Plumbing Plumbing Codes & Safety

Question 1

Which model plumbing code is most widely adopted in the United States?

Accepted Answer

Both UPC and IPC are widely adopted

Answer

Uniform Plumbing Code (UPC)

Answer

International Plumbing Code (IPC)

Answer

National Standard Plumbing Code (NSPC)

Question 2

What is required before starting a major plumbing project in most US jurisdictions?

Accepted Answer

A plumbing permit from the local authority having jurisdiction (AHJ)

Answer

Homeowner approval only

Answer

Insurance notification

Answer

Utility company approval

Question 3

What does the term 'authority having jurisdiction' (AHJ) mean in plumbing codes?

Accepted Answer

The local government body or official responsible for enforcing building and plumbing codes

Answer

The national plumbing standards board

Answer

The plumber's licensing board

Answer

The manufacturer of plumbing products

Question 4

What is a 'fixture unit' (DFU) used for in plumbing design?

Accepted Answer

A unit to calculate the drainage load that a fixture imposes on the drainage system

Answer

A measurement of pipe wall thickness

Answer

A measure of water supply pressure

Answer

A standard pipe length measurement

Question 5

What does a 'rough inspection' verify in plumbing construction?

Accepted Answer

That all rough-in pipe installations are correct before walls are closed

Answer

That finish fixtures are properly installed

Answer

That the water heater is functioning

Answer

That fixtures meet ADA requirements

Question 6

What is required to legally perform plumbing work for hire in most US states?

Accepted Answer

A state-issued plumbing license (journeyman or master)

Answer

A general contractor license

Answer

Homeowner authorization only

Answer

A business license only