题目内容 （请给出正确答案）
[单选题]

The purpose of valve springs is to （).A.keep valves close when the camshaft is not lift

A.keep valves close when the camshaft is not lifting the valv

B.keep valves open

C.keep valve float

D.keep valves bounce

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更多“The purpose of valve springs i…”相关的问题

第1题

What is the purpose of the relief valve of a cargo pump ________．A.Provides for the remova

What is the purpose of the relief valve of a cargo pump ________．

A.Provides for the removal of vapors

B.Allows two or more tanks to be filled at the same time

C.Provides for the emergency shutdown of the pump

D.Permits the return of cargo to the suction side of the pump

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第2题

调节阀相当于一个可以调节的局部阻力件，随着阀门开启程度的不同，阻力也不同，从而达到对流量和压力参数进行调节的目的。Regulating valve is equivalent to a local resistance can be adjusted, with the degree of valve opening, resistance is different, so as to achieve the purpose of regulating the flow and pressure parameters.
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第3题

There are two basic types of engine valves（).A.the intake valve and the inlet valveB.the

A.the intake valve and the inlet valve

B.the intake valve and the inlet valve

C.the output valve and the inlet valve

D.the exhaust valve and the output valve

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第4题

Which of the following valve guards the atrioventricular orifice between the right atrium and the right ventricle？（)

A.tricuspid valve

B.bicuspid valve

C.mitral valve

D.semilunar valve

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第5题

The valve on the discharge side of a cargo pump on a tank vessel will usually be a ______.

A.butterfly valve

B.spectacle valve

C.check valve

D.globe valve

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第6题

The period of valve overlap is when（）

A．the inlet valve is open

B．the exhaust valve is open

C．both valves are close

D．both valves are ope

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第7题

According to the location of the camshaft, the valve trains are divided into overhead

A.valve seat

B.valve guid type

C.side camshaft type

D.intake valve and exhaust

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第8题

In the piping systems of a vessel，what type of valve gives the least resistance to fluid f
low when fully open ________．

A.Globe valve

B.Butterfly valve

C.Gate valve

D.Packless valve

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第9题

旅客氧气系统中那个活门打开会导致系统工作灯（SYSON)点亮？（)

A.系统关断活门sys shutoff valve

B.主分配关断活门main distribution valve

C.通风活门ventilation valve

D.人工关断活门manual shutoff valve

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第10题

valve float 意思是气门反跳。（)

valve float 意思是气门反跳。()

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