轮机英语41期考试

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：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.

2、cross-head -B. spark plug C. connecting rod D. cylinder2. 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 compone

3、nts 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

4、 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. Acco

5、rding 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 system7. An over-speed safety device is u

6、sually 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. Dra

7、in 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 pressur

8、e 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 exhaus

9、t 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 ex

10、haust 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 of0f a cold automatically fired auxiliary boiler, you should _. -A. check and regulate the water level B. close th

11、e 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. Wa

12、terside 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 intern

13、al 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 re

14、placed 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 pum

15、ped 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 c

16、oncerning 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

17、 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 ri

18、se in pressure D. use a clamp on ammeter and compare the readings to past records 21. Which of the following modes of heat transfer does NOT require any physical contact between a warmer and a cooler substance? -A. Radiation B. Conduction C. Natural convection D. Contact directly 22. A re-heater in

19、an air conditioning system functions to _. A. control inlet air temperature B. control inlet air volume C. maintain relative humidity at 15% -D. restore conditioned air temperature to a comfortable level 23. In a chilled water air conditioning unit using a reciprocating compressor, the refrigerating

20、 effect of the primary refrigerant can be increased by _. A. increasing refrigerant pressure in the coil B. increasing chilled water flow through the cooler -C. sub-cooling the refrigerant in the condenser D. superheating the refrigerant in the compressor 24. Sludge may form in the lubricating oil c

21、rankcase of a reciprocating air conditioning compressor as a result of _. A. wax precipitation in the lube oil -B. contamination by dust, scale, or moisture C. refrigerant bubbles in the lube oil D. refrigerant reducing the lube oil viscosity 25. Placing a filter on the _of an oily water separator w

22、ill “polish” the discharge but overloading must be avoided. A. suction side -B. discharge side C. by-pass pipe D. sampling pipe 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 compartmen

23、t. A. with dirty water -B. 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. oil/water separator -C. incinerator D. distiller 29. Most marin

24、e biological sewage treatment plants consist of all the following statements except _.A. aeration tanks B. settling tanks C. disinfection agent （消毒剂） -D. anaerobic bacteria (厌氧菌)30. For a purifier changing to a gravity disc with smaller hole diameter will move the interface towards the _.A. bowl per

25、iphery -B. bowl center C. upper surface D. lower surface 31. 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 32. The advantages of flash type evaporato

26、rs, 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 33

27、. Distilled water from an evaporator may be discharged into a drinking water tank _. A. through a detachable hose connection B. after passing through an activated charcoal filter C. after chemical analysis shows it is fit for consumption D. through a solenoid operated three-way valve 34. What type o

28、f valve is used to direct the flow of hydraulic fluid? A. relief valve B. direction control valve C. stop valve D. pressure control valve 35. 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

29、body 36. In a general cargo crane, _is fitted to lift the cargo load. A. the slewing motor B. the luffing motor C. the hoisting motor D. the fan moter 37. _are used to handle anchors and chains. A. Cargo winches B. Mooring winches C. Windlasses D. Cargo hatches 38. The clutch band of a constant tens

30、ioning mooring winch must be set up tight enough to drive the winch drum and should slip only when _. A. excessive loads are placed on the winch B. minimum pull is being exerted by the winch C. automatic operation of the winch is desired D. wire is being retrieved at the maximum rate 39. Dual (双的)el

31、ectro-hydraulic steering units usually operate _.A. with both pumps on line at the same time Bwith one pump on standbyCwith the follow-up gear disconnected Donly when the rudder is moved amidships40. One factor that determines the frequency of an alternator is the _.A. number of turns of wire in the

32、 armature coil B. number of magnetic poles C. strength of the magnets used D. output voltage 41. An electrical device which employs a stationary armature and a rotating electromagnetic field is used aboard ship as a _.A. magnetic amplifier B. ships service alternator C. three-wire DC generator D. sa

33、turable core reactor 42. Current changing in direction and rising and falling in value is _ . A. D.C. B. A.C. C. generator D. fresh water generator 43. Equal power factors on paralleled AC generators are maintained by an automatic _.-A. voltage regulator B. reverse power relay C. reverse current rel

34、ay D. governor control switch 44. _shall be continuously powered and shall have an automatic changeover to a stand by power supply in case of loss of normal power supply . A. Cooling system - B. Alarm system C. The air conditioning installation D. The mooring equipment 45. Switchboards may be of the

35、 dead-front type in which all live parts are installed behind _and only the operation handles and instruments are on the front A. the capstan B. the collector - C. the panels D. the surface 46. The emergency generator or emergency battery is connected to _on most ships. A. distribution boards B. sec

36、tion boards -C. emergency switch boards D. main switch boards47. The primary function of an electric motor is to _. -A. develop torque B. generate high voltages C. produce a magnetic field D. generate high electrical resistance 48. Electrical leads and insulation on a motor should be painted with _.

