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Uniform Plumbing Code (UPC) > Ch 5 - Water Heaters > Flashcards

Ch 5 - Water Heaters Flashcards

1
Q

True or False

A permit is required to install, remove, or replace any water heater.

A

TRUE

It shall be unlawful for a person to install, remove, or replace or cause to be installed, removed, or replaced a water heater without first obtaining a permit from the Authority Having Jurisdiction to do so.

2024 UPC- 502.0 Permits. 2024 UPC- 502.1 General.

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2
Q

Fill in the blank

Water heaters installations in bedrooms and bathrooms shall be of the _____ type.

A

Direct-vent

(1) Water heater shall be of the direct vent type [NFPA 54:10.27.1(2)] (NFPA 54: National Fuel Gas Code)

2024 UPC- 504.0 Water Heater Requirements. 2024 UPC- 504.1 Location.

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3
Q

Fill in the blank

Fuel-burning water heaters are permitted to be installed in a closet located in the _____.

A

Bedroom or bathroom

(2) Fuel-burning water heaters shall be permitted to be installed in a closet located in the bedroom or bathroom provided the closet is equipped with a listed, gasketed door assembly and a listed self-closing device. The self-closing door assembly shall meet the requirements of Section 504.1.1. The door assembly shall be installed with a threshold and bottom door seal and shall meet the requirements of Section 504.1.2. Combustion air for such installations shall be obtained from the outdoors in accordance with Section 506.4. The closet shall be for the exclusive use of the water heater.

2024 UPC- 504.0 Water Heater Requirements. 2024 UPC- 504.1 Location.

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4
Q

Fill in the blank

Gasketing on gasketed doors or frames must be furnished according to the published listings of the _____.

A

Door, frame, or gasketing material manufacturer

Gasketing on gasketed doors or frames shall be furnished in accordance with the published listings of the door, frame, or gasketing material manufacturer.

2024 UPC- 504.1.2 Gasketing

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5
Q

Fill in the blank

Unlisted water heaters must be installed with a clearance of _____ on all sides and the rear.

A

12 inches

Except as otherwise permitted in this code, unlisted water heaters shall be approved by the Authority Having Jurisdiction prior to being installed. Clearance for unlisted water heaters shall be not less than 12 inches (305 mm) on all sides. Combustible floors under unlisted water heaters shall be protected in an approved manner. {NFPA 54-2018:10.27.2.2} (NFPA 54: National Fuel Gas Code)

2024 UPC- 504.3.2 Unlisted Water Heaters.

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6
Q

Fill in the blank

Gas appliances of other than natural draft design and other than Category I vented appliances shall be provided with _____, ventilation, and dilution air in accordance with the appliance manufacturer’s instructions.

A

Combustion

Appliances of other than natural draft design appliances not designated as Category I vented appliances, and appliances equipped with power burners shall be provided with combustion, ventilation, and dilution air in accordance with the appliance manufacturer’s instructions. [NFPA 54:9.3.1.2] (NFPA 54: National Fuel Gas Code)

2024 UPC- 506.1.1 Other Types of Appliances.

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7
Q

True or False

True or False: Where exhaust fans, clothes dryers and kitchen ventilation systems interfere with the operation of appliances, makeup air must be provided.

A

TRUE

Where exhaust fans, clothes dryers, and kitchen ventilation systems interfere with the operation of appliances, makeup air shall be provided. [NFPA 54:9.3.1.5] (NFPA 54: National Fuel Gas Code)

2024 UPC- 506.1.3 Makeup Air.

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8
Q

Fill in the blank

The minimum required combustion air volume shall be _____ cubic feet per 1000 BTU/hour.

A

50 cu. Ft.

The required volume shall be not less than 50 cubic feet per 1000 British thermal units per hour (Btu/hr) (4.83 m3/kW). [NFPA 54:9.3.2.1] (NFPA 54: National Fuel Gas Code)

2024 UPC- 506.2.1 Standard Method

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9
Q

Fill in the blank

Required combustion air ducts shall not be less than _____ inches in the least dimension.

