MCC-NH Gas Fitters Practice Exam

Which of the following is a requirement for gas piping installed outdoors?

1. Must be visible above ground

2. Must be protected from physical damage

3. Must be painted bright colors

4. Must be marked every meter

The correct answer is: Must be protected from physical damage

Gas piping installed outdoors must be protected from physical damage to ensure safety and integrity. This is crucial because outdoor installations are exposed to various environmental factors and potential impacts from vehicles, equipment, and other objects that could cause damage to the piping system. If the gas piping is not adequately protected, it could lead to leaks or ruptures, which can pose severe safety hazards, including explosions or gas build-up. The option of visibility above ground is important but does not specifically address the need for protection against damage. While painting pipes bright colors might help in visibility, it is not a requirement nor does it ensure the safety of the installation. Similarly, marking every meter could be helpful for identification and location purposes, but it does not intrinsically protect the piping itself from physical harm. Therefore, the requirement that outdoor gas piping must be protected from physical damage directly contributes to a safer environment and minimizes the risk of accidents associated with gas leakages or disruptions caused by external impacts.