《轮机英语历年真题41期》由会员分享，可在线阅读，更多相关《轮机英语历年真题41期（5页珍藏版）》请在金锄头文库上搜索。
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 component
3、s 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 p
4、ower 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. Accordin
5、g 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 usuall
6、y 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
7、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. sea
8、water 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 f
9、rom 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
10、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 on
11、ce 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
12、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.
13、 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 we
14、ar 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 compl
15、etely 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 ce
