Mixed Deck — All RMGA Topics Flashcards

What is the purpose of a gas appliance's manual shutoff valve located within 6 feet of the appliance?

Answer: To provide a means for the user or technician to quickly shut off gas to the appliance for service or emergency

A manual shutoff valve accessible near the appliance allows quick gas shutoff for maintenance, appliance replacement, or emergency response without shutting off service to the entire building.

What is a 'greenhouse gas reduction plan' typically required of gas utilities in states with climate legislation?

Answer: A documented strategy with targets and timelines for reducing the utility's methane and CO2 emissions from operations

States with climate goals may require gas utilities to develop reduction plans with specific emission targets, timelines, and strategies such as leak repair, infrastructure replacement, and RNG procurement.

Who is typically responsible for shutting off gas service during a structure fire when the fire department requests it?

Answer: The gas utility upon request from fire department or emergency responders

The gas utility is responsible for safely shutting off service when requested by fire or emergency personnel during a structure fire.

Which document is essential for a natural gas company to obtain before beginning construction of a new pipeline?

Answer: Environmental Impact Statement (EIS)

An Environmental Impact Statement (EIS) is necessary to evaluate the potential environmental effects of a proposed pipeline construction project.

What is the minimum depth of cover required for a steel gas transmission pipeline installed in a Class 1 location under 49 CFR Part 192?

Answer: 24 inches

49 CFR Part 192 requires a minimum cover of 24 inches for transmission pipelines in Class 1 locations.

What material is most commonly used for new natural gas distribution mains installed in the United States?

Answer: Polyethylene (PE)

Polyethylene pipe is the dominant material for new gas distribution mains due to its corrosion resistance, flexibility, and ease of installation.

What is 'directed inspection and maintenance' (DI&M) in the natural gas industry?

Answer: A targeted leak detection and repair approach that prioritizes fixing the largest emission sources first for maximum environmental benefit

DI&M focuses resources on identifying and repairing the largest leaks first, maximizing emission reductions per dollar spent compared to uniform leak survey programs.

What is 'leak survey frequency' determined by under 49 CFR Part 192 for gas distribution systems?

Answer: Business classification (e.g., business district vs. residential) and pipe material

Leak survey frequency under 49 CFR Part 192 depends on the business district classification and the pipe material, with more frequent surveys required for higher-risk areas.

What is the purpose of a 'gas watch' or 'gas patrol' after a major gas leak has been controlled?

Answer: To monitor for residual gas migration in soil or structures near the incident site

After a major leak, gas can migrate through soil and accumulate in buildings nearby; a gas watch involves monitoring surrounding structures until gas concentrations return to safe levels.

What is the primary safety concern with natural gas appliances?

Answer: Combustion and carbon monoxide poisoning

The primary safety concern with natural gas appliances is the risk of combustion and carbon monoxide poisoning due to incomplete combustion.

What is the correct procedure for restoring gas service after a supply interruption to multiple customers?

Answer: Restore pressure slowly, verify ignition sources are off, and relight pilots before full restoration

After an outage, pressure must be restored gradually, ignition sources must be controlled, and pilot lights must be verified or relit before full service restoration to prevent gas accumulation.

Why is it important to have regular maintenance of natural gas appliances?

Answer: To ensure efficient operation and safety

Regular maintenance of natural gas appliances is important to ensure they operate efficiently and safely, preventing leaks and the risk of carbon monoxide poisoning.

What is 'standby pilot consumption' and why is it relevant to gas appliance efficiency?

Answer: The continuous gas consumption of a standing pilot light that burns whether or not the appliance is in use

A standing pilot flame burns continuously, consuming gas even when the appliance is not in use, which reduces overall appliance efficiency compared to electronic ignition.

What is a key requirement for natural gas companies under the Clean Air Act?

Answer: Reporting greenhouse gas emissions

Under the Clean Air Act, natural gas companies are required to report greenhouse gas emissions to ensure compliance with environmental standards.

What is a 'pigging' operation in the context of natural gas pipelines?

Answer: Running a device through the pipeline for cleaning or inspection

Pigging involves sending a device called a pig through the pipeline interior to perform cleaning, inspection, or gauging.

What is the purpose of a meter bypass valve?

Answer: To allow gas to flow around the meter for meter replacement or testing without interrupting customer service

A meter bypass valve allows gas to continue flowing to the customer through an alternate path while the meter is removed, tested, or replaced.

What is the 'index' on a natural gas meter?

Answer: The register or display showing accumulated gas volume consumed

The index is the meter's register or display—a series of dials or a digital counter—showing the cumulative volume of gas that has passed through the meter.

What information must a gas operator collect when responding to a public report of a gas odor?

Answer: Location, time, description of odor, and whether anyone is inside the affected structure

First responders must collect the exact location, time of report, odor description, and occupancy status to prioritize and direct an effective emergency response.

What is the function of a pressure regulator built into a gas appliance (appliance regulator)?

Answer: To reduce the supply pressure to the specific pressure required by the appliance burner system

An appliance pressure regulator reduces the supply pressure to the precise level required by the appliance's burner design for safe and efficient operation.

What type of valve is typically installed at a pipeline's mainline to allow full bore flow with minimal restriction?

Answer: Ball valve

Ball valves provide full bore flow with minimal pressure drop and are widely used as mainline isolation valves in gas pipelines.