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A diesel engine will lose power if fuel injection occurs too

题目
单选题
A diesel engine will lose power if fuel injection occurs too early because the （）
A

fuel will not be properly atomized in the cylinder

B

ignition will be delayed due to low ignition temperature

C

maximum fuel expansion will occur on the compression stroke

D

fuel will ignite before top dead center

参考答案和解析
正确答案： A
解析： 暂无解析
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相似问题和答案

第1题：

_______can be a direct cause of faulty operation of diesel engine fuel injection nozzles.

A.Excessive fuel nozzle holder cooling

B.Sediment in the fuel supply

C.Distortion of the fuel spray pattern

D.Improper atomization of the fuel


正确答案：B

第2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3题：

If the diesel engine fuel injection timing is changed to delay the start of injection until the pistons are at top dead center, the engine will_________.

A.backfire through the air intakes

B.develop less power under load

C.have high firing pressures

D.lift its cylinder relief valves


正确答案：B

第4题：

单选题
A drop in compression pressure in one cylinder of a diesel engine can be caused by（）
A

a leaking fuel injection nozzle

B

a clogged air filter

C

early fuel injection

D

burned valves


正确答案： B
解析： 暂无解析

第5题：

单选题
Problems with the diesel engine fuel injection pump are usually caused by（）
A

improper adjustment

B

contaminated fuel

C

kinked fuel lines

D

excessive engine vibration


正确答案： C
解析： 暂无解析

第6题：

One cause of diesel engine surging can be a result of ______.

A.injection pump plungers stuck or worn

B.low compression

C.solenoid stuck open

D.fuel tank too full


正确答案：A

第7题：

单选题
The burning of fuel oil in a diesel engine having a high sodium content, will cause （）
A

corrosion and grooving of exhaust valves

B

corrosion and gumming of the fuel injection pump

C

salt deposits in the exhaust manifold

D

slag deposits in the fuel injection equipment


正确答案： A
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
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

第10题：

单选题
Turbulence is created in the cylinders of a diesel engine to （）
A

obtain injection lag

B

help mix fuel and air

C

increase combustion pressure

D

utilize higher injection pressures


正确答案： B
解析： 暂无解析

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