海船船员考试

单选题Which of the fuel injection systems listed uses a spring loaded differential spray needle valve and individual pump for each cylinder?（）A Common-rail injectionB Air injectionC Jerk pump injectionD Distribution injection

题目
单选题
Which of the fuel injection systems listed uses a spring loaded differential spray needle valve and individual pump for each cylinder?（）
A

Common-rail injection

B

Air injection

C

Jerk pump injection

D

Distribution injection

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相似问题和答案

第1题：

Which of the following problems is the main source of fuel pump and injection system malfunctions?

A.Improper lubrication

B.Air in the fuel system

C.Coated fuel lines

D.Excessive vibration


正确答案：B

第2题：

单选题
Movement of the pump control rack in a fuel injection system using individual plunger-type pumps （）
A

changes the position of the fuel inlet ports

B

changes the length of the pump stroke

C

varies the quantity of fuel delivered

D

varies the compression of the delivery valve spring


正确答案： D
解析： 暂无解析

第3题：

Because the timing of injection is crucial, _____ mounted on the camshaft, which is driven by the crankshaft are used to operate the fuel pumps, one of which is provided for each cylinder.

A.gears

B.rams

C.barrels

D.cams


正确答案：D

第4题：

单选题
Which of the following problems is the main source of fuel pump and injection system malfunctions?（）
A

Improper lubrication

B

Air in the fuel system

C

Coated fuel lines

D

Excessive vibration


正确答案： B
解析： 暂无解析

第5题：

单选题
If you increase the clearance between a valve stem and rocker arm, which of the listed condition will occur?（）
A

valve will open later

B

valves will close later

C

amount of fuel injected will be increased

D

amount of fuel injected will be decreased


正确答案： A
解析： 暂无解析

第6题：

单选题
When lighting off an auxiliary boiler, which of the problems listed could cause the burners to sputter?（）
A

cold fuel oil

B

low fuel oil pressure

C

low atomizing steam pressure

D

water in the fuel oil


正确答案： C
解析： 暂无解析

第7题：

单选题
Fuels of different qualities may require advancing or retarding the injection timing, in addition to which if the injection timing is advanced when the engine is running at loads below the （）, then a saving in fuel can be achieved.
A

BHP

B

MCR

C

IHP

D

MEP


正确答案： C
解析： 暂无解析

第8题：

The plunger in a jerk pump is rotated until the release port is uncovered If the port remains uncovered all of the time, which of the listed operations will occur?

A.No fuel will be delivered

B.The maximum effective stroke will be attained

C.The fuel delivered to the cylinder will be excessive

D.The injection nozzle will overheat and carbonize


正确答案：A

第9题：

单选题
If a single cylinder relief valve on a main propulsion diesel engine begins to lift, but it is not possible to secure the engine, which of the following actions should be taken?（）
A

Increase the cooling water flow to the engine

B

Secure or reduce fuel to that cylinder

C

Screw down on the pressure adjusting spring to decrease to decrease popping pressure

D

Readjust the injection timing


正确答案： A
解析： 暂无解析

第10题：

单选题
When the opening pressure of a diesel engine fuel injector is greater than that specified by the engine manufacturer, which of the following problems can be expected?（）
A

Quantity of fuel injected tends to be decreased

B

Quantity of fuel injected will always be increased

C

Start of injection tends to be advanced

D

Duration of injection will always greater


正确答案： A
解析： 暂无解析

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