RMGA Gas Distribution Systems

Question 1

What is the typical operating pressure range for a low-pressure natural gas distribution system serving residential customers?

Accepted Answer

0.25 to 2 psig

Answer

Low-pressure residential distribution systems typically operate between 0.25 and 2 psig to safely supply gas to home appliances.

Question 2

What material is most commonly used for new natural gas distribution mains installed in the United States?

Accepted Answer

Polyethylene (PE)

Answer

Polyethylene pipe is the dominant material for new gas distribution mains due to its corrosion resistance, flexibility, and ease of installation.

Question 3

What is the purpose of a service line in a natural gas distribution system?

Accepted Answer

To connect the distribution main to the customer's meter

Answer

A service line is the piping that connects the distribution main to the customer's meter set assembly.

Question 4

What does the acronym 'PE' stand for when referring to gas distribution pipe material?

Accepted Answer

Polyethylene

Answer

PE stands for polyethylene, a thermoplastic material widely used for natural gas distribution piping.

Question 5

What is the purpose of installing a curb valve on a gas service line?

Accepted Answer

To isolate the service line at the property line for emergency shutoff

Answer

A curb valve allows the utility or emergency responders to quickly shut off gas supply at the property boundary without entering the building.

RMGA - Rocky Mountain Gas Association Practice Test