Chapter 05 2021 UPC

1. The capacity of a residential water heater is __________________.

• a. not regulated by code
• b. required to be a minimum of 40 gallons
• c. required to be a minimum of 50 gallons
• d. based on the “first hour rating” and the number of bedrooms and bathrooms

2. A three-bedroom home with two bathrooms is equipped with a gas storage-type water heater. The minimum capacity for the water heater in accordance with the first hour ratings is _______________.

• a. 38 gallon
• b. 49 gallon
• c. 62 gallon
• d. 74 gallon

3. Combustion air and venting requirements shall be found in ___________________.

• a. this chapter
• b. the building code
• c. the International Mechanical Code
• d. The Fuel Gas Code

4. It shall be unlawful for any person to install, remove, or replace any water heater without first _____________________.

• a. obtaining a plumbing contractor license from the Authority Having Jurisdiction
• b. obtaining a permit from the Authority Having Jurisdiction
• c. having a plumbing journeyman’s license
• d. having permission from the building owner

5. A final water heater inspection shall be made only after

• a. all plumbing fixtures have been installed
• b. all gas appliances have been installed
• c. all work authorized by the permit has been installed
• d. the plumber has left the job

6. A gas water heater installed in a closet in a bathroom shall _____________________________.

• a. be for the exclusive use of the heater
• b. be of the direct vent type
• c. be a minimum of 5 feet by 3 feet
• d. have an exhaust fan interlocked to a CO detector

7. Clearances for listed water heaters shall be

• a. a minimum of 1 inch to combustible construction
• b. a minimum of 2 inches to combustible construction
• c. in accordance with the listing and the manufacturer’s instructions
• d. a minimum of 6 inches to unprotected combustible construction

8. A listed water heater, located in an interior floor level closet, must have an access dimension ____ for removal purposes.

• a. 24”w by 30”h
• b. per manufacturer's instructions
• c. 30” w by 36”h
• d. the size of the water heater

9. Unlisted water heaters shall have a clearance of ________________________

• a. 24" x 24"
• b. 12" on all sides and rear
• c. 24 " on all sides and rear
• d. 6" x 6"

10. Indirect-fired water heaters that incorporate a single-wall heat exchanger shall _____.

• a. have a maximum operating pressure in the heat exchanger not exceeding the maximum operating pressure of the potable water supply.
• b. have a heat-transfer medium of potable water or other nontoxic fluid recognized as safe by the FDA
• c. bear the proper “caution” labels
• d. meet all of these requirements