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1、中华人民共和国海事局2005年第1期海船船员适任证书全国统考试题(总第36期) 科目：轮机英语 试卷代号：806适用对象：近洋航区750-3000KW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 supercharge pressure is, _power an engine develops. A. The higher/the more B.
2、 Higher/more C. Higher/little D. The higher/the less 2. The opening or closing of the cylinder starting valve is controlled by _. A. the starting air distributor B. the cut-off valve on the air main C. the main starting valve D. the air bottle control valve 3. Which of the following can be obtained
3、by means of an indicator card? A. the peak pressure in a cylinder. B. the temperature of the cooling water. C. the fuel consumption. D. none of the above. 4. _ rods are not in proper condition so that too much fuel is supplied to the corresponding cylinder. A. Piston B. Sounding C. Regulating D. Con
4、necting 5. An excessive amount of water is prevented from entering a vessel using a water lubricated stern tube bearing by the use of the _. A. propeller hub B. lignum vitae C. shaft packing D. labyrinth seal 6. About half an hour before the engine is required, cooling water at _must be circulated i
5、n principle. A. more than the working temperature B. less than the working temperature C. the working temperature D. the same as the surrounding temperature 7. The lubricating oil is pumped from the drain tank, very often with _in the suction line. A. a filter B. a strainer C. a magnetic filter D. a
6、 fine strainer 8. 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 9. When a vessel is in dry-dock, the vessels engineers should _. A. examine the condition of the prop
7、eller B. chip and paint all hull protection zincs C. install new docking plugs in all cofferdams D. inspect the hull for hogging or sagging 10. If the engine does start on air, but combustion does not immediately begin, the cause may be_. A. failure of the fuel pumps B. starting air pressure too low
8、 C. stop valve in air line closed D. the turning gear still engaged 11. Some vessels are equipped with a water lubricated stern tube. When at sea, operating under normal conditions, the water service valve from the ships saltwater system to the bearing should be _. A. closed, and no leakage permitte
9、d across the shaft packing B. closed, and only slight leakage permitted across the shaft packing C. opened, and no leakage permitted across the shaft packing D. opened, and only slight leakage permitted across the shaft packing 12. While standing by the engine, You should _. A. drain oil service tan
10、k B. check lube oil level C. start fuel oil pump D. All of the above 13. The difference between a supercharged engine and an un-supercharged engine is that _ operates at an increased pressure. A. the later B. the latter C. the former D. the farmer 14. Within the cycle of a forced circulation auxilia
11、ry water-tube boiler, part of the water flashes into steam, and the remaining hot water is _.A. collected in the lower portion of the steam accumulator for re-circulation back to the heating coil or water tank B. returned to the lower drum via down-comers due to density difference for reheatingC. pa
12、sses through the domestic heating system return line steam traps to the auxiliary feed supply tankD. automatically dumped into auxiliary feed heater and reheated by auxiliary exhaust back pressure15. Grind the _. A. keyway B. shaft C. packing D. valve 16. Which of the following pumps is used where a
13、 relatively high pressure and small capacity are required? A. volute pump B. diffuser pump C. reciprocating pump D. all of the above 17. A centrifugal pump vibrates excessively during operation. Upon disassembling the pump it is found that the impeller is out of balance. Without an available spare,
14、you should _. A. drill holes through the heavy side of the impeller until it balances B. weld counterweights to the light side of the impeller C. remove metal from the heavy side by machining in a lathe D. acid wash and scrape the heavy side until it balances 18. Lube oil pumps taking suction from the sump of most small marine engines are usually _. A. of the diaphragm type B. of the centrifugal type C. of the positive displacement type D. independently driven by electric motors 19. If air at 95 dry bulb temperature and 50% relative humidity is conditioned to 75 dry bulb t
