Chapter 5: Water Heaters

Question 1

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

Answer 1

B) obtaining a permit from the Authority Having Jurisdiction

Question 2

Vent connectors of natural draft appliances __________ be connected to mechanical draft systems operating under positive pressure.

Answer 2

B) shall not

Question 3

A vent connector connected to a chimney flue serving a fireplace is __________

Answer 3

A) prohibited unless the fireplace flue opening is permanently sealed.

Question 4

A draft hood-equipped water heater is vented through an unconditioned area. The portion of the vent passing through the unconditioned area shall __________

Answer 4

C) be listed type B, type L, or listed material having equivalent insulating qualities.

Question 5

The minimum capacity for a storage water heater is __________.

Answer 5

D) based on the “first hour rating” and the number of bedrooms and bathrooms.

Question 6

A water heater installed in a residential garage shall be __________.

Answer 6

B) located or protected from damage by a moving vehicle

Question 7

A final water heater inspection shall be made after __________

Answer 7

C) work authorized by the permit has been installed

Question 8

Water heaters of other than the direct-vent type shall be located __________.

Answer 8

C) as close as practical to the chimney or gas vent.

Question 9

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 __________.

Answer 9

C) 62 gallon

Question 10

Outdoor combustion air shall be supplied by __________.

Answer 10

C) one or two permanent openings

Question 11

Indoor combustion air supplied by using the “standard method” requires a minimum volume of __________.

Answer 11

B) 50 cu ft per 1,000 btu/hr

Question 12

Combustion air ducts shall __________.

Answer 12

A) serve a single space

Question 13

Combustion air ducts that terminate in an attic shall __________.

Answer 13

C) not be screened

Question 14

Draft-hood equipped and other fuel-burning Category I water heaters shall be permitted to be installed in a closet located in the bedroom or a bathroom provided __________.

Answer 14

C) the closet has a listed, gasketed door assembly and a listed self-closing device.

Question 15

Water heaters supported from the earth shall rest on __________.

Answer 15

B) a level concrete or other approved base

Question 16

Where damage may result from a leaking water heater, a watertight pan of corrosion-resistant materials shall be installed underneath the water heater when it is located in an attic or __________.

Answer 16

D) a floor-ceiling assembly

Question 17

Plastic piping may be used to vent a water heater is the water heater is __________.

Answer 17

B) listed for use with that material

Question 18

Special gas vents shall only be installed on a water heater if __________.

Answer 18

C) it is listed and installed per the listing and the manufacturer’s instructions.

Question 19

Water heaters incorporating integral venting means, shall be __________.

Answer 19

A) installed per the manufacturer’s instructions and the referenced code sections.

Question 20

Water heater draft hoods or barometric draft regulators shall be __________.

Answer 20

D) Installed in the same room or enclosure as the water heater.

Question 21

The maximum horizontal length of a 5-inch vent connector for a water heater shall not exceed __________.

Answer 21

C) 7-1/2 feet
(Maximum vent horizontal length shall be 18 inches per inch of connector diameter)

Question 22

Referring to the drawing for a direct vent appliance with an input of 50kbtu or less, the minimum distance at X shall be __________ inches. The minimum distance at Y shall be at least __________ inches.
(A) 12,9 (B) 12,12. (C) 9,12. (D) 9,9

Answer 22

C) 9,12

Question 23

Referring to the drawing, for a direct vent appliance with an input greater than 50,000 btu, the minimum distance from an opening into a building shall be __________ inches. The minimum distance of the bottom of the vent terminal above finish grade shall be __________ inches.
(A) 12,9 (B) 12,12 (C) 9,12. (D) 9,9

Answer 23

B) 12,12

Question 24

A type B vent with a listed cap of 14 inches shall terminate at least __________ higher than any portion of a building within 10 feet.

Answer 24

(B) 2 feet

Question 25

A water heater is installed on the roof of a building more than 15 feet in height. The code requires __________ to the roof unless other means acceptable to the Authority Having Jurisdiction are used.

Answer 25

D) An inside means of access.

Question 26

When using an alternative method of sizing with two vent connectors for draft hood-equipped water heaters, the effective area of the common vent connector or vent manifold and all junction fittings shall not be less than the area of the larger vent connector plus __________ percent of the areas of smaller flue collar outlets.

Answer 26

A) 50

Question 27

Water heaters shall be anchored or strapped to resist horizontal displacement due to earthquake motion. True or false?

Answer 27

True

Question 28

Where utilizing louvers and grills to provide combustion air, and the design and free area are not known, it shall be assumed that wood louvers will have __________ percent free area and metal louvers and grills will have __________ percent free area.

Answer 28

B) 25,75