Red Seal Gasfitter — Class A Practice Exam

What is a gas pressure test instrument commonly referred to as?

1. Barometer

2. Manometer

3. Altimeter

4. Thermometer

The correct answer is: Manometer

A gas pressure test instrument is commonly referred to as a manometer. This device is specifically designed to measure the pressure of gases and is essential in applications where gas pressure needs to be monitored or tested, such as in gas fitting and piping systems. Manometers utilize a column of liquid to gauge pressure differences, providing an accurate reading of how much pressure is exerted by the gas being tested. They can be used in both residential and commercial settings to ensure that gas systems are operating within safe and acceptable pressure ranges. In contrast, a barometer measures atmospheric pressure and is used in meteorology, an altimeter measures altitude by determining atmospheric pressure, and a thermometer gauges temperature. These instruments serve entirely different purposes and are not suited for measuring gas pressure in the way that a manometer does. Understanding the specific function of each instrument helps in recognizing why the manometer is the correct answer for gas pressure testing.