海船船员考试

单选题One engine manufacturer recommends heavy fuel oil should not be heated above 80℃ to 95℃ (176 ℉ TO 203℉) before purificationThis upper limit should be observed to ensure against（）A flattening of the bowl neoprene O-ringsB operation within the explosive

题目
单选题
One engine manufacturer recommends heavy fuel oil should not be heated above 80℃ to 95℃ (176 ℉ TO 203℉) before purificationThis upper limit should be observed to ensure against（）
A

flattening of the bowl neoprene O-rings

B

operation within the explosive rang of the fuel

C

excessive purifier operating pressures

D

excessive oil viscosity

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相似问题和答案

第1题：

If you suspect a diesel engine is misfiring due to air leakage into the fuel system, you should begin looking for the leak at the

A.fuel line connections to the cylinder injection valves

B.gasket surfaces of the fuel oil filters

C.discharge fittings of the fuel injector pumps

D.suction side of the fuel oil transfer pump


正确答案：D

第2题：

单选题
When the ship is going to enter into the harbor,（）
A

change from heavy fuel oil to diesel oil for mail engine

B

pumping oil bilge water

C

change sea chest form high level one to lower one

D

test emergency generator


正确答案： B
解析： 暂无解析

第3题：

Main engines as well as auxiliary engines operating on heavy fuel should have continuousoon the lubricating oil, either according tothebypass or batch principles

A.filtering

B.centrifuging

C.depositing

D.operating


答案：B

第4题：

单选题
If a tow-stroke/diesel engine is over-speeding due to leakage of lube oil into the cylinders, what should you do to stop the engine?（）
A

Move the fuel control mechanism to the no fuel position

B

Block the fuel supply by closing the master fuel valve

C

Shut off the fuel supply and block the flow of intake air

D

Relieve all pressure in the fuel system


正确答案： B
解析： 暂无解析

第5题：

单选题
A viscosity regulator used for an engine is usually provided in order to （） for an engine burning heavy fuel oil.
A

regulate the fuel supply

B

maintain a constant fuel viscosity at the fuel valves

C

maintain efficient cooling

D

alter the fuel density


正确答案： B
解析： 暂无解析

第6题：

The oil index of main engine should be controlled to prevent it from ____ in heavy weather.

A.over heat

B.over speed

C.over pressure

D.over worn


正确答案：B

第7题：

单选题
Before starting a diesel engine, you should always（）
A

check the pyrometer readings

B

check the crankcase oil level

C

check the fuel oil strainers

D

clean the fuel system


正确答案： B
解析： 暂无解析

第8题：

Have you ever served the auxiliary engine to combustion heavy oil? What should be borne in mind when transferring oil; from heavy oil to light oil?


正确答案：I have ever served the auxiliary engine to combustion a combination of A and C oil. When transferring oil from heavy oil to light oil, the changing of temperature should not be rapid. 1℃ to 2℃ per minute is the best. Meanwhile the viscosity changing is invariably observed. The oil temperature to be heated varies in quality of fuel oil. In general, 180 CST needs to be heated to 95-105℃; 380 CST needs to be heated to 130-135℃. The viscosity is under the control of approximately 2 Englers.

第9题：

单选题
If a fire ignites in the engine room as a result of a high pressure fuel oil leak, you should FIRST （）.
A

secure the ventilation

B

find a soda acid extinguisher

C

shut off the fuel oil supply

D

secure the generator


正确答案： C
解析： 暂无解析

第10题：

单选题
When fuel oil has seriously contaminated a diesel engine lubricating oil, you should （）.
A

filter to remove the fuel oil

B

use the settler to remove the fuel oil

C

remove the fuel oil by centrifuging

D

drain and then renew the lube oil supply


正确答案： A
解析： 暂无解析

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