. fire pump are started
D. life preserver have been issued to everyone
79. Following agrounding, you can best determine that a SLACK fuel oil tank has been holed by ____.
A. sounding the tank
B. waiting for the vessel to list
C. examining tank boundaries
D. checking fuel oil strainers
4.2.4 船员个人安全知识
80. Which one might be used most likely in case of a fire?
A. Life jacket
B. SCBA
C. Lifeboat
D. Torch
4.3 油、物料和备件的管理
81. The flash point of a petroleum product is an indication of its____.
A. viscosity
B. pour point
C. volatility
D. lower explosive limit
4.4 船舶修理和检验
4.4.1 修理的类别
82. ______, 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. V oyage repair
B. Routine docking
C. Damage repair
D. Concersion
4.4.2. 轮机坞修工程
83. When a ship in the dock repairing, engine department should emphasize on the inspection of ____.
A. sea valve chest, sea valve, thruster
B. steering and shafting system
C. sea water system
D. fresh water system
4.4.3 船舶检验的类别与作用
84. The additional mark____ in the Classification Certificate for Machinery means propulsion apparatus is remotely controlled on the navigation bridge control station, and engine assembly control station is unmanned periodically.
A. BRC
B. MCC
C. AUT-0
D. AUT-1
4.5 防污染管理及PSC检查
4.5.1 油类记录薄与IOPP证书
85. If an incorrect entry were made in the Oil Record Book, you should_____.
A. erase the entry and rewrite it
B. notify the ship’s officer- in-charge
C. completely black it out and make the correct entry alongside
D. draw a single line through the wrong entry and initial it.
86. The valid period of the IOPP on board isn’t more than ____.
A. one year
B. two years
C. four years
D. five years
4.5.2 PSC检查中的明显理由与更详细检查
87.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 SCO believes the ship doesn’t meet the requirements
D. the PSCO can’t find deficiencies at first glance
5 国际公约与规则(13’)
5.1 STCW公约
5.1.1 STCW78/95公约中有关轮机值班的基本原则
88. STCW78/95 states that the officer in charge of the engineering watch is the _____ representative.
A. ship-owner’s
B. master’s
C. chief engineer’s
D. manager’s
89. At an unsheltered anchorage the chief engineer officer shall consult with the master whether or not to _____.
A. do engine repair work
B. clean sear water filter
C. maintain an underway watch
D. take bunkering
5.1.2 轮机员的基本职责和道德
90. Who is in the charge of the auxiliary boiler?
A. The chief engineer
B. The second engineer
C. The third engineer
D. The fourth
5.1.3 驾机联系制度
91. The bridge should the engine room ___ before passing through congested o shallow waterway.
A. 24 hours
B. 2 hours
C. 1 hour
D. 15 minutes
5.2 MARPOL73/78公约
5.2.1 MARPOL73/78公约中有关含油污水的排放规则
92. While loading bunkers, you notice oil on the water near the vessel,. What should you do first?
A. Stop loading
B. Notify the harbor administration
C. Determine if the vessel is the source of the pollution
D. Start the main engine and put them in gear to disperse the spill
93. If an oil spill occurs on deck, you should_____.
A. cover the area with foam
B. cover the area with absorbent material
C. wash down immediately with a fire hose
D. wash down immediately with an oil dispersing solvent.
94. To receive oil residues from the purification of fuel and lubricating oils in the machinery spaces, what kind of tanks should be provided on board?
A. Bilge tank
B. Sludge tank
C. Overflow tank
D. Oil collecting tank
5.2.2 有关国家、港口的防污染规则
95. Disposal of all kinds of garbage but_____ is prohibited within Special Area.
A. plastics
B. comminuted or ground papers, rag , glass, metal etc.
C. food waste comminuted or ground
D. incinerator ash
96. When the garbage is mixing 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
5.3 SOLAS 公约
5.3.1 SOLAS 公约的基本精神和基本原则
97. The SOLAS Convention is the main international convention____.
A. about marine pollution prevention
B. covering safety of life
C. about marine
D. about ship and port security
5.4 ISM、ISPS等规则和公约
5.4.1 ISM 规则简介
98. In the ISM Code, “company” doesn’t mean___.
A. the ship owner
B. the manager or bareboat charterer
C. a person assuming the responsibility for ship operation
D. a business enterprise dealing with freight
5.4.2 ISPS 规则简介
99. _____ shall set security levels and provide guidance for protection from security incidents.
