BGE Natural Gas Systems & Pipelines 2

Question 1

Which instrument is most commonly used by BGE technicians to detect natural gas leaks along distribution mains and service lines?

Accepted Answer

Combustible gas indicator (CGI)

Answer

Infrared thermometer

Answer

Clamp-on ammeter

Answer

Insulation resistance tester

Question 2

What is the Lower Explosive Limit (LEL) of natural gas (methane) in air, below which ignition cannot occur?

Accepted Answer

5% by volume

Answer

1% by volume

Answer

15% by volume

Answer

25% by volume

Question 3

When excavating near marked underground gas facilities, what is the required hand-digging tolerance zone on each side of the marked line per PHMSA guidelines?

Accepted Answer

18 inches

Answer

6 inches

Answer

24 inches

Answer

36 inches

Question 4

What is the 'squeeze-off' procedure used for in natural gas operations?

Accepted Answer

Temporarily stopping gas flow by mechanically compressing a PE pipe

Answer

Testing pipeline integrity under high pressure

Answer

Connecting a new service line to an active main

Answer

Purging air from a newly installed gas line

Question 5

What action should a BGE technician take FIRST upon discovering a natural gas leak inside an occupied building?

Accepted Answer

Evacuate the building and call 911 from a safe distance

Answer

Call the supervisor to report the leak before taking any action

Answer

Attempt to locate and shut the gas valve inside the building

Answer

Open windows to ventilate the space and monitor with a CGI

Question 6

What does yellow-colored warning tape buried above an underground gas pipeline indicate to excavators?

Accepted Answer

Caution — gas line below

Answer

High-voltage electric line below

Answer

Fiber optic cable below

Answer

Potable water main below

Question 7

Which type of valve is most commonly installed as the emergency shut-off device at a natural gas meter set on a residential service?

Accepted Answer

Ball valve

Answer

Gate valve

Answer

Butterfly valve

Answer

Globe valve