海船船员考试

单选题The exhaust system for a turbocharged two-stroke/cycle diesel engine functions to（）A discharge exhaust gases and smokeB furnish energy to the turbochargerC reduce engine room noiseD all of the above

题目
单选题
The exhaust system for a turbocharged two-stroke/cycle diesel engine functions to（）
A

discharge exhaust gases and smoke

B

furnish energy to the turbocharger

C

reduce engine room noise

D

all of the above

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相似问题和答案

第1题：

单选题
Exhaust gases are generally removed from the cylinders of a two-stroke/cycle diesel engine by（）
A

natural aspiration

B

masked intake valves

C

air cells

D

scavenging air


正确答案： B
解析： 暂无解析

第2题：

单选题
The exhaust system for a turbocharged diesel engine functions to （）
A

power the after-coolers

B

power the turbocharger

C

reduce the cylinder scavenge effect

D

cool the turbocharger


正确答案： C
解析： 暂无解析

第3题：

Exhaust gases are generally removed from the cylinders of a two-stroke/cycle diesel engine by

A.natural aspiration

B.masked intake valves

C.air ceils

D.scavenging air


正确答案：D

第4题：

单选题
In a closed cooling system for a turbocharged, four-stroke/cycle diesel engine, fluctuating water pressure can be caused by （）
A

improper venting of the cooling system

B

carrying the expansion tank water level too high

C

a totally clogged impeller in the cooling water pump

D

an incorrectly set cooling system temperature control


正确答案： C
解析： 暂无解析

第5题：

单选题
The size of the exhaust valve opening is （）
A

most critical in a four-stroke cycle diesel engine

B

most critical in a two-stroke/cycle diesel engine

C

most critical in a four-stroke/cycle diesel engine if it is turbocharged

D

of equal importance in a two-stroke/cycle diesel engine as in a four-stroke/cycle diesel engine


正确答案： A
解析： 暂无解析

第6题：

单选题
The camshaft drive is designed to maintain proper camshaft speed relative to crankshaft speedIn maintaining this relationship, the camshaft drive causes the camshaft to rotate at（）
A

one half crankshaft speed in a two-stroke cycle diesel engine

B

crankshaft speed in a two-stroke cycle diesel engine

C

two times crankshaft speed in a two-stroke cycle diesel engine

D

one-fourth times crankshaft speed in a four-stroke cycle diesel engine


正确答案： A
解析： 暂无解析

第7题：

单选题
The exhaust gases in a supercharged two-stroke/cycle diesel engine are expelled from the cylinder by （）
A

pumping action of the piston

B

pressure of the fuel charge

C

vacuum developed in the manifold

D

pressure of the fresh air charge


正确答案： D
解析： 暂无解析

第8题：

During the valve overlap period, the exhaust pressure of a turbocharged four-stroke/cycle diesel engine must be less than the intake manifold pressure to ensure ______.

A.effective cylinder scavenging and cooling

B.constant pressure from the turbochargers

C.cooler operation of the exhaust system

D.effective constant pressure for turbocharger operation


正确答案：A

第9题：

单选题
What color exhaust will be exhibited when a slow speed two-stroke/cycle main propulsion diesel engine, designed to operate on light and heavy fuel oil, is operated on insufficiently preheated heavy fuel oil?（）
A

White

B

Black

C

Blue

D

Clear


正确答案： B
解析： 暂无解析

第10题：

单选题
When would the available energy of the exhaust gases of a two-stroke/cycle diesel engine be insufficient to drive an exhaust gas turbocharger, resulting in the incorrect amount of air for combustion?（）
A

During operation at low speed

B

During operation at rated speed, but low power output

C

During acceleration

D

All of the above


正确答案： B
解析： 暂无解析

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