海船船员考试

单选题Fuel has to be injected into the engine at a high pressure so that it （） correctly.A is purifiedB in timedC is compressedD atomizes

题目
单选题
Fuel has to be injected into the engine at a high pressure so that it （） correctly.
A

is purified

B

in timed

C

is compressed

D

atomizes

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相似问题和答案

第1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2题：

Fuel has been injected but ignition fails. The possible cause may be ______.

A.slightly leaky exhaust valve

B.increased scavenging air temperature

C.engine cylinders not scavenged sufficiently

D.too much water in the fuel oil


正确答案：D

第3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4题：

单选题
The replacement piping for diesel engine high pressure fuel systems must be the same length and diameter as the original piping to （）.
A

avoid unnecessary pints inventory

B

keep torsional vibration constant

C

use existing supports and braces

D

maintain specified injection characteristics


正确答案： A
解析： 暂无解析

第5题：

单选题
When the opening pressure of a diesel fuel injector is greater than that specified by the engine manufacturer，the （）
A

quantity of fuel injected is decreased

B

quantity of fuel injected will always be increased

C

start of injection is advanced

D

duration of injection will always be greater


正确答案： C
解析： 暂无解析

第6题：

When fuel is injected late into a diesel engine cylinder_______.

A.the exhaust will be clear

B.fuel consumption will be low

C.all the fuel will be burned at top dead center

D.fuel consumption will be high


正确答案：D

第7题：

单选题
A marine diesel engine is started by（）
A

supplying high pressure oil into a hydraulic motor

B

supplying high temperature air into the cylinder

C

supplying high pressure air into the cylinder

D

electrical igniting


正确答案： C
解析： 暂无解析

第8题：

If fuel injection to a four-stroke/cycle diesel engine begins earlier than designed, ignition may be delayed because the

A.cylinder compression pressure may not be high enough

B.cylinder compression temperature may be too high

C.fuel oil injection pressure may not be high enough

D.scavenge and purge process is incomplete


正确答案：A

第9题：

单选题
Generally speaking，the fuel injected into a marine diesel engine combustion chamber is ignited by（）.
A

spark plugs

B

glow plugs

C

heat of compression

D

a magneto


正确答案： A
解析： 暂无解析

第10题：

单选题
If a fire ignites in the engine room as a result of a high pressure fuel oil leak, you should FIRST （）.
A

secure the ventilation

B

find a soda acid extinguisher

C

shut off the fuel oil supply

D

secure the generator


正确答案： C
解析： 暂无解析

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