GPT GPT Gas Metering & Measurement 1 — Questions and Answers
Question 1: What is the primary function of a gas meter?
- Regulate gas pressure
- Measure the volume of gas consumed (Correct answer)
- Filter contaminants from gas
- Detect gas leaks
Correct answer: Measure the volume of gas consumed
A gas meter measures the volume of gas flowing through it, which is used by the utility to calculate customer billing charges.
Question 2: The most common type of residential gas meter is the:
- Turbine meter
- Orifice meter
- Diaphragm (bellows) meter (Correct answer)
- Ultrasonic meter
Correct answer: Diaphragm (bellows) meter
Diaphragm meters (bellows meters) are the most common residential type due to their accuracy, reliability, and low cost.
Question 3: Gas meter capacity is rated in:
- Gallons per minute
- Cubic feet per hour (CFH) (Correct answer)
- Pounds per square inch
- British thermal units (BTU)
Correct answer: Cubic feet per hour (CFH)
Gas meters are rated in cubic feet per hour (CFH), indicating the maximum flow rate the meter can accurately handle.
Question 4: What does the index on a gas meter display?
- Gas pressure at the meter
- Cumulative gas volume consumed (Correct answer)
- Current flow rate
- Gas temperature
Correct answer: Cumulative gas volume consumed
The meter index (dial or digital display) shows the total cumulative volume of gas that has passed through the meter since installation.
Question 5: A meter set assembly typically includes which combination of components?
- Regulator, meter, and service valve (Correct answer)
- Compressor, filter, and meter
- Pump, meter, and flow controller
- Meter, heat exchanger, and sensor
Correct answer: Regulator, meter, and service valve
A standard meter set assembly includes a service regulator to reduce pressure, the meter to measure flow, and a service valve for isolation.
Question 6: When installing a gas meter, the service valve should be positioned:
- Downstream of the meter
- On the outlet side only
- Upstream of the meter between the main and the meter (Correct answer)
- Inside the building
Correct answer: Upstream of the meter between the main and the meter
The service valve is installed upstream of the meter so gas can be safely shut off for meter installation, maintenance, or replacement.
GPT GPT Gas Metering & Measurement 1
What is the primary function of a gas meter?