海船船员考试

单选题A diesel engine is operating with excessively high exhaust temperatures at all cylindersTo correct this condition, you should FIRST （）.A reduce the engine loadB increase the cooling water flowC increase the lube oil pressureD adjust the fuel rack

题目
单选题
A diesel engine is operating with excessively high exhaust temperatures at all cylindersTo correct this condition, you should FIRST （）.
A

reduce the engine load

B

increase the cooling water flow

C

increase the lube oil pressure

D

adjust the fuel rack

参考答案和解析
正确答案： B
解析： 暂无解析
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相似问题和答案

第1题：

A smoking exhaust from an operating diesel engine could be caused by( ).

A.low sulfur content in the fuel

B.a loose injector inlet connection

C.late fuel injection

D.high injection pressure


正确答案：C
解析：sulfur/sulphur：硫;content：内容，含量
译文：运行中的柴油机冒黑烟，可能的原因是燃油喷射滞后。

第2题：

单选题
The burning of fuel oil in a diesel engine having a high sodium content, will cause （）
A

corrosion and grooving of exhaust valves

B

corrosion and gumming of the fuel injection pump

C

salt deposits in the exhaust manifold

D

slag deposits in the fuel injection equipment


正确答案： A
解析： 暂无解析

第3题：

An indication of an overloaded main propulsion diesel engine is( ).

A.white smoke in the exhaust

B.high exhaust gas pyrometer readings

C.sparks in the exhaust

D.blue smoke in the exhaust


正确答案：B
解析：pyrometer：排温表，高温计;spark:火花
译文：主推进柴油机超负荷的征兆之一是排烟温度计读数过高。

第4题：

单选题
Many diesel engine exhaust valves are being constructed with hollow stems filled with sodium in order to （）
A

provide added wear protection against today’s corrosive quality of fuel

B

increase overall valve strength due to the high gas pressures

C

assist in dissipating heat due to the extreme operating temperatures

D

reduce the overall weight of the valve thus helping eliminate valve spring surge and hammering


正确答案： C
解析： 暂无解析

第5题：

单选题
If the operating element of a thermostatic valve installed in a diesel engine cooling system malfunctions, it may result in （）
A

a low level in the engine expansion tank

B

excessively high coolant pressure

C

improper temperatures

D

malfunctioning of the jacket water heater


正确答案： B
解析： 暂无解析

第6题：

A bypass line provided around a waste heat auxiliary boiler in a diesel engine exhaust system, may be used to avoid boiler ______.

A.corrosion at low engine loads

B.erosion at high engine loads

C.overload at high engine loads

D.scaling at all exhaust temperatures


正确答案：A

第7题：

单选题
The operating diesel generators will have their exhaust temperatures, cooling water and lubricating oil temperatures and pressures （） in much the same way as for the main engine.
A

to be kept

B

logged

C

changed

D

has remained


正确答案： B
解析： 暂无解析

第8题：

High firing pressures and low exhaust temperature in a diesel engine may resultfrom( ).

A.decreased piston to cylinder head clearance

B.increased exhaust system back pressure

C.early fuel injection timing

D.low scavenge air temperature


正确答案：C
解析：decrease：减少;clearance：间隙
译文：喷油定时过早会引起柴油机爆炸压力偏高、排温偏低。

第9题：

单选题
A practical way of checking for excessive fuel injection in one cylinder of an operating diesel engine is to （）
A

feel the high pressure fuel line

B

check the cylinder exhausts for white smoke frequently

C

check the cylinder exhaust temperature

D

isolate each cylinder and inspect the injector


正确答案： A
解析： 暂无解析

第10题：

单选题
When fuel is injected late into a diesel engine cylinder,（）.
A

the exhaust will be clear

B

fuel consumption will be low

C

all the fuel will be burned at top dead center

D

fuel consumption will be high


正确答案： D
解析： 暂无解析

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