Master Plumber Exam Plumbing Codes and Standards 2

Question 1

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

Accepted Answer

2 inches

Answer

The IPC requires fixture traps to maintain a minimum seal depth of 2 inches and a maximum of 4 inches.

Question 2

Which organization publishes the Uniform Plumbing Code (UPC) used in many western US states?

Accepted Answer

IAPMO

Answer

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

Question 3

Per the IPC, what is the maximum distance a P-trap can be located from the fixture outlet it serves?

Accepted Answer

24 inches

Answer

The IPC allows a maximum of 24 inches between a fixture outlet and the trap weir.

Question 4

According to the IPC, which pipe material is NOT approved for use as a building drain?

Accepted Answer

CPVC

Answer

CPVC is approved for hot and cold water supply but is not listed for use as a building drain or sanitary drainage piping.

Question 5

Under the IPC, what type of fitting is required when changing direction from vertical to horizontal in a drainage system?

Accepted Answer

Long-turn 90° elbow or two 45° elbows

Answer

The IPC requires long-sweep fittings or combinations of 45° fittings when changing from vertical to horizontal drainage flow.

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