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1、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：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15分，第77题至78题， 每题10分。一、 单项选择题1. The _ engine is used for alternators and some times for main propulsion with a gearbox t
2、o provide a propeller of between 90 to 120 rpm. A. two-stroke B. four-stroke C. slow speed D. reversible2. If all other conditions such as bore, stroke, speed, and mean effective pressures are equal, a two-stroke/cycle diesel engine will develop approximately _. A. the same indicated horsepower as a
3、 four-stroke/cycle engine B. twice the indicated horsepower as a four-stroke/cycle engine C. one half the indicated horsepower as a four-stroke/cycle engine D. one power stroke for every two crankshaft revolutions 3. Before being used the fuel service tank should be drained of _. A. soda solution B.
4、 mechanical impurities C. ballast D. water and residuals 4. A governor automatically controls engine speed by regulating _. A. fuel supply B. firing order C. engine load D. oil level 5. _fuel oils _lubricating oils require treatment before passing to the engine. A. Both/and B. Neither/nor C. Either/
5、or D. Both/or 6. _tappet clearance will cause the exhaust valve to open early and close late in cycle and will increase its maximum lift.A. Excessive B. Insufficient C. Correct D. Excessive or insufficient7. Measure _by means of lead wire. A. the clearance of the main bearing B. the diameter of main
6、 bearing C. the gap of main bearing D. the tolerance of main bearing 8. Increasing the valve clearance between a valve stem and rocker arm, will result in the valve _. A. closing later B. opening sooner C. staying open for a shorter period of time D. staying open for a longer period of time 9. A com
7、mon trouble with the fuel pump plunger or fuel valve spindle is _. A. water leakage B. steam leakage C. oil leakage D. air leakage 10. If _are taken at regular intervals, any unequal distribution of load will be easily found out. A. differential of crank-webs B. indicator diagrams C. lube oil readin
8、g out D. misalignment of crank-throws 11. Immediately after starting a diesel engine, normal raw water and jacket water pressures are indicated. However, the jacket water temperature continues to rise. If there is no change in the sea temperature, you should suspect _. A. overloading in all cylinder
9、s B. a jammed three-way thermostatic valve C. chromate pH too low D. a high level in the surge tank 12. One method of constructing large marine diesel engines and reducing the total engine frame weight is through_. A. casting interlocking components B. welding plates to form sections for assembly C.
10、 forging integral components D. case hardening integral components 13. _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 14. A large low speed main propulsion diesel engi
11、ne may become overloaded by_. . a heavily fouled hull . strong head winds and heavy seas A. only B. only C. bothand D. neithernor 15. Wear occurring at the tips of the reduction gear teeth is usually the result of _. A. surface fatigue B. fretting corrosion C. heavy overloading D. gear misalignment
12、16. The water in a steaming auxiliary boiler should be tested daily for _. A. dissolved oxygen B. chlorides (氯化物) C. sludge D. dissolved nitrogen 17. The most common cause of scale formation in an auxiliary boiler is _. A. concentrations of calcium sulfate in the boiler water B. fuel oil in the feed
13、-water improper C. treatment of the feed-water with calcium sulfate D. excessive feed-water alkalinity 18. You are unable to pump out the aft starboard engine room bilge well that is fouled, with one foot of water over the top of the bilge well, what action should be carried out? A. Send the wiper i
14、nto the well with only a scoop and pail. B. Remove the bilge manifold valve and attempt to back flush the line. C. Simultaneously operate all available bilge pumps. D. It is only necessary to transfer half the contents of a drum of degreaser into the bilge well. 19. If a centrifugal pump vibrates an
15、d is noisy when operating, the cause could be _. A. worn gland sealing shaft B. worn wearing rings C. a bent shaft D. reversed pump coupling 20. In reference to air conditioning, when air attains the maximum amount of moisture it can hold at a specific temperature, it is said to be _. A. superheated
16、 B. saturated C. condensed D. convected 21. Short cycling of a refrigeration compressor refers to _. A. frequently grounding out B. frequently starting and stopping C. running too fast D. running too slow 22. If a refrigeration system were short of refrigerant, the condition would result in _. A. co
17、ntinuous running of the compressor B. high suction pressure C. high discharge pressure D. short cycling of the compressor on the water failure switch 23. Sludge may form in the lubricating oil crankcase of a reciprocating air conditioning compressor as a result of _. A. wax precipitation in the lube
18、 oil B. contamination by dust, scale, or moisture C. refrigerant bubbles in the lube oil D. refrigerant reducing the lube oil viscosity 24. When started, a complete oily water separating unit is first filled _. A. with dirty water B. with clean water C. by oily water D. by mixed water 25. The oil sl
19、udge is burnt in the _onboard. Ill show you the ashes. A. boiler B. main engine C. auxiliary engine D. incinerator 26. In sewage treatment, the term maceration refers to the process of _. A. breaking up solid matter into fine particles B. precipitating non-decomposed waste in a collection tank C. ch
20、emically adjusting the sewage pH to 7.0 D. eliminating bacterium coli (大肠杆菌) from the sewage 27. The _of the gravity disc is too big. It cause oil to flow through the water outlet. We changed the disc and no oil is found in the water outlet. A. gravity B. diameter C. circumference D. cylinder 28. Th
21、e 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-wate
22、r required for a flash evaporator 29. In a radial piston pump, reversal and control of fluid flow are accomplished by moving the _. A. central valve B. radial plunger C. floating ring D. cylinder body30. Winch gears must be maintained in proper alignment to prevent _. A. overheating of the lube oil
23、B. over-speeding of the motor C. wear on the braking system D. damage to the teeth 31. Air trapped in the hydraulic fluid of a steering system may be indicated by _. A. the steering pumps overspeeding B. a jammed open relief valve C. a constantly occurring improper rudder response D. excessive ram p
24、ressure 32. 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 33. The frequency output of an operati
25、ng alternator is controlled by the _. A. relative speed of the rotor poles B. number of turns of wire in the armature coil C. strength of the magnets used D. output voltage 34. An alternator is being paralleled with one on the line. At the instant the circuit breaker is closed, the frequency of the
26、incoming alternator will normally _. A. increase B. not change C. decrease D. be exactly 60 hertz 35. When securing an AC generator, 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 t
27、he unit 36. _is provided to alternators, in the event of prime mover failure to ensure that the alternator does not act as a motor. A. Reverse current protection B. Reverse power protection C. Synchronising device D. Frequency meter 37. A transformer in an electric circuit serves to _. A. generate i
28、ts own electrical power B. transform electrical energy into mechanical energy C. increase or decrease circuit voltage as required D. convert AC to DC 38. Electric circuits are protected against short circuits by means of a/an _. A. diode(二极管) B. amplifier C. circuit breaker D. capacitor 39. The need
29、 for insulation cleaning may be determined by _. A. visual inspection for dirt accumulation B. high megger readings C. low operating temperature D. the time period since the last cleaning 40. A circuit breaker and a fuse have a basic similarity in that they both _. A. can be reset to energize the ci
30、rcuit B. should open the circuit when overloaded C. will burn out when an over current flow develops D. should short the circuit when overloaded 41. Bourdon Tube is probably the most commonly used _ measuring instrument. A. the absolute pressure B. the gauge pressureC. the vacuum pressure D. the dif
31、ferential pressure42. A manometer is used to measure_. A. pressure B. temperature C. volume D. specific gravity 43. The two most common gases used in pneumatic systems are _. A. compressed air and nitrogen B. helium(氦) and nitrogen(氮) C. oxygen and hydrogen (氢) D. oxygen and acetylene(乙炔) 44. With U
32、MS, when the engine room is unwatched, _will control the main engine. A. the bridge officer on watch B. the chief engineer C. the duty engineer D. the duty motorman 45. After the order _ is given, the air system is shut down, the turning gear put in. A. Finished With Engine B. Stop The Engine C. Sta
33、nd-by Engine D. Slow-down Engine 46. A tank has been sealed and unventilated for a long period of time. Which of the following conditions does this indicate? A. The tank is safe to enter. B. The tank is especially dangerous to enter. C. Carbon monoxide is present. D. Water vapor present when the tan
34、k was sealed has oxidized. 47. A class C fire is burning _. A. diesel oil B. magnesium C. dunnage D. electrical insulation 48. Radiation can spread a fire by _. A. transmitting the heat of a fire through the ships metal B. burning liquids flowing into another space C. heated gases flowing through ve
35、ntilation systems D. the transfer of heat across an unobstructed space 49. Why should you wear a self-contained breathing apparatus before entering the engine room after the fixed CO 2 system has been discharged to combat a major fire? A. Because carbon dioxide dilutes the oxygen concentration in th
36、e atmosphere and may cause asphyxiation. B. Because carbon dioxide breaks down in a fire into carbon monoxide which may cause blood poisoning in the person breathing this gas. C. Because carbon dioxide is a colorless and odorless gas that becomes highly toxic in the presence of high temperatures and
37、 will quickly incapacitate a person exposed to this gas. D. This action is unnecessary as carbon dioxide is not poisonous nor toxic but is a relatively harmless gas. 50. Diesel fuel vapors _. A. can not be ignited by a spark unless the vapor is in a confined space B. are nontoxic （无毒的）in all concent
38、rations C. can not be ignited by a spark unless they are at their auto-ignition temperature D. are heavier than air 51. While loading bulk oil, you notice oil on the water near the barge. Which of the following actions should you carry out FIRST? A. Search the vessel for leaks B. Notify terminal sup
39、erintendent C. Stop loading D. Notify the Coast Guard 52. Which lubricating oil additive is used in diesel engines to reduce the tendency for sludge and varnish to form on the engine parts? A. Flash point improvers B. Pour point improvers C. Inhibitors D. Foam suppressors 53. Which of the following
40、functions are chemical treatments for cooling water system designed to do? A. Minimise corrosion, prevent deposits and scaling, and control of biological growths. B. Increase design heat transfer coefficients(系数). C. Decrease the amount of cooling water required. D. Increase the amount of cooling wa
41、ter required. 54. When a vessel is in dry-dock, the vessels engineers should _. A. examine the condition of the propeller B. chip and paint all hull protection zincs C. install new docking plugs in all cofferdams D. inspect the hull for hogging or sagging 55. _is a series of trials done at sea to de
42、termine whether the ship has met the specifications of design, modification, or repair. A. SEA WORTHINESS B. SEA TRIALS C. TRIAL-AND-ERROR D. DOCK TRIALS 56. The certificate for the refrigerating plant will _soon. Id like to extend its validation now. A. update B. finish C. outdated D. expire 57. Wh
43、ich of the following operations need to be entered on the Oil Record Book Part ? . Ballast of fuel oil tanks. . Condition of oil discharge monitoring and control system.A. only B. only C. bothand D. neithernor58. The International Sewage Pollution Prevention Certificate shall be issued for a period
44、specified by the Administration, which shall not exceed _from the date of issue. A. six months B. one year C. three years D. five years 59. If the PSCO from general impressions or observations on board has _for believing that the ship, its equipment or its crew do not substantially meet the requirements, the PSCO should proceed to a more detailed inspection. A. clean report B. serious deficiencies C. clear grounds D. detention report 60. The fire drill must, as far as practicable, be conducted