Water Heaters

Question 2

True or False:

Water heater vents may be covered or concealed prior to inspection.

Answer 2

False

Question 3

True or False:

Water heaters are never permitted to be installed in bedrooms or bathrooms.

Answer 3

False

Question 4

Which of the following is not an approved means for obtaining combustion air for a gas appliance?

a. indoor combustion air
b. reclaimed combustion air
c. outdoor combustion air
d. combination indoor and outdoor combustion air

Answer 4

b. reclaimed combustion air

Question 5

Fill in the blank:

Where exhaust fans, clothes dryers and kitchen ventilation systems interfere with the operation of appliances, ______ shall be provided.

Answer 5

makeup air

Question 6

Fill in the blank:

When calculating the opening for indoor combustion air on the same story, each opening shall be not less than ______ square inches.

Answer 6

100

Question 7

Fill in the blank:

The minimum dimension of air opening for outdoor combustion air shall be not less than ______ inches.

Answer 7

3

Question 8

Fill in the blank:

Outdoor combustion air obtained through the two permanent requires that the two openings be ______ inches from the top and bottom of the enclosure.

Answer 8

12

Question 9

Fill in the blank:

Where all combustion air shall be provided by mechanical air supply system, the air shall be supplied from outdoors at a minimum rate of ______ cubic feet per 1000 BTU/h.

Answer 9

0.35

Question 10

Fill in the blank:

Where the design and free area of a wood louver and grille are not known, it shall be assumed that wood louvers have ______ percent free area for combustion airflow.

Answer 10

25

Question 11

True or False:

Combustion air ducts drawing air from an attic space shall have a screen.

Answer 11

False

Question 12

Fill in the blank:

Seismic straps for water heaters shall be located within the upper and lower ______ of the vertical dimensions of the water heater.

Answer 12

one-third

Question 13

What is the minimum depth for a water heater pan?

Answer 13

1 1/2”

Question 14

True or False:

A natural gas water heater may be installed and connected to an LP-gas system.

Answer 14

False

Question 15

Fill in the blank:

When additional appliances are being connected to an existing gas piping system, the piping shall be ______ .

Answer 15

checked to determine whether it has adequate capacity.

Question 16

Fill in the blank:

Appliances shall be supported and connected to the gas piping ______.

Answer 16

so as to not exert undue strain on connections.

Question 17

Fill in the blank:

When an appliance is installed on a rooftop, at least ______ feet of clearance shall be provided between any part of an appliance and the edge of the roof.

Answer 17

6

Question 18

Fill in the blank:

Buildings that are more than ______ feet high shall have an inside means of access to the roof.

Answer 18

15

Question 19

Fill in the blank:

Where rooftop access or roof appliances are less than 6 feet from the edge of the roof, a guardrail that is at least ______ inches high shall be installed.

Answer 19

42”

Question 20

Fill in the blank:

Passageways leading to appliances in an attic or under the floor shall not exceed ______ feet in length.

Answer 20

20

Question 21

Fill in the blank:

Gas appliances that require ______ (Btu/hr) / cubic foot of room space shall be provided with a venting system for conveying gasses to the outdoors.

Answer 21

20

Question 22

Fill in the blank:

Venting systems shall be designed and constructed to convey ______ flue and vent gasses to the outdoors.

Answer 22

all

Question 23

Fill in the blank:

Exit terminals for mechanical draft vented appliances shall be not less than ______ feet above ground level where located adjacent to public walkways.

Answer 23

7

Question 24

True or False:

Where plastic pipes and fittings are installed for appliance venting, clear primer is permitted to be used.

Answer 24

False

Question 25

Fill in the blank:

A chimney for residential type gas appliances shall extend at least ______ feet above the highest point where it passes through a roof of a building.

Answer 25

3

Question 26

# True or False: A gas appliance vent shall be permitted to be connected to a chimney serving an appliance designed to burn solid fuel.

