Master Plumber Exam Plumbing Codes and Standards 3

Question 1

Under the IPC, a fixture with a flood rim located below the adjacent roof must be protected against backflow by which device?

Accepted Answer

Air gap

Answer

An air gap is the only backflow protection method acceptable when the flood rim is below the roof or other overflow point presenting a high hazard.

Question 2

Per the IPC, what is the required minimum air gap distance for a kitchen sink faucet with a 1/2-inch supply pipe?

Accepted Answer

1-1/2 inches

Answer

The IPC requires an air gap of at least 1-1/2 times the effective opening diameter, with a minimum of 1 inch, but the standard minimum for most fixtures is 1 inch for supply openings up to 1/2 inch.

Question 3

Under the IPC, which of the following fixtures requires a floor drain to be installed within a specific proximity under certain occupancy conditions?

Accepted Answer

Water heater relief valve discharge

Answer

The IPC requires the T&P relief valve discharge to terminate to the outside, a safe pan, or within 6 inches of the floor or to a floor drain.

Question 4

According to the IPC, the developed length of a trap arm for a 1-1/2 inch trap shall not exceed:

Accepted Answer

5 feet

Answer

Per IPC Table 909.1, a 1-1/2 inch diameter trap arm has a maximum developed length of 5 feet to the vent.

Question 5

Per the IPC, which of the following is NOT a recognized method of venting a plumbing system?

Accepted Answer

Cross venting

Answer

Cross venting is not a recognized venting method under the IPC; approved methods include individual, common, wet, circuit, and combination drain and vent.

Master Plumber Exam Practice Test

Master Plumber Exam Practice Test

Master Plumber Exam Plumbing Codes and Standards 3