MCC-NH Gas Fitters Practice Exam

What is the minimum duration for a pressure test on piping with a volume less than 10 cubic feet?

1. 5 minutes minimum, 24 hours maximum

2. 10 minutes minimum, 24 hours maximum

3. 15 minutes minimum, 12 hours maximum

4. 30 minutes minimum, 12 hours maximum

The correct answer is: 10 minutes minimum, 24 hours maximum

The minimum duration for a pressure test on piping with a volume less than 10 cubic feet is set to ensure that any potential leaks can be detected effectively. A minimum of 10 minutes is a practical timeframe, allowing enough time to monitor for pressure drops that could indicate a leak. This duration balances the need to confirm the integrity of the piping system without being overly lengthy, as longer tests might not provide significant additional information in relation to leaks for smaller volumes. The maximum timeframe of 24 hours is designed to ensure that the tests are carried out promptly while still allowing flexibility in scheduling and execution. By adhering to this standard, gas fitters can maintain safety and efficacy in their installations and maintenance tasks.