Answer 26

False

Question 27

# Fill in the blank: A vent terminal for a gas appliance passing through a roof with a slope over 8/12 to 9/12 shall have a minimum height above the roof of \_\_\_\_\_\_ feet.

Answer 27

2

Question 28

# Fill in the blank: A vent terminal for a gas appliance passing through a roof with a slope over 11/12 to 12/12 shall have a minimum height above the roof of \_\_\_\_\_\_ feet.

Answer 28

4

Question 29

# Fill in the blank: A vent terminal for a gas appliance passing through a roof with a slope over 7/12 to 8/12 shall have a minimum height above the roof of \_\_\_\_\_\_ feet.

Answer 29

1.5

Question 30

# Fill in the blank: The total horizontal distance for a Type B vent shall not be greater than \_\_\_\_\_\_ percent of the vertical height.

Answer 30

7552

Question 31

# True or False: Uninsulated single-wall metal pipe shall be permitted to be used outdoors for venting appliances in regions where the 99 percent winter design temperature is below 32 degrees F.

Answer 31

False

Question 32

# Fill in the blank: A mechanical draft venting system of other than direct-vent type terminating through-the-wall shall be at least \_\_\_\_\_\_ feet below any door, openable window, or gravity air inlet into the building.

Answer 32

4

Question 33

# Fill in the blank: The bottom of a direct-vent terminal and air intake terminating through the-wall shall be located not less than \_\_\_\_\_\_ above finished ground level.

Answer 33

12 inches

Question 34

# Fill in the blank: Where two or more appliances are connected to a single vent, the openings for each vent shall be \_\_\_\_\_\_.

Answer 34

at different levels

Question 35

Which of the following fastening methods is not listed for joints between sections of appliance vent connector piping? a. sheet metal screws b. duct tape c. other approved means. d. vent connectors assembled and connected in accordance with manufacturer's instructions

Answer 35

b. duct tape

Question 36

# Fill in the blank: The entire length of a vent connector shall be \_\_\_\_\_\_ for inspection, cleaning and replacement.

Answer 36

readily accessible

Question 37

# Fill in the blank: Single-appliance gas venting with lateral lengths include the use of \_\_\_\_\_\_ 90-degree elbows.

Answer 37

2

Question 38

When a draft vent serves multiple appliances, what is the maximum horizontal length for a vent connector that is 6 inches in diameter?

Answer 38

9"

Question 39

When multiple appliance vent connectors are combined before entering the vent, the capacity of the vent shall be reduced by what percentage?

Answer 39

10%

Question 40

# Fill in the blank: Where a common draft vent is used to vent appliances on multistory installations, \_\_\_\_\_\_ shall be installed with a listed vent cap.

Answer 40

Type B Double Wall

Question 41

# Fill in the blank: Draft vent connectors for multiple appliances shall not be increased more than \_\_\_\_\_\_ greater than the listed appliance categorized vent diameter or draft hood outlet diameter.

Answer 41

two sizes

Question 42

# Fill in the blank: A seismic strap for a water heater shall be at least \_\_\_\_\_\_ inches away from the controls.

Answer 42

4

Question 43

# Fill in the blank: Gas appliances installed in residential garages shall be installed so that the ignition for the burner is not less than \_\_\_\_\_\_ inches above the floor.

Answer 43

18

Question 44

# Fill in the blank: The passageway leading to appliances in an attic or under the floor shall have a solid flooring not less than \_\_\_\_\_\_ inches wide.

Answer 44

24

Question 45

What is the required single-wall metal vent connector diameter given the following information? Type B Double-Wall Gas Vent Two or More Appliances Category 1 Appliances With Single-Wall Metal Connector Vent Height: 20' Connector Rise: 1' Natural Draft Appliance Input 80,000 BTU

Answer 45

4" pipe

Question 46

What is the required common vent diameter given the following information? Type B Double-Wall Gas Vent Two or More Connectors Category 1 Appliances With Type B Double-Wall Connector Vent Height: 30' one appliance is Fan Assist and the other is Natural Draft Combined Appliances Input 130,000 BTU

Answer 46

4" pipe