海船船员考试

单选题Either a low injection pressure or a leakage of piston rings is able to lead （）.A a high exhaust temperatureB a high smoky exhaustC a high outputD a high compression

题目
单选题
Either a low injection pressure or a leakage of piston rings is able to lead （）.
A

a high exhaust temperature

B

a high smoky exhaust

C

a high output

D

a high compression

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相似问题和答案

第1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2题：

Low compression in a diesel engine could be caused by

A.worn or broken cylinder liner sealing rings

B.high cooling water temperature

C.worn or broken piston rings

D.low fuel oil pressure


正确答案：C

第3题：

Which of the following statements represents the function of the compression rings installed at the top of a diesel Engine piston?

A.Control the amount of lube oil burned in the combustion chamber

B.Transmit heat from the piston to the cylinder liner

C.Prevent damage to ring groove inserts by acting as a heat dam

D.Dissipate combustion chamber gas pressure by channeling it through the ring gap


正确答案：B

第4题：

单选题
Late fuel injection timing is indicated by （）
A

lower than normal cylinder pressure and low exhaust temperature

B

lower than normal cylinder pressure and high exhaust temperature

C

higher than normal cylinder pressure and low exhaust temperature

D

higher than normal cylinder pressure and high exhaust temperature


正确答案： B
解析： 暂无解析

第5题：

单选题
Worn main bearings in a diesel engine can result in （）
A

decreased compression pressure

B

increased lube oil pressure

C

lower lube oil temperature

D

excessive leakage past the piston rings


正确答案： D
解析： 暂无解析

第6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7题：

单选题
Around the combustion chamber, all the main components are to give low thermal strains and the smallest, circumferentially symmetric deformations for good sealing between piston rings and liner（）
A

drill cooled

B

hole cooled

C

tube cooled

D

bore cooled


正确答案： A
解析： 暂无解析

第8题：

A diesel engine experiences a sudden loss in speed, accompanied by black exhaust smoke, with the fuel rack at maximum, and speed remaining below normal .the probable ___.

A.engine overload

B.leaky valves

C.stuck or broken piston rings

D.low air injection pressure


正确答案：A

第9题：

单选题
A diesel engine experiences a sudden loss in speed, accompanied by black exhaust smoke, with the fuel rack at maximum, and speed remaining below normal the probable（）
A

engine overload

B

leaky valves

C

stuck or broken piston rings

D

low air injection pressure


正确答案： A
解析： 暂无解析

第10题：

单选题
Early injection timing is indicated by （）.
A

high exhaust temperature and low firing pressure

B

high exhaust temperature and high firing pressure

C

low exhaust temperature and low firing pressure

D

low exhaust temperature and high firing pressure


正确答案： C
解析： 暂无解析

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