Questions with Answers and Detailed Explanations for
Licensing Preparation
SECTION 1: Plumbing Fixtures & General Requirements (IPC Chapter 4)
Question 1 (IPC 425.4)
A 4-inch by 3-inch closet bend shall be acceptable.
A. True
B. False
Correct Answer: A. True
Rationale: IPC 425.4 permits a 4" × 3" closet bend for water closet connections.
Question 2 (IPC 403.1)
What is the minimum number of toilets required in an educational facility men’s room serving
500 occupants?
A. 5
B. 8
C. 10
D. 12
Correct Answer: C. 10
Rationale: IPC Table 403.1 requires 1 water closet per 50 males in educational facilities.
Question 3
, Drinking fountains shall be located on an ______ route.
Correct Answer: accessible
Rationale: Drinking fountains must comply with accessibility standards.
Question 4 (IPC 406.2)
What is the minimum waste connection for an automatic clothes washer?
A. 1 1/2"
B. 2"
C. 2 1/2"
D. 3"
Correct Answer: B. 2"
Rationale: IPC 406.2 requires a 2-inch minimum waste outlet.
Question 5 (IPC 405.3.1)
Water closet compartments (wall-hung) shall be at least:
A. 30" wide and 56" deep
B. 36" wide and 60" deep
C. 30" wide and 60" deep
D. 36" wide and 56" deep
Correct Answer: A. 30" wide and 56" deep
Rationale: IPC specifies minimum clearances for wall-hung units.
Question 6 (IPC 402.1)
Plumbing fixtures shall be constructed of ______ materials.
Correct Answer: approved
Rationale: Only approved materials meeting code standards are permitted.