ICC Mechanical, Plumbing, and Electrical Code Professionals 4

Question 1

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

Accepted Answer

Circuit vent

Answer

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

Question 2

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?

Accepted Answer

All areas of the dwelling unit

Answer

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

Question 3

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

Accepted Answer

1/8 inch per foot

Answer

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

Question 4

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

Accepted Answer

3 inches

Answer

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.

Question 5

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

Accepted Answer

Point where the circuit originates (panel)

Answer

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).

(ICC) International Code Council Certified Professionals Practice Test

(ICC) International Code Council Certified Professionals Practice Test

ICC Mechanical, Plumbing, and Electrical Code Professionals 4