39803轮机英语

中华人民共和国海事局

2006年第1期海船船员适任证书全国统考试题(总第39期)

科目：轮机英语试卷代号：803

适用对象：无限、近洋航区3000KW及以上船舶大管轮

（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68题，每题1分，第69题至76题，每题1.5分,第77题至78题,

每题10分。

一、单项选择题：

1.The thermal energy produced by an internal combustion engine is transformed into ______.

A. combustion energy

B. internal energy

C. external energy

D. mechanical energy

2.______became oval , it should be machined .

A. The upper half of cross-head bearing

B. The cross-head pin

C. The cross-head bearing

D. The cross-head guide plate

3.When considering the lowest fuel system operating temperature, ______are important.

A. specific gravity or relative density

B. open flash point and closed flash point values

C. higher calorific and lower calorific values

D. cloud point and pour point values

4.When the fuel oil is burning in the combustion chamber, it ______.

A. gives up large amount of heat

B. gives off large amount of heat

C. gives up large amount of steam

D. gives off large amount of steam

5.Now that the valve is not worth ______. I suggest it ______.

A. to repair/renewing

B. repairing/renewing

C. to repair/ be renewed

D. repairing/be renewed

6.The tendency for lubricating oil to thin out at high temperature and thicken at low temperature

will be characterized by a ______.

A. low viscosity index

B. high viscosity index

C. high neutralization number

D. low demulsibility((抗乳化性) quality

7.The centrifuge, settling tanks and ______are used to clean fuel oil.

A. balance tank

B. storage tank

C. service tank

D. filters

8.Which of the following actions should be taken if during a routine maintenance inspection of a

centrifugal pump, localized scoring on a pump shaft sleeve is detected?

A. Correct the cause of the scoring and repair the sleeve or replace with a new one.

B. Reassemble the unit and provide more water leak off for proper lubrication.

C. Check for parallel alignment of the sleeve radial faces to the sleeve bores.

D. Reassemble the unit and adjust the governor to obtain a slower speed. 9. A hot air start pipe indicates that there is ______.

A. inefficient cooling

B. a leaking air start valve

C. a clogged drain valve

D. a leaking air bottle

10. A restricted air intake to a diesel engine may result in the engine ______.

A. failing to reach rated speed

B. knocking under maximum load

C. hunting or surging under light load

D. overspeeding and running away

11.The turbo-blower comprises a gas turbine and a ______.

A. condenser

B. blower

C. soot blower

D. air receiver

12.Some vessels are equipped with a water lubricated stern tube. When at sea, operating under

normal conditions, the water service valve from the ship's saltwater system to the bearing should be ______.

A. closed, and no leakage permitted 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

13.Although lube oils used in the main lubricating service systems should have a relatively high

flash point to avoid ignition, they can create smoke and fire hazards when they ______.

A. are exposed to a vacuum

e in contact with extremely hot surfaces

C. are reduced in temperature to just above the pour point

D. become extremely agitated（激动的） or aerated (充气、通风)

14.An increase in load on a diesel engine results in ______of speed of the crankshaft.

A. a reduction

B. an increase

C. an outing

D. a downwards

15.We can control the speed of the engine by ______the quantity of oil supplied.

A. exchanging

B. regulating

C. adjusting

D. differing from

16.Wear in parts of exhaust valve operation gear will tend to ______the tappet clearance.

A. increase

B. reduce

C. rise

D. reduction.

17.The most suitable pump for oily water separator feed duties is______.

A. a reciprocating pump

B. a vane pump

C. a centrifugal pump

D. a triple screw pump

18. 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, you should ______.

A. drill holes through the heavy side of the impeller until it balances

B. weld counterweights（平衡物） 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

19.Improper maintenance of an automatic auxiliary boiler oil burner could result in ______.

A. fuel pump failure

B. fan motor failure

C. increased feed-water consumption

D. decreased boiler efficiency

20.In readying an auxiliary water-tube boiler for a routine hydrostatic test, which of the following

procedures should be undertaken prior to filling the boiler with fresh water?