轮机三管轮考证英语43期试题加答案(共4页).doc

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1、精选优质文档-倾情为你奉上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/

2、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 nu

3、mber 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. _ c

4、ontrols 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. g

5、ood 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

6、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 viscosit

7、y 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 th

8、rough 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 highC.feed-water flow is low D.wat

9、er 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.

10、 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

11、16. Some pumps use packing as sealing gland. The gland should be _. A. slack enough to allow slight leakage of fluid B. slightly chocked C. brought up tight so as not to allow any leakage D. fitted with a relief valve 17. A spur gear pump should be operated with the discharge valves _. A. slightly o

12、pened B. throttled C. fully opened D. halfway opened 18. Compared to globe and angle valves, gate valves _. A. are more suitable for throttling B. operate with little or no pressure drop when fully opened C. are more easily repaired D. cannot be used for service requiring infrequent operation 19. An

13、 increase in rotor clearances in a rotary pump will _. A. increase discharge pressure B. decrease pump capacity C. decrease pump cavitation D. decrease reaction ring clearance 20. The usual symptoms of cavitation in a centrifugal pump is _. A. noise and vibration B. an increase in discharge pressure

14、 C. an increase in suction pressure D. lifting of the relief valve 21. 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 22. _is the circulation and refreshing of the a

15、ir in a space without necessarily a change of temperature. A. Refrigeration B. Air conditioning C. Ventilation D. Heating 23. In an air conditioning system, moisture is removed from the air by _.A. filtersB. separators C. ducted traps D. dehumidifiers 24. Sludge may be formed in the oil in the crank

16、case of a reciprocating air conditioning compressor as a result of _. A. refrigerant bubbles in the lube oil B. refrigerant reducing the lube oil viscosity C. oxidation of the lube oil from overheating D. reducing the floc or cloud point of the oil 25. A high rate of separation between oil and water

17、 is favored by _.A. large size of oil globule B. low temperature C. high viscosity D. high flow rate 26. 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.

18、with clean water C. by oily water D. by mixed water 27. Which is the pollution prevention equipment? A. booster pump B. evaporator C. incinerator D. cooler 28. The _is used to burn oil sludge. A. clarifier B. oily water separator C. incinerator D. distiller 29. Oil water separators are used to ensur

19、e that ships dont discharge oil when pumping out _.A. ballast water B. boiler water C. bilge water D. sewage water30. When a clarifier is running the impurities and water collect at the bowl _.A. center B. periphery C. inlet D. upper parts 31. The separation of impurities and water from _ is essenti

20、al for good combustion of diesel engines. A. lube oil B. fuel oil C. turbine oil D. grease 32. Brine density in a distilling plant is measured with a/an _. A. psychrometer B. salinometer C. anemometer D. sphygmomanometer 33. The designed _ is 20 tons per day, but the fresh water generator can only d

21、istil 15 tons at present. A. displacement B. weight C. power D. capacity 34. _ play a very important part in hydraulic systems by preventing interaction between different parts of the hydraulic circuit. A. Motors B. Check valves C. Safety valves D. Reducing valves 35. In a radial piston pump, revers

22、al and control of fluid flow are accomplished by moving the _. A. central valve B. radial plunger C. floating ring D. cylinder body 36. In a ordinary cargo crane, _is fitted to rotate the crane. A. the slewing motor B. the luffing motor C. the hoisting motor D. the fan motor 37. Which problems can o

23、ccur if the brake band lining of a wildcat brake becomes excessively worn? A. The driving engine will over-speed. B. The anchor will immediately drop. C. The clutch will overheat. D. The brakes effectiveness will be reduced. 38. _ are used for hauling in or letting out the wires which fasten the shi

24、p to the shore. A. Cargo winches B. Mooring winches C. Windlasses D. Cargo hatches 39. Which of the following can be used in hydraulic transmission system? A. Hydraulic oil B. Animal oil C. Light oil D. Fuel oil 40. One factor that determines the frequency of an alternator is the _. A. number of tur

25、ns of wire in the armature coil B. number of magnetic poles C. strength of the magnets used D. output voltage 41. A DC generator is used to supply direct current in order to maintain an AC generator field and is known as a/an _. A. rotor B. stator C. exciter D. armature 42. When paralleling two AC g

