Journeyman Plumbers Exam Gas Piping and Venting 4

Question 1

When installing a gas range in a kitchen, the flexible connector used must NOT exceed what length?

Accepted Answer

6 feet

Answer

Appliance connectors for gas ranges and similar equipment must not exceed 6 feet in length per NFPA 54.

Question 2

Natural gas has a specific gravity approximately:

Accepted Answer

Lighter than air (specific gravity less than 1.0)

Answer

Natural gas (primarily methane) has a specific gravity of about 0.6, making it lighter than air so it rises and dissipates upward.

Question 3

A gas vent that serves only one appliance and terminates through an exterior wall using an approved through-the-wall kit is known as:

Accepted Answer

A direct-vent (sealed combustion) system

Answer

A direct-vent (sealed combustion) appliance draws combustion air from outside and exhausts directly through the wall, using a coaxial or two-pipe assembly.

Question 4

Which of the following conditions ALWAYS requires a licensed plumber or gas fitter to obtain a permit before work begins?

Accepted Answer

Installing new gas piping or extending an existing gas line

Answer

Any new gas piping installation or extension of an existing gas system requires a permit to ensure the work is inspected and meets code.

Question 5

What is the minimum horizontal distance a gas meter must be located from an electrical meter or service panel?

Accepted Answer

3 feet

Answer

Gas meters must be installed at least 3 feet horizontally from electrical meters and service equipment to reduce ignition risk.

Journeyman Plumbers Exam Practice Test

Journeyman Plumbers Exam Practice Test

Journeyman Plumbers Exam Gas Piping and Venting 4