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[主观题]

Fuel is delivered into the combustion space by _____.A.a cooling systemB.a lubricating sys

Fuel is delivered into the combustion space by _____.

A.a cooling system

B.a lubricating system

C.an electric system

D.an injection system

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更多“Fuel is delivered into the com…”相关的问题

第1题

The amount of fuel delivered by a unit injector is controlled by the _____.A.camshaftB.mai

The amount of fuel delivered by a unit injector is controlled by the _____.

A.camshaft

B.main spring

C.rack position

D.nozzle orifice size

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第2题

The amount of fuel delivered for each cycle must be in accordance with the engine load, an

d the same quantity of fuel must be delivered to each cylinder for each power stroke at that loadWhich of the following statements describes this requirement？

A.Proper timing

B.Accurate metering

C.Suitable injection rate

D.Suitable atomization rate

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第3题

The plunger in a jerk pump is rotated until the release port is uncovered If the port rema

ins 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

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第4题

The purpose of the delivery check valve used in a diesel fuel injection jerk pump is to _____.

A.assist in a quick cutoff of fuel injection

B.allow oil backflow from the injector to the helix

C.reduce fuel oil pressure between injection strokes

D.meter the quantity of fuel delivered

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第5题

Which of the following problems will occur if the needle valve in a fuel injection nozzle

sticks in the open position？

A.Fuel injection timing will change

B.Nozzle operation will be unaffected

C.Fuel will leak into the drain line

D.Fuel will not be delivered

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第6题

On a diesel engine, fuel is delivered into the combustion space by _____.A.a cooling syste

On a diesel engine, fuel is delivered into the combustion space by _____.

A.a cooling system

B.a lubrication oil system

C.an electric system

D.an injection system

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第7题

Fuel is delivered into the combustion space by（）

A．cooling system

B．a lubricating system

C．an electric system

D．an injection system

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第8题

As the plunger moves up, the ports are closed and the fuel _____ and delivered to the inje

ctor nozzle at very high pressure.

A.being compressed

B.to be pumped up

C.is pressurized

D.are built up

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第9题

The amount of fuel delivered by a helical plunger fuel injection pump is controlled by ___

___.

A.varying the pump discharge pressure

B.varying the pump return pressure

C.rotation of the pump plunger

D.rotation of the pump barrel

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