Master Plumber Exam Plumbing Codes and Regulations 2

Question 1

Under the UPC, what is the minimum trap seal depth required for fixture traps?

Accepted Answer

2 inches

Answer

The UPC requires a minimum trap seal depth of 2 inches to prevent sewer gases from entering the building.

Question 2

According to the IPC, what is the maximum developed length for a fixture drain from the trap weir to the vent connection?

Accepted Answer

8 feet

Answer

The IPC allows a maximum developed length of 8 feet from the trap weir to the vent for most fixtures.

Question 3

Which code body publishes the Uniform Plumbing Code (UPC)?

Accepted Answer

IAPMO

Answer

The International Association of Plumbing and Mechanical Officials (IAPMO) publishes and maintains the UPC.

Question 4

Under the IPC, a 3-inch horizontal drain serving a water closet must have a minimum slope of:

Accepted Answer

1/4 inch per foot

Answer

The IPC requires 3-inch and larger horizontal drains to slope at a minimum of 1/4 inch per foot toward the outlet.

Question 5

Which of the following materials is NOT permitted for gas supply piping under most model plumbing codes?

Accepted Answer

PVC

Answer

PVC is not approved for gas supply piping because it is combustible and cannot withstand gas pressure and heat requirements.

Master Plumber Exam Practice Test