MCC-NH Gas Fitters Practice Exam

When work interruptions occur in a piping system, the correct action is to close all valves and cap openings. This procedure is essential for ensuring the safety and integrity of the gas system. Closing the valves prevents any gas from escaping and significantly reduces the risk of leaks, which could lead to hazardous situations. Capping openings is similarly critical; it further ensures that no contaminants can enter the system, maintaining its operational integrity when work resumes. This precautionary measure is a standard practice in gas fitting to protect both the workers and the public from potential dangers associated with gas leaks. Leaving valves open would pose a significant safety risk, increasing the chances of gas leaks. Simply notifying the gas supplier without taking additional safety measures does not adequately address the immediate safety concerns. Continuing operations as normal in the presence of an interruption could lead to serious accidents and is not in line with safety protocols. Therefore, properly capping and closing valves is the responsible and safe course of action during work interruptions in a gas piping system.