BGE Natural Gas Systems & Pipelines 1

Question 1

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

Accepted Answer

0.25 to 2 psig

Answer

Low-pressure residential distribution mains typically operate between 0.25 and 2 psig, which is safe for household appliances.

Question 2

Which material is most commonly used for new natural gas distribution pipelines installed in residential areas?

Accepted Answer

Polyethylene (PE)

Answer

Polyethylene pipe is the industry standard for new residential gas distribution due to its corrosion resistance, flexibility, and ease of fusion joining.

Question 3

What odorant is added to natural gas to make leaks detectable, and what does it smell like?

Accepted Answer

Mercaptan (THT) — rotten egg or sulfur smell

Answer

Mercaptan (tetrahydrothiophene) is injected into natural gas to produce the distinctive rotten egg smell that alerts people to leaks.

Question 4

What is the primary purpose of cathodic protection systems installed on underground steel gas pipelines?

Accepted Answer

To prevent electrochemical corrosion of the pipe

Answer

Cathodic protection applies an electrical current to counteract the electrochemical reactions that cause corrosion on buried metal pipelines.

Question 5

Which federal regulation establishes the minimum safety standards for natural gas distribution pipeline systems?

Accepted Answer

49 CFR Part 192

Answer

49 CFR Part 192 (Transportation of Natural and Other Gas by Pipeline) is the federal regulation governing safety standards for natural gas pipeline systems.

(BGE) Baltimore Gas and Electric Practice Test

(BGE) Baltimore Gas and Electric Practice Test

BGE Natural Gas Systems & Pipelines 1