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If sludge accumulates on the underside of a diesel engine pi

题目
单选题
If sludge accumulates on the underside of a diesel engine piston, it will（）
A

cause blow-by

B

chemically attack the piston skirt

C

form an emulsion of lube oil and water

D

raise the piston temperature

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相似问题和答案

第1题：

单选题
Diesel oil may be used to cool （） of a diesel engine.
A

cylinders

B

exhaust valves

C

pistons

D

fuel valves


正确答案： D
解析： 暂无解析

第2题：

单选题
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


正确答案： D
解析： 暂无解析

第3题：

Which lubricating oil additive is used in diesel engines to reduce the tendency(倾向)for sludge and varnish to form on the engine parts?

A.Flash point improvers

B.Pour point improvers

C.Inhibitors

D.Foam suppressors(抑制物)


正确答案：C

第4题：

单选题
Starting a large low-speed propulsion diesel engine on diesel fuel during cold weather conditions, will be made easier by （）
A

increasing the quantity of starting air

B

increasing the lube oil pressure

C

heating the engine fuel supply

D

heating the engine coolant


正确答案： A
解析： 暂无解析

第5题：

单选题
Cracking of a diesel piston crown can result from（）
A

Excessive piston to liner clearance

B

The underside of the piston crown being excessively dirty lowering the rate of heat transfer

C

Faulty nozzle spray

D

All of the above


正确答案： D
解析： 暂无解析

第6题：

单选题
As a heat engine,（） energy is the source of power by which the diesel engine can be operated.
A

electric

B

heat

C

mechanical

D

exhaust


正确答案： D
解析： 暂无解析

第7题：

单选题
No sooner （） than they started to repair the sludge pump.
A

the second engineer had got into the engine room

B

the second engineer got into the engine room

C

has the second engineer got into the engine room

D

did the second engineer get into the engine room


正确答案： C
解析： 暂无解析

第8题：

单选题
The marine diesel engine is a type of diesel engine used on ships The （） of its operation is not very difficult to understand.
A

principle

B

principal

C

cause

D

case


正确答案： D
解析： 暂无解析

第9题：

单选题
Which of the following conditions is most likely to occur when unburned fuel contaminates the crankcase of a diesel engine?（）
A

Lube oil is diluted and its viscosity is reduced

B

Sulfuric acid is formed

C

Bearings become pitted ad immediately fail

D

Valve stems develop sludge deposits


正确答案： A
解析： 暂无解析

第10题：

单选题
Mist detectors used on large low-speed main propulsion diesel engines monitor and check for the presence of （）.
A

fuel oil vapor at the sludge tank vent

B

unburned fuel vapors in the scavenge air receiver

C

lube oil vapors in the crank case

D

lube oil vapors in the engine room


正确答案： C
解析： 暂无解析

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