BGE Natural Gas Systems & Pipelines

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

50 to 100 psig

Answer

10 to 20 psig

Answer

200 to 400 psig

Question 2

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

Accepted Answer

Polyethylene (PE)

Answer

Cast iron

Answer

Galvanized steel

Answer

Copper

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

Methanol — sweet alcohol scent

Answer

Acetylene — garlic-like odor

Answer

Propane — faint oily odor

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

To increase gas flow velocity

Answer

To detect gas leaks electronically

Answer

To regulate operating pressure

Question 5

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

Accepted Answer

49 CFR Part 192

Answer

OSHA 29 CFR Part 1910

Answer

NFPA 54

Answer

DOT 40 CFR Part 60

Question 6

What is the primary function of a pressure regulating station (PRS) in a natural gas distribution system?

Accepted Answer

To reduce high transmission pressure to safe distribution pressure

Answer

To add odorant to the gas supply

Answer

To measure customer usage for billing

Answer

To remove moisture and contaminants from gas

Question 7

In a natural gas distribution system, what does the term 'Maximum Allowable Operating Pressure' (MAOP) refer to?

Accepted Answer

The highest pressure at which a pipeline segment may be continuously operated

Answer

The minimum pressure needed to serve customers during peak demand

Answer

The pressure at which a relief valve automatically opens

Answer

The standard test pressure applied during hydrostatic testing