大管轮轮机英语综合(33-48期)

大管轮轮机英语综合

中华人民共和国海事局

2004年第1期海船船员适任证书全国统考试题(总第33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 exhaust valve is opened at about the same time ______the air inlet ports are opened.

A. before B. after C. when D. until

2． Cylinder wall temperature, fuel oil sulphur, and oil passage ______.

A. are interdependent B. are not interdependent C. have nothing to do with each other D. are independent

3． Acid solution ______ in the system can be tested from time to time by putting some on to a piece

of lime.

A. strength B. dense C. percentage D. velocity

4． Machinery driving fuel oil transfer and fuel oil service pumps must be fitted with a remote means

of stopping the machinery from ______.

A. within the space concerned B. outside the space concerned C. the throttle station D. within the fire room

5． Cylinder oil is a high viscosity mineral oil, with a ______machined to the anticipated sulfur

content of the fuel.

A. TAN B. TBN C. SAN D. SBN

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

will be characterized by a ______.

A. low viscosity index B. high viscosity index

C. high neutralization number D. low demulsibility quality

7． 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

8． In ______the incoming air is directed upwards, pushing the exhaust gases before it and then the

exhaust gases travel down.

A. loop scavenging B. cross scavenging C. uniflow scavenging D. supercharging 9． ______ is usually driven by the engine camshaft and supplies pilot air to the cylinder air start

valve.

A. An air receiver B. An operating valve C. An automatic valve D. An air distributor 10．Which of the following conditions can cause above normal air temperature to develop in the

intake manifold of a four-stroke/cycle, turbo-charged, diesel engine?

A. Clogged air intake filters. B. Piston blow-by.

C. A defective after-cooler. D. Faulty exhaust valves.

11．Misalignment of an engine crankshaft can be detected by measuring______of crank webs for

each unit of the engine.

A. diameters B. lengths C. deflections D. none of the above

12．A crankshaft whose center of gravity coincides with its center line is said to be ______.

A. dynamically balanced B. statically balanced C. counter balanced D. resonantly balanced 13．In a diesel engine, the main bearings are used between the ______.

A. connecting rod and the crankshaft B. wrist pin and the connecting rod C. camshaft and the engine block D. crankshaft and the engine block 14．We should not start the engine unless the turning gear is ______.

A. on B. disengaged C. bolted D. unscrewed

15．When the exhaust ports or valves are opened, the ______begin to exhaust.

A. carbon and water B. refrigeration steam C. burnt gases D. oil sludge

16．We'd better take _____to save fuel consumption, you know it would be useless to get there earlier.

A. nominal speed B. economical speed C. rated speed D. slow speed 17．Shaft sealing in a centrifugal pump can be effected by ______.

A. the mechanical seal B. packed stuffing boxes C. either A or B D. neither A nor B

18．Most pump manufacturers recommend that the suction piping dimension for centrifugal pumps be

______.

A. one size smaller than the pump suction nozzle B. the same size as the pump suction nozzle C. one size larger than the pump suction nozzle D. installed with a short radius elbow at the pump

19．The water level in a steaming auxiliary boiler will always ______.

A. rise when the steam pressure is increased

B. remain constant as long as the feed pump operates C. fall when the steam pressure is decreased D. vary as the steam demand changes

20．The concentration of total dissolved solids in the water of an auxiliary boiler can increase as a

result of ______.

A. seawater contamination B. frequent surface blows C. dissolved oxygen deaeration D. frequent bottom blows 21．Sediment collects in a tubular purifier______.

A. on top cover B. on sides of bowl C. in drain line on the discs D. on the discs 22．The operating water is supplied under the ______of an oil separator.

A. sliding bowl bottom B. bowl hood C. bowl D. filter units

23．The bilge main is arranged to drain any watertight compartment ______ballast, oil or water tanks

and to discharge the contents overboard.

A. rather than B. other than C. in addition that D. except for 24．The oil sludge is burnt in the ______onboard. I ll show you the ashes.

A. boiler B. main engine C. auxiliary engine D. incinerator

25．When making entries in the Oil Record Book, the date, operational code, and item number shall

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