26、enerators, the frequency of the machine coming on-line, immediately prior to closing its breaker, should be _. A. slightly less than the oncoming generator frequency B. the same as the bus frequency C. slightly greater than the bus frequency D. the same as the bus voltage 43. When securing an AC gen

27、erator, you should FIRST _. A. open the generator circuit breaker B. switch the voltage regulator to manual C. decrease the field excitation to minimum D. reduce the load on the unit 44. A generator is prevented from becoming motorized by the use of a/an _. A. over-speed trip B. reverse power relay

28、C. back pressure trip D. governor controls 45. The part of the shipboard electrical system used to control the distribution of power to the branch circuits is the _. A. bridge control panel B. disconnect links C. governor relay box D. main switchboard 46. Which of the listed sections of an emergency

29、 switchboard is used to supply power for alarm signals under emergency conditions? A. The generator and bus transfer section B. The 450 volt, 60 cycle, 3 phase bus C. The 120 volt, 3 phase, 60 cycle bus D. The 24 volt DC bus 47. The separate supplies are connected in either star or delta formation.

30、The star formation is most commonly used and requires _ slip-rings on the alternator. A. two B. three C. four D. five48. A fuse that blows often should be replaced only with a fuse of _. A. the recommended current and voltage rating B. higher current and voltage rating C. higher current and lower vo

31、ltage rating D. lower current and higher voltage rating 49. The overcurrent relay_ the motor contactor when the motor exceeds its rated current . A. connects B. trips C. fouls D. destructs 50. Electric circuits are protected against overloads and short circuits by means of a/an _. A. circuit breaker

32、 B. amplifier C. diode D. capacitor 51. Prior to starting an AC generator prime mover, the voltage regulator cutout switch should be placed in the _. A. manual position B. bus neutral position C. raise voltage position D. transfer position 52. Before M/E putting on the starting air, the reversing an

33、d control gear should be _. A. operated B. stopped C. checked D. removed 53. _ is a precaution which contributes to avoiding trouble under normal operating conditions. A. Constant inspection B. Keeping constant load C. Remaining constant temperature D. Varying speed 54. After “F.W.E.” is given, the

34、air system is shut down, the _ gear put in, all drains and indicator cocks opened, and the cooling water kept running. A. steering B. timing C. turning D. running 55. Which of the following must be eliminated to prevent accidents? A. Unsafe actions B. Orderliness C. Frequent inspections D. Good work

35、 habit/practices 56. A class Cfire would most likely occur in the _. A. engine room bilges B. main switchboard C. paint locker D. rag bin 57. The most likely place for a fire to start through the process of spontaneous combustion is in _. A. an electrical switchboard B. the pressure tanks C. the fue

36、l oil tanks D. the oily rag bin 58. While on watch in the engine room, you hear a continuous sounding of the general alarm. Which of the following actions should you take FIRST? A. Secure the burners then proceed to your assigned boat station. B. Start the fire pump and establish flow to the fire ma

37、in. C. Open the guardian valve and standby to maneuver. D. Open the master control valves on the fixed CO2 system. 59. A firemans outfit carried onboard cargo vessels, must have a _. A. canister-type gas mask B. fresh-air breathing apparatus C. self-contained breathing apparatus D. combustible gas i

38、ndicator 60. The safe rate of bunkering heavy fuel oil is directly related to the _. A. type of fuel transfer pump aboard B. temperature of the fuel oil being received C. size of the fuel storage tanks ashore D. distance from the fuel oil storage tanks ashore 61. To anneal a copper gasket, you shoul

39、d heat the gasket _. A. and quench it in oil B. cherry red and quench in water C. and let it cool slowly in the air D. and carbonize it 62. Preventive maintenance _.A. should not be carried out during the watches. B. can only be carried out in port. C. is a kind of maintenances carried out prior to

40、the occurrenceD. is a kind of maintenances carried out after the occurrence 63. 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

41、D. AUT-1 64. Which of the following machinery space operations is required to be logged in the Oil Record Book? A. Ballasting or cleaning of fuel oil tanks.B. Shifting suction of main fuel pump to reserve fuel oil tank.C. Changing out sprayer plates to adjust for steam demand.D. Daily inspection of

42、engine room bilges.65. The Port Authorities, in accordance with the IMO resolutions have been carrying out _ to enhance safety of ships. A. CPP B. FPP C. PSC D. FSC 66. 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 67. Duties shall be so organized by the chief en