轮机英语历年真题40期

中华人民共和国海事局

2006年第2期海船船员适任证书全国统考试题(总第40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.______usually helps to induce air movement to assist combustion.

A. Cylinder cover

B. Main bearing

C. The exhaust valve

D. The piston movement

2.The mechanical efficiency of an engine is always less than 100% ______losses occurring in the

form of friction.

A. because

B. since

C. due to

D. owing

3.The exhaust ports are located around the lower part of the cylinder liner, ______the products of

combustion are driven by scavenging air.

A. in which

B. by which

C. through which

D. from which

4.The third engineer took the ______and checked the tank table in the office and recorded all relevant

data, as well as calculated the bunkering.

A. water level

B. sump level

C. ballast tank level

D. ship's trim

5.The lubricating pipes and ducts should be blown out with ______.

A. the atmosphere

B. the fresh water

C. the compressed air

D. the chemical compounds

6.______neutralizes the acid conditions and ______cleanses the rings and grooves.

A. The detergency/the alkalinity

B. The alkalinity/the detergency

C. The inhabitant/ the water

D. The additives/the distilled water

7.If the engine does not start on air, it may be due to______.

A. low compression of the fuel pumps

B. incorrect timing of fuel pumps

C. the starting air valves stuck

D. air-locks in fuel oil pipeline

8.______device is provided to prevent starting air from being admitted to the cylinder before the

reversing is completed.

A. An automatic

B. A transmission

C. A self-regulating

D. An interlocking

9. A reduction 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

10.Fuel injection uses the jet pump system and a Woodward type hydraulic ______is used to control

engine speed.

A. controller

B. governor

C. instrument

D. apparatus 11.The overspeeding of the diesel engine driving an electric generator could cause ______.

A. low voltage trip to trip

B. reverse power trip to trip

C. damage to windings

D. excessive exhaust temperatures

12.Any carbon built up on surfaces must be washed away by ______additives and held in suspension

by a ______additive.

A. dispersant /detergent

B. detergent/dispersant

C. dispersant /dispersant

D. detergent/detergent

13.While flowing through the volute in a centrifugal pump, part of the ______energy of the liquid is

converted to ______energy.

A. kinetic/pressure

B. kinetic/essential

C. pressure/kinetic

D. pressure/height

14.Gear pumps are ______because they discharge a near constant amount of liquid regardless of

pressure.

A. negative displacement type

B. turbine type

C. positive displacement type

D. mixed-flow type

15.Operating a rotary pump at speeds in excess of design requirements could cause______.

A. decreased clearances between rotating parts

B. decreased slippage to the suction side of the pump

C. air binding in the discharge ports

D. erosion and excessive wear

16.The fire pumps must be capable of delivering a total quantity of water at a defined head , not less

than______of the total bilge pumping capacity.

A. one-third

B. two-thirds

C. one-fourth

D. two-fourths

17.The bilge system has been performing well; however, the aft starboard engine room bilge-well

suddenly fails to be pumped out. Which of the following should be done first to determine the cause?

A. Open the bilge pump for inspection.

B. Remove each of the manifold valves.

C. Remove only the manifold valve to the affected bilge-well.

D. Attempt to pump out another bilge well to determine if the entire system is affected.

18.Which of the following statements describes one of the functions of the ballast system?

A. To permit flooding of any fuel oil storage tank on any class of ship.

B. To use it as a secondary service system.

C. To store reserve feed or potable water for extended cruises.

D. To stabilize the ship by flooding certain designed tanks with seawater.

19.If an operating auxiliary boiler has a water pH reading of 7, you should ______.

A. bottom blow the boiler

B. treat the water with caustic soda

C. treat the water with chemical scavengers

D. reduce the water alkalinity to recommended readings

20.Where tanks are arranged for either oil or ballast ______must be fitted in the pipeline.

A. a change-over chest

B. a head tank

C. a emergency bilge pump

D. an air cooler

21.The most common cause of scale formation in an auxiliary boiler is ______.

A. concentrations of calcium sulphate in the boiler water