BGE Natural Gas Systems & Pipelines 3

Question 1

Per 49 CFR Part 192, how frequently must gas distribution mains located in business districts be surveyed for leaks using leak detection equipment?

Accepted Answer

At least once per calendar year

Answer

Once every 5 years

Answer

At least twice per calendar year

Answer

Once every 3 years

Question 2

What is the purpose of the relief valve on a natural gas service pressure regulator?

Accepted Answer

To vent excess gas if downstream pressure exceeds a safe limit

Answer

To increase downstream pressure when demand is high

Answer

To prevent gas from flowing backward into the main

Answer

To filter debris from the gas stream before it enters the regulator

Question 3

What is 'pipeline pigging' in the context of natural gas transmission and distribution operations?

Accepted Answer

Sending a device through a pipeline to clean, inspect, or separate products

Answer

A method of pressure testing a new main before placing it in service

Answer

Installing a bypass loop around a failing pipe segment

Answer

Purging a pipeline with inert gas before welding

Question 4

What does DIMP stand for in the context of natural gas pipeline safety management?

Accepted Answer

Distribution Integrity Management Program

Answer

Distributed Infrastructure Monitoring Protocol

Answer

Diagnostic Inspection and Maintenance Procedure

Answer

Daily Inspection and Meter Performance

Question 5

What is the minimum required burial depth for natural gas distribution service lines installed in residential areas under normal conditions per industry standards?

Accepted Answer

24 inches

Answer

12 inches

Answer

18 inches

Answer

36 inches

Question 6

What type of joining method is required when connecting polyethylene (PE) gas pipe in the field for a permanent, pressure-rated joint?

Accepted Answer

Electrofusion or butt fusion

Answer

Solvent cementing

Answer

Push-to-connect fittings

Answer

Mechanical compression couplings

Question 7

What is the primary purpose of a curb valve (service valve) installed on a natural gas service line near the property line?

Accepted Answer

To allow utility workers to shut off gas at the curb without entering private property

Answer

To regulate gas pressure to the meter set

Answer

To measure gas consumption for billing purposes

Answer

To protect the service line from excess flow in a pipe break