轮机英语大管轮46801

中华人民共和国海事局

2008年第6期海船船员适任证书全国统考试题(总第46期)

科目：轮机英语试卷代号：801

适用对象：无限、近洋航区3000KW及以上船舶轮机长

（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82题，每题1分，第83题至94题，每题1．5分。

一、单项选择题

1. Medium speed engines have a power to weight ratio than the slow speed two strokes, but due to

the higher speeds tend to have _____ maintenance intervals.

A. higher/reduced

B. higher/increased

C. lower/reduced

D. lower/increased

2. One method of constructing large marine diesel engines and reducing the total engine frame weight

is through .

A. casting interlocking components

B. welding plates to form sections for assembly

C. forging integral components

D. case hardening integral components

3. A supercharged diesel engine, when compared to a similar naturally aspirated diesel engine, will

develop an increase in ______.

A. ignition lag

B. engine horsepower

C. lube oil system pressure

D. specific fuel consumption

4. The minimum fuel oil delivery pressure required for diesel engine injection depends primarily on

the .

A. degree of cylinder air turbulence

B. firing pressure in the engine

C. quality of fuel to be injected

D. duration of the ignition delay period

5. Increased air will raise scavenge efficiency and allow a greater mass of air to be compressed;

more fuel may now be burned giving an increased power.

A. specific volume

B. density

C. viscosity

D. calorific value

6. Which of the following methods is used to prevent throttling of compressed air through the diesel

engine air starting valves?

A. Holding the valve open for a long period

B. Increasing the starting air pressure used

C. Opening the starting air valve quickly

D. Reducing the starting air valve size

7. As engine running speed is increased from idle speed to full load speed, which of the conditions

listed will decrease?

A. Compression ratio

B. Fuel/Air ratio

C. Compression pressure

D. Lube oil pressure

8. Before being shut down, a diesel engine should idle a few minutes in order to .

A. prevent governor surging at shutdown

B. make sure the fuel nozzles are flushed clean

C. prevent pressure buildup in the fuel lines

D. prevent damage from localized overheating

9. A high temperature alarm or ___ which will melt is used to guard against the explosion of

compressor air pipelines.

A. a flame trap

B. a relief valve

C. a fusible plug

D. a bursting cap

10. On a large low-speed main propulsion diesel engine, lower main bearing wear is usually measured

by using a/an .

A. dial indicator

B. outside caliper

C. bridge gage

D. tram rod 11. Persistent knocking in one cylinder of an eight cylinder diesel engine would MOST likely be

caused by .

A. using fuel oil with low cetane number

B. a badly worn piston pin

C. a loose flywheel key

D. a loose bed plate bolt

12. A faulty injector in one cylinder of an operating diesel engine can be detected by .

A. cutting out individual injectors and noting engine performance

B. checking lube oil temperatures,

C. checking cam position

D. using a timing light

13. Excessive lubricating oil consumption in a running diesel engine can be caused by .

A. clogged lube oil piping

B. excessive valve-guide clearance

C. high lube oil viscosity

D. low lube oil temperature

14. When oil vapor, oxygen and hot spots are present at the same time within a crankcase, which of the

following hazards could develop?

A. Explosion

B. Implosion

C. Misfire

D. Dieseling

15. If some of the cylinders are not firing, the ones affected may be determined by watching .

A. the exhaust temperature

B. the exhaust pressure

C. the governor

D. the fuel flow meter

16. What is the function of the main thrust bearing?

A. Prevents lateral movement of the slow speed gear.

B. Transmits propeller thrust to the hull.

C. Keeps spring bearings in line.

D. Prevents main reduction gear axial movement.

17. of the controllable pitch propeller enables the blades to be moved to change the pitch angle.

A. An external mechanism

B. An internal mechanism

C. An interlock device

D. A hunting gear system

18. When ship navigating in rough sea, the first measure taken by the chief engineer to prevent the

overload should be .

A. cleaning fuel oil, lubricating oil and seawater filters

B. reducing fuel feeding of the main engine appropriately or reducing the pitch angle of propeller

C. using low sea chest

D. closing the skylight and the ventilation opening which doesn't affect the normal work of

equipments

19. If anything abnormal be found on the load change of main engine when the ship is entering in

shallow waterway, before taking measures the engineer on duty should .

A. stop main engine immediately

B. ask the captain and the chief engineer's permission for stopping the engine

C. inquire the bridge for the situation initiatively

D. stop engine and inform bridge

20. Pitted reduction gear teeth having a deep blue color with evidence of overheating have been

operated with .

A. excessive speed

B. improper warm-up

C. extreme misalignment

D. inadequate lubrication

21. The fuel oil supply system to an automatic auxiliary boiler, will automatically shutdown if the