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

A combustible gas indicator (CGI) detects the presence of flammable gas vapors in air, making it the standard tool for locating natural gas leaks.

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

Natural gas (methane) has a LEL of approximately 5% by volume in air; below this concentration the mixture is too lean to ignite.

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

Federal and industry guidelines require hand-digging within 18 inches on each side of a marked underground gas facility to avoid striking the pipe.

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

Squeeze-off uses a specialized tool to flatten and compress polyethylene pipe walls together, temporarily stopping gas flow without cutting the pipe or shutting a valve.

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

Life safety is the top priority; immediate evacuation and calling 911 from outside ensures occupants are safe before any technical response begins.

(BGE) Baltimore Gas and Electric Practice Test

(BGE) Baltimore Gas and Electric Practice Test

BGE Natural Gas Systems & Pipelines 2