轮机英语39期805试题

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：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.The rotating range of the low speed diesel engine is usually lower than ______.

A. 100 rpm

B. 200 rpm

C. 300 rpm

D. 500 rpm

2.Which of the following conditions may need to be reduced when operating a large, low-speed,

main propulsion, diesel engine at low loads?

A. Injection pressures.

B. Control air supply pressure.

C. Cooling water flow through after-coolers.

D. Lube oil temperature.

3.Suppose the rated capacity of the main engine of a ship is 10,000 KW. at 100 rated rpm, then

when at 80 rpm its capacity should be ______.

A. 800 KW

B. 5120 KW

C. 6400 KW

D. 4180 KW

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.Excessive clearances in the main or crank-pin bearings will sometimes be indicated by ______

before any bearing knock is heard.

A. loss of flow in the fuel system

B. loss of pressure in the air system

C. loss of flow in the lubricating system

D. loss of pressure in the lubricating system

6.Which of the following statements is correct regarding an oil with a high viscosity index?

A. A large change of viscosity occurs with a minor change in temperature.

B. No change in viscosity occurs with any change in temperature.

C. Very little change in viscosity occurs with a significant（显著的） change in temperature.

D. The viscosity of the oil increases with an increase in temperature.

7.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

8.______, remedies must be taken to stop it as early as possible.

A. Any surge occurs

B. Any surge occurred

C. Should any surge occur

D. Should any surge occurring 9.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.

10.The power generated in the turbine must ______that required by the compressor.

A. be less than

B. be larger than

C. be as large as

D. not be so large as

11.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

12.The most important factor in engine performance is the actual power output at the end of the

crankshaft available for doing work. This is known as ______.

A. indicated horsepower

B.brake horsepower

C. net horsepower

D. friction horsepower

13.Grind the ______.

A. keyway

B. shaft

C. packing

D. valve

14.In a ______the center screw is driven and the outer screws idle.

A. single screw pump

B. double-screw pump

C. triple screw pump

D. centripetal pump

15.Which of the following pumps belongs to centrifugal pump?

A. reciprocating pump

B. screw pump

C. diffuser pump

D. water-ring pump

16.During compressor’s running the accumulated moisture in the separators must be______.

A. drained off

B. collected

C. sent to the crankcases

D. separated with oil

17.The emergency bilge suction valve is typically used ______.

A. to inject cleaning additives when the bilges are extremely dirty

B. when the main condenser becomes fouled, in order to provide additional cooling water

circulation

C. to connect the rose box to the independent bilge suction

D. if the bilges become flooded and they can not be emptied by any other means

18.The valve best suited for throttling gas or liquid flow in a pipeline is the ______.

A. gate valve

B. globe valve

C. check valve

D. plug cock

19.The clutch band of a constant tensioning mooring winch must be set up tight enough to drive the

winch drum and should slip only when ______.

A. excessive loads are placed on the winch

B. minimum pull is being exerted by the winch

C. automatic operation of the winch is desired

D. wire is being retrieved at the maximum rate

20.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

21.For proper operation, auxiliary boiler feed water must have which of the following characteristics?

A. High oxygen concentration.

B. Low pH.

C. Proper alkalinity.

D. All of the above.

22.The ______has a water damp ring.

A. purifier

B. oil/water separator

C. incinerator

D. distiller

23.The operating water is supplied under the ______of an oil separator.

A. sliding bowl bottom

B. bowl hood

C. bowl

D. filter units