A

3 inches

(1) Combining spaces on the same story. Each opening shall have a minimum free area of 1 square inch per 1000 Btu/h (0.002 m2/kW) of the total input rating of all appliances in the space but not less than 100 square inches (0.065 m2). One permanent opening shall commence within 12 inches (305 mm) of the top of the enclosure and one permanent opening shall commence within 12 inches (305 mm) of the bottom of the enclosure (see Figure 506.3). The minimum dimension of air openings shall not be less than 3 inches (76 mm).

2024 UPC- 506.3 Indoor Opening Size and Location.

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10
Q

Fill in the blank

Openings shall be located so that one combustion air opening extends within the upper _____ inches of the appliance enclosure.

A

12 inches

Two permanent openings, one commencing within 12 inches (305 mm) of the top of the enclosure and one commencing within 12 inches (305 mm) of the bottom of the enclosure, shall be provided.

2024 UPC- 506.4.1 Two Permanent Opening Method

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11
Q

Fill in the blank

Openings shall be located so that one combustion air opening extends within the lower _____ inches of the appliance enclosure.

A

12 inches

Two permanent openings, one commencing within 12 inches (305 mm) of the top of the enclosure and one commencing within 12 inches (305 mm) of the bottom of the enclosure, shall be provided.

2024 UPC- 506.4.1 Two Permanent Opening Method

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12
Q

Which of the following should supply outdoor combustion air?

A

One or two permanent openings.

Two permanent openings, one commencing within 12 inches (305 mm) of the top of the enclosure and one commencing within 12 inches (305 mm) of the bottom of the enclosure, shall be provided.

2024 UPC- 506.4.1 Two Permanent Openings Method.

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13
Q

Fill in the blank

Where the design and free area are not known, it shall be assumed that wood louvers will have _____ percent free area.

A

25 percent

The required size of openings for combustion, ventilation, and dilution air shall be based on the net free area of each opening. Where the free area through a design of louver, grille, or screen is known, it shall be used in calculating the size opening required to provide the free area specified. Where the louver and grille design and free area are not known, it shall be assumed that wood louvers have 25 percent free area and metal louvers and grilles have 75 percent free area. Nonmotorized louvers and grilles shall be fixed in the open position. [NFPA 54:9.3.7.1] (NFPA 54: National Fuel Gas Code)

2024 UPC- 506.8 Louvers, Grilles, and Screens.

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14
Q

Fill in the blank

Where the design and free area are not known, it shall be assumed that metal louvers and grilles will have _____ percent free area.

A

75 percent

The required size of openings for combustion, ventilation, and dilution air shall be based on the net free area of each opening. Where the free area through a design of louver, grille, or screen is known, it shall be used in calculating the size opening required to provide the free area specified. Where the louver and grille design and free area are not known, it shall be assumed that wood louvers have 25 percent free area and metal louvers and grilles have 75 percent free area. Nonmotorized louvers and grilles shall be fixed in the open position. [NFPA 54:9.3.7.1] (NFPA 54: National Fuel Gas Code)

2024 UPC- 506.8 Louvers, Grilles, and Screens.

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15
Q

Fill in the blank

Water heaters may be installed in a garage, provided all burners and burner-ignition devices are at least _____ inches above the floor.

A

18 inches

Appliances in residential garages and in adjacent spaces that open to the garage and are not part of the living space of a dwelling unit shall be installed so that all heating elements, switches, burners, and burner-ignition devices are located not less than 18 inches (457 mm) above the floor.

2024 UPC- 507.13 Installation in Residential Garages.

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16
Q

Fill in the blank

Water heaters in garages shall be located or protected so it is not subject to _____ by a moving vehicle.

A

Physical damage

Appliances installed in garages, warehouses, or other areas subject to mechanical damage shall be guarded against such damage by being installed behind protective barriers or by being elevated or located out of the normal path of vehicles.

