海船船员考试

单选题Failure to open the diesel engine test cocks after a long period of shutdown, prior to starting may result in （）A an air bound fuel systemB damage to cylinder heads and pistonsC excessive fuel injectionD excessive air valve lift

题目
单选题
Failure to open the diesel engine test cocks after a long period of shutdown, prior to starting may result in （）
A

an air bound fuel system

B

damage to cylinder heads and pistons

C

excessive fuel injection

D

excessive air valve lift

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相似问题和答案

第1题：

Before engaging the turning gear and turning the diesel engine, which of the following operation should be done except______.

A.open the indicator cocks

B.supply some CYL.Oil to cylinder liner wall with lubricator (only for two stoke diesel engine)

C.put the fuel handle in the "stop" position

D.pump up the air bottle


正确答案：D

第2题：

单选题
Leaking oil seals on a diesel engine turbocharger can cause（）
A

the engine to run after the fuel has been secured

B

the engine to over-speed

C

a fire

D

all of the above


正确答案： D
解析： 暂无解析

第3题：

200 Start the turning gear， and with some one hand-operating the cylinder lubricators at regular intervals, and with the indicator cocks@,

and with the control gear in theoposition, give the engine at least one complete turn

A.open; stop

B.closed, stop

C.open; start

D.closed: start


答案：A

第4题：

单选题
Diesel engine cylinder head test cocks are used to（）
A

check cylinder lubrication prior to starting engine

B

connect exhaust gas analyzers to determine engine efficiency

C

pressure test cylinder heads to check for leaks

D

remove moisture accumulations from cylinder prior to starting


正确答案： D
解析： 暂无解析

第5题：

单选题
Diesel engine mufflers or silencers reduce the engine exhaust noise by （）
A

passing the exhaust through long head pipes

B

diffusing exhaust vibrations through activated carbon baffles

C

increasing the exhaust gas velocity

D

reducing the exhaust gas velocity


正确答案： D
解析： 暂无解析

第6题：

单选题
In a four-stroke cycle diesel engine the intake valves open （）
A

before TDC and close after BDC

B

after TDC and close after BDC

C

before TDC and close before BDC

D

after TDC and close before BDC


正确答案： A
解析： 暂无解析

第7题：

单选题
In a diesel engine, exhaust valves open before the intake ports are uncovered to （） Ⅰ.reduce pumping losses Ⅱ.reduce back pressure
A

Ⅰonly

B

Ⅱonly

C

bothⅠand Ⅱ

D

neitherⅠnor Ⅱ


正确答案： B
解析： 暂无解析

第8题：

A sudden power loss from a turbocharged and after-cooled diesel engine is an indication of a/an

A.turbocharger malfunction or failure

B.crankcase exhauster overload

C.overload on the intercooler

D.obstruction in the engine cylinders


正确答案：A

第9题：

单选题
If a crankcase explosion has occurred in a diesel engine, and the crankcase remains intact, which of following precautions should be observed?（）
A

The cylinder indicator cocks should be opened

B

The sump lube oil scavenge pump should be secured immediately

C

The explosion relief valves should be manually opened

D

The crankcase should remain unopened until the engine has cooled


正确答案： B
解析： 暂无解析

第10题：

单选题
Which of the following methods is used to prevent throttling of compressed air through the diesel engine air starting valves?（）
A

Holding the valve open for a long period

B

Increasing the starting air pressure used

C

Opening the stating air valve quickly

D

Reducing the starting air valve size


正确答案： D
解析： 暂无解析

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