City Of Chicago Boiler Practice Exam

A safety valve will ___.

Prevent the boiler from exceeding its MAWP Regulate boiler temperature Increase pressure Pop open

Correct Answer:

Pop open

Explanation:

The essential idea is that a safety valve relieves pressure by opening to vent steam. It is designed to lift at a set pressure so that steam can escape and prevent the boiler from going over its maximum allowable working pressure. The immediate action you observe is the valve popping open, releasing steam, and then reseating once pressure drops. It isn't meant to regulate temperature or to increase pressure, and while it prevents reaching the MAWP, the specific, observable function is to pop open.

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