A. The Contracting Governments
B. The Port Authorities
C. The master
D. The Company Security Officer
5.4.3 其他最新公约和规则
100. According to Maritime Labour Convention, 2006, the maximum hours of work shall not exceed__.
A. 14 hours in any 24-hour period
B. 72 hours in any seven-day period
C. 10 hours in any 24-hour period
D. 88 hours in any seven-day period
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
第32期轮机英语考试题
中华人民共和国海事局 2003年第3期海船船员适任证书全国统考试题(总第32期) 科目：轮机英语试卷代号：801 适用对象：无限、近洋航区3000KW及以上船舶轮机长 （本试卷卷面总分100分，及格分为70分，考试时间为100分钟） 答题说明：请选择一个最合适的答案，并将该答案按答题卡要求，在其相应位置上用2B铅笔涂黑。第1题至68题，每题1分，第69题至76题，每题1．5分,第77题至78题, 每题10分。 一、单项选择题： 1．______ is fully floating in both connecting rod small end and the piston skirt．A． The piston rod B． The cross head pin C． The gudgeon pin D． The crank-pin 2．When we say that two objects have relative motion, we mean ______． A． the distance between them remains the same B． the distance between them is changing C． the position between them is not changing D． their positions to the earth remain the same 3．The ______ or balance tank collects the re-circulated fuel oil． A． buffer B． sump C． bilge D． overflowing 4．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 with water or water vapor． 5．The main bearing metal is a lining ______． A． inside the bearing B． outside the bearing C． covering the crankshaft D． none of the above 6．______ neutralizes the acid conditions and ______ cleanses the rings and grooves．A． The detergency/the alkalinity B． The alkalinity/the detergency C． The inhabitant/ the water D． The additives/the distilled water 7．In a central cooling system, used in some modern ships, sea water is supplied to cool ______ which will circulate to other individual cooler, greatly reducing the corrosion problems． A． fresh water B． sea water C． cooling oil D． emulsion 8．An electrically driven automatically operating auxiliary blower is provided for slow speed and ______ of a low speed diesel engine． A． manoeuvring operations B． bad combustion C． cooling D． mooring trial 9．The average exhaust temperature of a two-stroke/cycle diesel engine with a turbine-driven supercharger is lower than a similar four-stroke/cycle diesel engine at equal loads because _______． A． two-stroke/cycle diesel engines have a higher M．E．P． than four-stroke /cycle diesel engines B． four-stroke/cycle diesel engine exhaust is cooled by scavenging air C． two-stroke/cycle diesel engines have a lower M．E．P． than four-stroke/cycle diesel engines D． the opening of the two-stroke/cycle diesel exhaust ports or valves occurs much later than in four-stroke/cycle diesel engines 10．Engine speeds at which resonance can occur are termed ______． A． maximum speeds B． full speeds C． sea speeds D． critical speeds 11．When the propeller blades are integral with the hub, the propeller is called a______．A． built up propeller B． solid propeller C． controllable pitch propeller D． suction back propeller 12．The timing of the injection can be altered by raising or lowering the pump ______in relation to the cam． A． needle valve B． cylinder C． piston D． arm rod 13．______ are commonly used in mechanical-hydraulic governor to sense engine speeds．A． Bulbs B． Bulks C． Flyweights D． Flywheels 14．When ______is operated, a supply of pilot air enables the remote valve to open．A． the distributor B． the air start lever C． the turning gear D． the cylinder air start valve 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．All of the diesel engine cylinder firing pressures are normal, yet all of the exhaust temperatures are low． Which of the following situations is responsible for this condition? A． Excessively early injection timing B． Combustion knock． C． Leaking piston rings．D． Light load． 17．The mechanical efficiency of an engine is always less than 100% _____ losses occurring in the form of friction. A. because B. since C. due to D. owing 18．In reducing engine speed to an efficient propeller speed by the use of reduction gears, ______．A． speed and torque are both reduced B． speed is reduced and torque remains unchanged C． speed is reduced and torque is increased D． speed is sometimes unchanged while torque is increased 19．The ab breviation “TDS” about the potable water probably means ______． A． total dissolved solids B． temperature of distillation of sea water C． total dissolved sodium D． total delivery system 20．Gear pumps are of positive displacement type pumps because they discharge a near constant amount of liquid ______ pressure． A． depending on B． in relative to C． regardless of D． because of
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