Journeyman Plumbers Exam Gas Piping Systems 3

Question 1

What is the required pressure test for new gas piping before placing it in service under the International Fuel Gas Code?

Accepted Answer

3 psi for 10 minutes

Answer

New gas piping systems must be pressure tested at no less than 3 psi gauge for a minimum of 10 minutes to verify there are no leaks before the gas is turned on.

Question 2

A gas appliance connector flexible hose may NOT be used to connect which type of appliance?

Accepted Answer

Built-in oven

Answer

Built-in ovens are considered permanently installed appliances and must be connected with rigid piping, not flexible appliance connectors.

Question 3

When gas piping passes through a wall, floor, or ceiling, it must be protected by:

Accepted Answer

A sleeve or protective coating

Answer

Gas piping penetrating walls, floors, or ceilings must be protected with a sleeve or protective coating to prevent abrasion damage to the pipe.

Question 4

What is the specific gravity of propane compared to air?

Accepted Answer

1.5 (heavier than air)

Answer

Propane has a specific gravity of approximately 1.5, making it heavier than air, which causes it to settle in low areas such as basements and pits.

Question 5

The BTU content of one cubic foot of natural gas is approximately:

Accepted Answer

1,000 BTU

Answer

Natural gas contains approximately 1,000 BTU per cubic foot, a value used in load calculations when sizing gas piping and meters.

Journeyman Plumbers Exam Practice Test

Journeyman Plumbers Exam Practice Test

Journeyman Plumbers Exam Gas Piping Systems 3