2024 P2 Commercial Plumbing Inspector Exam

When performing a water test on a rough plumbing drainage and vent system, the water must be kept in the system for at least 15 minutes, and applied with a minimum of a ________ head of water.

Where piping passes through a foundation wall, it must be protected by a relieving arch or a pipe sleeve. The sleeve must be built so that it is at least ________ larger than the pipe passing through.

If the bottom of a trench is excavated below the required grade for a pipe, the trench must be brought back to the proper grade by backfilling with:

Tempered water delivered from public hand-washing facilities (public lavatories) must be limited to a maximum temperature of:

In commercial assembly occupancies, urinals may be substituted for a maximum of ________ of the required water closets in men's restrooms.

To conserve water, what is the maximum allowable flow rate for a public hand-washing lavatory faucet at 60 psi?

Standard plumbing fixtures generally require a minimum working pressure of 8 psi. However, water closets utilizing a flushometer valve require a minimum working pressure of:

When installing a Reduced Pressure Zone (RPZ) backflow preventer assembly, it must be installed with a minimum clearance of ________ above the floor or finished grade to ensure the relief valve can discharge freely.

Underground water service piping and building sewer piping must generally be separated by undisturbed or compacted earth. What is the minimum required horizontal separation distance?

What is the minimum required uniform slope for a 4-inch diameter horizontal drainage pipe?

A cleanout is required for each change in direction of the horizontal building drainage system that is greater than:

A food preparation sink in a commercial kitchen must discharge through an indirect waste pipe. The air gap provided must be at least twice the effective opening of the indirect waste pipe, but never less than:

A commercial dishwashing machine is permitted to discharge its waste into the drainage system through an:

When a dry vent connects to a horizontal drain, the vent must rise vertically to a minimum of ________ above the flood level rim of the highest fixture being served before it can travel horizontally.

A circuit vent is a single vent that serves multiple fixtures installed on a horizontal branch drain. What is the maximum number of fixtures a single circuit vent can serve?

For a 2-inch diameter trap arm (fixture drain) installed at a standard 1/4-inch per foot slope, what is the maximum allowable developed length from the trap weir to the vent fitting?

The maximum allowable vertical drop from a fixture outlet to the trap weir is:n.

Floor drains located in mechanical rooms or other areas where they are subject to evaporation must be protected from losing their trap seal by the installation of a:

The sizing of primary roof drains, storm drainage piping, and gutters is based on the maximum ________ hourly rainfall rate for the specific geographic location.

Secondary (emergency) roof drain systems must have an independent piping system that discharges: