MCC-NH Gas Fitters Practice Exam

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Prepare for the MCC-NH Gas Fitters Test. Study with flashcards and multiple choice questions, each question has hints and explanations. Get ready for your exam!

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What is the consequence of a major rupture in the piping system regarding excess flow valves?

They remain inactive
They allow continuous flow
They stop the flow of gas
They automatically vent gas

The correct answer is: They stop the flow of gas

A major rupture in the piping system triggers the excess flow valves to stop the flow of gas. These valves are designed to prevent excessive gas release in the event of a significant leak, such as a rupture. When the flow exceeds a predetermined limit, indicating a potential danger, the valve closes, effectively halting the gas supply. This mechanism is crucial for safety, as it minimizes the risk of gas dispersal into the environment, which could lead to hazardous situations, including fires or explosions. Understanding the functioning of excess flow valves is essential for gas fitters, as they must ensure these safety devices are correctly installed and operational to protect both the system and occupants from gas leaks.