G3 - Gas Technician Level 3 Appliance Installation and Service Questions and Answers Flashcards

What is the minimum clearance from combustible materials typically required when installing a gas-fired forced-air furnace in the US?

Answer: Follow manufacturer's listed clearances

Appliance clearances must follow the manufacturer's listed installation instructions, which are based on testing and listing by a recognized authority.

Before lighting a gas appliance pilot, a technician should first:

Answer: Check that the area is free of gas odor and purge any accumulated gas

Purging accumulated gas and confirming no gas odor prevents ignition of a potentially explosive mixture.

When installing a gas dryer, the flexible connector between the dryer and the house piping must be:

Answer: Approved for gas use and not concealed inside walls

Gas connectors for appliances must be listed for gas service and must remain accessible, not run inside walls or floors.

Which type of valve must be installed within 6 feet of a gas appliance and be accessible for shutoff?

Answer: Manual shutoff valve

A manual shutoff valve must be located within 6 feet of each appliance and remain readily accessible to quickly cut off gas supply in an emergency.

When connecting a gas range in the US, the appliance connector should be:

Answer: A listed flexible metal connector no longer than 6 feet

ANSI Z21.69/CSA 6.16 requires listed flexible connectors for gas ranges, limited to 6 feet in length.

A gas appliance that is 'listed' means it has been:

Answer: Evaluated and certified by a nationally recognized testing laboratory

A listed appliance has been evaluated against applicable safety standards by an NRTL such as UL or CSA.