CBD Safety & Building Code Compliance 2 — Questions and Answers
Question 1: According to the IRC, what is the minimum ceiling height required in a bathroom?
- 6 feet
- 6 feet 8 inches (Correct answer)
- 7 feet
- 7 feet 6 inches
Correct answer: 6 feet 8 inches
The IRC requires a minimum ceiling height of 6 feet 8 inches (2032 mm) in bathrooms, measured at the shower/tub area.
Question 2: Which type of circuit is required by NEC for receptacles installed within 6 feet of a bathroom sink?
- Dedicated 20-amp circuit
- GFCI-protected circuit (Correct answer)
- AFCI-protected circuit
- Standard 15-amp circuit
Correct answer: GFCI-protected circuit
The NEC requires all receptacles within 6 feet of a bathroom sink to be GFCI-protected to prevent electrocution near water.
Question 3: What is the minimum width of a clear floor space required in front of a toilet per ADA accessibility guidelines?
- 24 inches
- 30 inches (Correct answer)
- 36 inches
- 48 inches
Correct answer: 30 inches
ADA guidelines require a minimum 30-inch wide clear floor space in front of a toilet to accommodate wheelchair transfers.
Question 4: Per IRC code, grab bars must be able to support a minimum static load of how many pounds?
- 150 lbs
- 200 lbs
- 250 lbs
- 300 lbs (Correct answer)
Correct answer: 300 lbs
IRC and ADA standards require grab bars to withstand a minimum static load of 250 lbs applied in any direction.
Question 5: Which water temperature is considered the maximum safe setting for a residential bathroom scald prevention?
- 110°F
- 115°F
- 120°F (Correct answer)
- 125°F
Correct answer: 120°F
120°F is the maximum recommended hot water temperature to prevent scalding, and many codes now require pressure-balancing or thermostatic valves.
Question 6: What is the minimum distance a toilet must be placed from a side wall or obstruction per IRC?
- 12 inches
- 15 inches (Correct answer)
- 18 inches
- 24 inches
Correct answer: 15 inches
The IRC requires at least 15 inches from the centerline of the toilet to any side wall or obstruction.
Question 7: Under the IRC, bathroom ventilation must provide a minimum continuous exhaust rate of how many CFM?
- 20 CFM
- 50 CFM (Correct answer)
- 75 CFM
- 100 CFM
Correct answer: 50 CFM
The IRC requires bathroom exhaust fans to provide a minimum of 50 CFM intermittent or 20 CFM continuous ventilation.
CBD Safety & Building Code Compliance 2
According to the IRC, what is the minimum ceiling height required in a bathroom?