The most serious effect of air trapped in a diesel engine ja

题目
单选题
The most serious effect of air trapped in a diesel engine jacket water cooling system is that it().
A

causes colloid suspension in the cooling water

B

reduces the capability of the lubrication system

C

can form pockets which block the flow of coolant through the system

D

leads to the scuffing of cylinder walls

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相似问题和答案

第1题:

单选题
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


正确答案: C
解析: 暂无解析

第2题:

单选题
Clogged or partially obstructed exhaust ports on a diesel engine can cause()
A

over-speeding of the engine

B

failure of the engine to shut down

C

no effect of engine mounting bolts

D

high exhaust temperatures


正确答案: B
解析: 暂无解析

第3题:

_____ the engines, the diesel engine is ____ used engine on board

A.Between / more commonly

B.Among / the most commonly

C.Between / not more commonly

D.Among / not the most commonly


正确答案:B

第4题:

单选题
Diesel engine air start valve timing is controlled by()
A

engine operating speed

B

an air manifold

C

a hydraulic distributor

D

individual cams and valve gear


正确答案: C
解析: 暂无解析

第5题:

单选题
Which of the conditions listed may occur in an operating diesel engine if air pockets form within the cylinder head circulating water passages? ()
A

Hydraulic stress and distortion will develop

B

Hot spots will develop

C

Fuel oil viscosity will increased

D

An increase in trapped deposits of scale and dirt


正确答案: C
解析: 暂无解析

第6题:

单选题
Intake air flow from a diesel engine turbocharger is directly proportional to engine()
A

exhaust gas pressure

B

exhaust gas temperature

C

speed

D

load


正确答案: D
解析: 暂无解析

第7题:

单选题
A diesel engine is supercharged in order to()
A

lower the no-load RPMs

B

provide more air for combine with the fuel

C

increase the no-load RPMs

D

provide more fuel combine with the air


正确答案: D
解析: 暂无解析

第8题:

The most serious effect of air trapped in a diesel engine jacket water cooling system is that it ______.

A.Causes colloid suspension in the cooling water

B.Reduces the capability of the lubrication system

C.Can form pockets which block the flow of coolant through the system

D.Leads to the scuffing of cylinder walls


正确答案:D

第9题:

单选题
The power developed by a large slow-speed main propulsion diesel engine is dependent upon the ()
A

quantity of air it takes in and retains in the cylinders during a given time period

B

proportion of trapped air that is utilized in the combustion process

C

thermodynamic efficiency of the engine cycle

D

all of the above


正确答案: B
解析: 暂无解析

第10题:

单选题
When attempting to start a main propulsion diesel engine, the engine, the engine turns at the proper speed but will not startYou should check the()
A

starting air pressure

B

scavenge air pressure

C

over-speed trip

D

banjo oiler line


正确答案: B
解析: 暂无解析

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