High School

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What valve is used to protect the primary circuit from the secondary circuit?

a) Check valve
b) Pressure relief valve
c) Globe valve
d) Gate valve

Answer :

Final answer:

The valve used to protect the primary circuit from the secondary circuit is the check valve, which prevents backflow and protects against contamination or damage.

Explanation:

The valve used to protect the primary circuit from the secondary circuit is a) Check valve. The primary function of a check valve is to prevent backflow in a system. It allows fluid to flow through it in one direction only, ensuring that the high-pressure fluid from the primary circuit does not contaminate or damage the secondary circuit. This is crucial in applications such as water and sewage systems, where the flow of clean water must be protected from contamination by waste water.

A pressure relief valve is designed to protect a system against overpressure by releasing the excess pressure once a set value is reached. A globe valve is used for regulating flow in a pipeline, and a gate valve is mainly for on/off control with low pressure drop.

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