Mechanical, Plumbing, and Electrical Code Professionals Flashcards

Under the IPC, which venting method allows a single vent pipe to serve multiple fixtures on the same floor level without individual fixture vents?

Answer: Circuit vent

A circuit vent serves a group of up to eight fixtures connected to a horizontal branch drain, eliminating the need for individual fixture vents.

The NEC requires arc-fault circuit interrupter (AFCI) protection for all 120-volt, 15- and 20-ampere branch circuits in which of the following areas of a dwelling unit?

Answer: All areas of the dwelling unit

NEC 210.12(A) now requires AFCI protection for all 120-volt, 15- and 20-ampere branch circuits throughout the entire dwelling unit.

According to the International Mechanical Code, the minimum slope for a condensate drain line from air conditioning equipment is:

Answer: 1/8 inch per foot

IMC Section 307.2.1 requires condensate drain lines to slope a minimum of 1/8 inch per foot toward the point of disposal.

Under the IPC, what is the minimum size of a building drain receiving the discharge of a water closet?

Answer: 3 inches

IPC Section 704.1 requires that any building drain or horizontal branch receiving the discharge of a water closet be at least 3 inches in diameter.

In the NEC, a multiwire branch circuit must have a means to simultaneously disconnect all ungrounded conductors at the:

Answer: Point where the circuit originates (panel)

NEC 210.4(B) requires that multiwire branch circuits have a means to disconnect all ungrounded conductors simultaneously at the point of origin (the panel).

Under the International Mechanical Code, which appliance category describes a gas appliance with a flue loss of less than 17% and a positive vent static pressure?

Answer: Category III

IMC Appendix B defines Category III appliances as having a positive vent static pressure and a flue gas loss less than 17%, requiring sealed venting.

The IPC requires that the flood level rim of a fixture be located at a minimum distance above the top of the trap weir of:

Answer: The trap seal depth (2–4 inches)

The IPC requires the fixture flood rim to be above the trap weir by at least the depth of the trap seal (2 to 4 inches) to prevent backflow from surcharged drains.