37、A. heat-resisting acrylicB. heat-resisting aluminum-C. insulating varnishD. insulating white lead49. A circuit breaker and a fuse have a basic similarity in that they both _. A. can be reset to energize the circuit -B. should open the circuit when overloaded C. will burn out when an over current flo

38、w develops D. should short the circuit when overloaded 50. Electric circuits are protected against short circuits by means of a/an _. A. diode(二极管) B. amplifier - C. circuit breaker D. capacitor 51. The electrolyte in a lead-acid storage battery consists of distilled water and _. A. hydrogen chlorid

39、e B. calcium chloride - C. sulfuric acid D. muriatic acid 52. When under maneuvering conditions with the machinery being manually operated the control unit or console should be _.A. automatically controlled B. off power-C. continuously manned D. continuously unmanned53. _is a precaution which contri

40、butes 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 air system is shut down, the _gear put in, all drains and indicator cocks opened, and the cooling water ke

41、pt running. A. steering B. timing -C. turning D. running 55. A tank which has been sealed for a long period of time can be dangerous because _. -A. steel surfaces consume oxygen by rusting B. sealed tanks usually form a vacuum C. moisture condenses in the tank, displacing the oxygen D. most tank coa

42、tings give off poisonous vapors in the presence of moisture 56. A class C fire is burning _. A. diesel oil B. magnesium C. dunnage - D. electrical insulation 57. To prevent the spread of fire by conduction, you should _. A. close all openings to the areaB. remove combustibles from direct exposure -C

43、. cool the bulkheads around the fire D. shut off all electric power 58. The lengthening of a crack formed in the shell plating of a ship may be prevented by _.A. welding brackets across both ends of the crack B. chipping out and slot welding the entire crack -C. drilling a hole at each end of the cr

44、ack D. cutting a square notch at each end of the crack 59. After a fire has been extinguished in a closed space, personnel may safely enter the space when _.A. smoke density has been decreased sufficiently to see the bulkhead opposite the compartments entrance B. a lifeline and explosion proof flash

45、 light are used -C. all smoke and toxic fumes are removed and an adequate oxygen supply is present D. overhaul has been completed to remove any possible source of re-ignition 60. While loading bunkers, you notice oil on the water near the vessel. What should you do first? -A. Stop loading B. Notify

46、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. 61. To anneal (退火)a copper gasket, you should heat the gasket _. A. and quench it in oil B. cherry red and quench in water C. and let it cool slo

47、wly in the air D. and carbonize it 62. 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 63. The additional mark

48、 _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 64. Which of the following operations must be entered on the Oil Record Book Part I? I. Rou

49、tine discharge at sea of bilge water containing oil from the machinery spaces II. Bunkering of fuel oil A. I only B. II only C. both I and II D. neither I nor II 65. Your ships certificates show that you did not do renewing work for certificate. All certificates have expired a few days before. Thus,

50、 your ship is _.It follows therefore that she will _.A. seaworthy / be fined in our port B. un-seaworthy/ be disassembled in our port C. seaworthy / be assembled in our port D. un-seaworthy / be detained in our port 66. “Insufficiency of manning or insufficiency of certification of seafarers” is an

51、identification of a _.A. substandard ship B. standard ship C. over-standard ship D. reference ship 67. When deciding the composition of the engineering watch, which may include _appropriately, many factors shall be taken into account. A. satisfied engineers B. qualified ratings C. satisfied chief en

52、gineer D. qualified chief engineer 68. The officer in charge of the engineering watch shall notify the chief engineer without delay_.-A. in any emergency or if in any doubt as to what decision or measures to take B. in the event of any impending action in machinery spaces that may cause reduction in

53、 ships speed C. when isolating and bypassing machinery to be worked on D. co-operating with any engineer in charge of maintenance work 69. At an unsheltered anchorage the chief engineer shall consult with _whether or not to maintain an underway watch. A. the engineer officer in charge of watch B. th

54、e deck officer in charge of watch -C. the master D. the chief mate 70. The term moderate speed was previously interpreted as meaning a speed which would enable a vessel _within half the range of visibility. A. stopping B. being stopped C. to stop -D. to be stopped 71. One of the methods NOT usually allowed in