Red Seal Gasfitter — Class B Practice Exam

What is the primary function of a gas regulator?

1. To inject fuel into the combustion chamber

2. To measure gas consumption

3. To control the pressure of gas delivered to appliances

4. To ignite the gas in appliances

The correct answer is: To control the pressure of gas delivered to appliances

The primary function of a gas regulator is to control the pressure of gas delivered to appliances. Gas regulators are critical components in gas distribution systems, as they ensure that the gas pressure is maintained at optimal levels for safe and efficient operation of gas-powered appliances. By reducing the high pressure from the gas supply line to a lower, usable pressure, regulators help to prevent fluctuations that could lead to malfunctioning appliances or dangerous situations. Gas appliances are designed to operate within specific pressure ranges, and the regulator ensures that the gas entering these appliances meets these specifications. This is vital for achieving proper combustion, maintaining efficiency, and minimizing emissions. The ability to regulate pressure effectively directly influences the performance and safety of gas appliances, making it an essential function in any gas system.