搜题

【单选题】

The safety valves are mounted in pairs to （） the boiler against overpressure.

A、use

B、release

C、protect

D、effect

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更多“The safety valves are mounted in pairs to （） the boiler against overpressure.”相关的问题

第1题

[单选题] （） are used to limit the pressure in any particular portion and mainly control the pressure after the valve.

A、Relief valves B、Check valves C、Safety valves D、Reducing valve

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第2题

[单选题] Impurities from the boiler water surface can be removed through the （）.

A、safety valve B、blow down valve C、scum valve D、feed check valve

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第3题

[] Impurities from the boiler water surface can be removed through the （）.

A、A.safety valve B、B.blow down valve C、C.scum valve D、D.feed check valve

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第4题

[单选题] The lifting pressure of （） is set in the presence of a Surveyor it is locked and cannot be changed.

A、fuel valves of main engine B、injector pump of main engine C、safety valves of marine boiler D、safety valves of a reciprocating pump

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第5题

[单选题] Opening of the cylinder （） will admit compressed air into the cylinder.

A、safety valve B、indicator cock C、blow-down valve D、start valve

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第6题

[单选题] In a hydraulic system, （） are used to protect the system from over pressure.

A、stop valves B、check valves C、safety valves D、reducing valves

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第7题

[单选题] （） are mounted in pairs to protect the boiler against overpressure.

A、Safety valves B、Water tubes C、Steam stop valves D、Blow down valves

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第8题

[单选题] In some type of two-stroke engines, besides some small holes for（）, starting valve, safety valve, indicator cock, and central opening in each cylinder cover for mounting the（）

A、fuel valves；exhaust valve B、exhaust valves；inlet valve C、fuel valves；inlet valve D、exhaust valves；fuel valve

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第9题

[单选题] The device used for preventing the passage of flames into enclosed spaces is called a （）.

A、flame relief valve B、flame stopper C、safety valve D、flame arrester

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第10题

[单选题] （） play a very important part in hydraulic systems by preventing interaction between different parts of the hydraulic circuit.

A、Motors B、Check valves C、Safety valves D、Reducing valve

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