海事局轮机机考必考题

1It is during _____ that work energy is being put into the engine; during the other 3 strokes of the piston, the engine has to do the work.

A. the suction stroke

B. the compression stroke

C. the expansion stroke

D. the exhaust stroke

2The ______Convention is the first to establish basic requirements on training certification and watch-keeping for seafarers on an international level.

A. STCW78

B. STCW95

C. SOLAS74

D. SOLAS88

3The Port State Control officer may witness a fire drill carried out by the crew assigned to these duties on the _________.

A. Navigation Log Book

B. Engine Room Log Book

C. Oil Record Book

D. Muster List

4The additional mark _______ in the Classification Certificate for Machinery means propulsion apparatus is remotely controlled on the navigating bridge control station, and engine assembly control station is unmanned periodically.

A. BRC

B. MCC

C. AUT-0

D. AUT-1

5The flash point of a residual fuel oil should be used to determine the highest temperature to which oil may be heated.

A. for atomizing

B. for centrifuging

C. in a storage tank

D. in the re-circulating line

6Using a file without a handle may result in ________.

A. your work becoming rounded

B. injury to your hand

C. overheating of the file

D. pinning

7 “Insufficiency of manning or insufficiency of certification of seafarers” is an identification of a _______.

A. substandard ship

B. standard ship

C. over-standard ship

D. reference ship

8Thermostatic steam pressure reducing valves are used in the fuel oil service system to control the _______.

A. double bottom fuel oil tank temperature

B. heater supply steam flow

C. pressure of the fuel supplied to the burners

D. at temperator steam flow in the heater discharge circuit

9Which of the listed governor characteristics will greatly affect the load sharing relationship between paralleled diesel generators?

A. Sensitivity

B. Power

C. Speed droop

D. Compensation

10To shut down a diesel engine after it exceeds the set maximum speed，which type of device listed should be used?

A. Speed limiting governor

B. Over-speed governor

C. Over-speed trip

D. Over-speed relay

11 By comparing the exhaust gas temperature of each cylinder, the operator can determine if the load is balanced throughout the engine. The device most commonly used is a________.

A. tachometer

B. pyrometer

C. dynamometer

D. calorimeter

12 Which of the diesel engine components listed increase air density and helps to improve engine operating efficiency?

A. Impeller

B. Compressor

C. After-cooler

D. Exhaust differ

13The condensers located in various stages of a flash evaporator are cooled by___.

A. distillate

B. seawater

C. brine

D. air

14The cetane rating of diesel fuel is an indication of the ________.

A. ignition quality of the fuel

B. calorific value of the fuel

C. flash point of the fuel

D. rate of fuel consumption

15Diesel engine air start system check valves are opened by ________.

A. an air start cam

B. cylinder compression pressure

C. starting air pressure

D. valve springs

16Cold weather starting of a diesel engine may be made easier by .

A. decreasing the compression ratio

B. using a special fuel having a high ignition temperature

C. increasing the starting air supply

D. heating the jacket water

17Flame failure in an automatically fired auxiliary boiler can from a/an _________.

A. incorrect electrode setting

B. incorrect nozzle position

C. clogged fuel nozzle

D. broken high tension lead

18Refrigerant entering the compressor of a refrigeration system should be in which of the following conditions?

A. Sub-cooled liquid

B. Sub-cooled vapor

C. Superheated vapor

D. Liquid

19A purge recovery system is used in a centrifugal air conditioning or refrigeration system to

_____.

A. purge lube oil from the liquid refrigerant

B. recovers water purged from the system

C. separate foul gases from the receiver

D. purge non-condensable gases without losing refrigerant

20For a given exhaust gas boiler, what is the quantity of its evaporation mainly determined? A. the temperature and flow quantity of the exhaust gas from M.E