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

50 to 100 psig

Answer

200 to 400 psig

Answer

500 to 1000 psig

Question 2

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

Accepted Answer

Polyethylene (PE)

Answer

Cast iron

Answer

Steel

Answer

Copper

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

To carry gas from the transmission line to the distribution main

Answer

To carry gas from the wellhead to a processing plant

Answer

To bypass a pressure regulator during maintenance

Question 4

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

Accepted Answer

Polyethylene

Answer

Pressure Elevated

Answer

Pipeline Engineering

Answer

Pre-qualified Equipment

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

To regulate pressure entering the building

Answer

To measure gas consumption

Answer

To prevent backflow from the building to the main

Question 6

What is the minimum burial depth for a polyethylene gas distribution main in a normal excavated trench?

Accepted Answer

18 inches

Answer

6 inches

Answer

12 inches

Answer

24 inches