CPD Codes, Regulations, & Standards 2 — Questions and Answers
Question 1: Under the IPC, what is the minimum trap seal depth required for plumbing fixtures?
- 1 inch
- 2 inches (Correct answer)
- 3 inches
- 4 inches
Correct answer: 2 inches
The IPC requires a minimum trap seal depth of 2 inches to prevent sewer gas from entering the building.
Question 2: Which federal regulation governs the maximum flow rate of showerheads manufactured for sale in the United States?
- ASHRAE 90.1
- Energy Policy Act (EPAct) (Correct answer)
- OSHA 29 CFR 1910
- ADA Standards for Accessible Design
Correct answer: Energy Policy Act (EPAct)
The Energy Policy Act (EPAct) of 1992 sets federal maximum flow rates for showerheads at 2.5 GPM.
Question 3: Per ASME A112.19.2, what standard governs vitreous china plumbing fixtures?
- ASME A112.19.2 (Correct answer)
- ASSE 1002
- ASTM F409
- ANSI Z124.1
Correct answer: ASME A112.19.2
ASME A112.19.2 is the standard specifically covering vitreous china plumbing fixtures including sinks and water closets.
Question 4: Which IPC section addresses the required venting of a combination waste and vent system?
- IPC Section 901
- IPC Section 908
- IPC Section 918 (Correct answer)
- IPC Section 924
Correct answer: IPC Section 918
IPC Section 918 covers combination drain and vent systems, specifying sizing and slope requirements.
Question 5: ASSE 1070 establishes performance requirements for which type of device?
- Backflow preventers
- Water temperature limiting devices
- Pressure reducing valves
- Thermostatic mixing valves for individual fixture use (Correct answer)
Correct answer: Thermostatic mixing valves for individual fixture use
ASSE 1070 covers performance requirements for water temperature limiting devices at individual fixtures to prevent scalding.
Question 6: Under ADA Standards, what is the maximum mounting height for the rim of a lavatory in an accessible restroom?
- 30 inches AFF
- 34 inches AFF (Correct answer)
- 36 inches AFF
- 38 inches AFF
Correct answer: 34 inches AFF
ADA Standards require the rim of a lavatory to be mounted no higher than 34 inches above the finished floor.
Question 7: Which organization publishes the National Standard Plumbing Code (NSPC) used primarily in the northeastern United States?
- IAPMO
- PHCC (Correct answer)
- ICC
- AWWA
Correct answer: PHCC
The Plumbing-Heating-Cooling Contractors Association (PHCC) publishes the National Standard Plumbing Code.
CPD Codes, Regulations, & Standards 2
Under the IPC, what is the minimum trap seal depth required for plumbing fixtures?