搜题

【单选题】

The needle valve in the injector （） at a pre-set pressure which ensures that the fuel will atomize once it enters the cylinder.

A、will lift

B、will be lifted

C、will close

D、will be closed

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更多“The needle valve in the injector （） at a pre-set pressure which ensures that the fuel will atomize once it enters the cylinder.”相关的问题

第1题

[单选题] During the fuel injection period, fuel pressure must exceed cylinder gas pressure to （）.

A、ensure penetration and distribution of the fuel in the combustion chamber B、ensure the needle valve is flushed clean during each injection C、prevent combustion gas blowback into the open needle valve D、prevent reflected pressure waves when the needle valve closes

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第2题

[单选题] The needle valve in a fuel valve will （） when the fuel pressure action on the needle valve tapered face exerts a force lower than that of the spring compression.

A、be jammed B、be opened C、be seated D、be broken

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第3题

[单选题] Which of the valves listed should be used either in the fully opened or the fully closed position?（）

A、A gate valve B、A globe valve C、Any check valve D、Any needle valve

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第4题

[单选题] When the heat load begins to increase, the needle valve of an expansion valve will（）

A、move in an opening direction B、move in a closing direction C、either open or close D、not move at all

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第5题

[单选题] A large change in ambient temperature, or using an oil of a viscosity different from the one recommended by the manufacturer in a mechanical hydraulic governor, will result in the need to adjust the （）.

A、pilot valve opening B、compensating needle valve C、compensating spring tension D、accumulator spring tension

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第6题

[单选题] The needle valve will open when the fuel pressure acting on the needle valve （） exerts a sufficient force to overcome the spring compression.

A、tape face B、tapered face C、surface D、thinner face

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第7题

[单选题] A spring-loaded centrifugal flyweight governor responds to reduced engine load with an immediate increase in （）

A、pilot valve oil pressure B、speeder spring force C、compensation needle valve clearance D、centrifugal force on the flyweights

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第8题

[] The （） in the injector will lift at a pre-set pressure which ensures that the fuel will atomize once it enters the cylinder.

A、A.needle valve B、B.nozzles C、C.piston D、D.spring

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第9题

[单选题] 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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