2024 UPC- 507.13.1 Physical Damage.

17
Q

What is the minimum clearance in front of water heater service panels mounted in an enclosure on the roof?

A

30 inches

Appliances on roofs shall be designed or enclosed so as to withstand climatic conditions in the area in which they are installed. Where enclosures are provided, each enclosure shall permit easy entry and movement, shall be of reasonable height, and shall have at least a 30 inch (762 mm) clearance between the entire service access panel(s) of the appliance, and the wall of the enclosure. [NFPA 54:9.4.1.1] (NFPA 54: National Fuel Gas Code)

2024 UPC- 508.0 Appliances on Roofs, in Attics or Under-Floor Spaces. 2024 UPC- 508.1 General.

18
Q

Fill in the blank

Access to a water heater, on the roof, by a trap door, shall not be less than _____ inches.

A

22 inches x 24 inches.

The inside means of access shall be a permanent or fold away inside stairway or ladder, terminating in an enclosure, scuttle, or trap door. Such scuttles or trap doors shall be at least 22 inches by 24 inches (559 mm by 610 mm) in size, shall open easily and safely under all conditions, especially snow; and shall be constructed so as to permit access from the roof side unless deliberately locked on the inside.

2024 UPC- 508.3.2 Access Type.

19
Q

Fill in the blank

Attic and underfloor water heater locations shall be provided with an _____ outlet at or near the water heater.

A

Electric outlet

A permanent 120 V receptacle outlet and a luminaire shall be installed near the appliance. The switch controlling the luminaire shall be located at the entrance to the passageway. [NFPA 54:9.5.3] (NFPA 54: National Fuel Gas Code)

2024 UPC- 508.4.4 Lighting and Convenience Outlet.

20
Q

Fill in the blank

Attic and underfloor water heater locations shall be provided with an _____ at or near the water heater.

A

Lighting fixture

A permanent 120 V receptacle outlet and a luminaire shall be installed near the appliance. The switch controlling the luminaire shall be located at the entrance to the passageway. [NFPA 54:9.5.3] (NFPA 54: National Fuel Gas Code)

2024 UPC- 508.4.4 Lighting and Convenience Outlet.

21
Q

Fill in the blank

Water heaters may be vented by means of a mechanical draft system of _____ draft design.

A

Either forced or induced

Appliances requiring venting shall be permitted to be vented by means of mechanical draft systems of either forced or induced draft design. [NFPA 54:12.4.3.2] (NFPA 54: National Fuel Gas Code)

2024 UPC- 509.3.3.1 Venting.

22
Q

Fill in the blank

Forced draft systems shall be designed and constructed so as to develop a _____ flow adequate to remove flue or vent gases to the outside atmosphere.

A

Positive

Forced draft systems and all portions of induced draft systems under positive pressure during operation shall be designed and installed so as to prevent leakage of the flue or vent gases into a building. [NFPA 54:12.4.3.3] (NFPA 54: National Fuel Gas Code)

2024 UPC- 509.3.3.2 Leakage.

23
Q

Fill in the blank

A Type B-W gas vent shall terminate at least _____ feet in vertical height above the bottom of the wall furnace.

A

12 feet

(2) A Type B-W gas vent shall terminate at least 12 feet (3658 mm) in vertical height above the bottom of the wall furnace. [NFPA 54:12.7.2(3)] (NFPA 54: National Fuel Gas Code)

2024 UPC- 509.6 Gas Vents.

24
Q

Fill in the blank

A manually operated _____ shall not be placed in any equipment vent connector.

A

Damper

A manually operated damper shall not be placed in any appliance vent connector. Fixed baffles and balancing baffles shall not be classified as manually operated dampers. Balancing baffles shall be mechanically locked in the desired position before placing the appliance in service. Balancing baffles shall be listed in accordance with UL 378. [NFPA 54:12.14.1 - 12.14.3] (NFPA 54: National Fuel Gas Code)

2024 UPC- 509.13 Manually Operated Dampers.

25
Q

Fill in the blank

For each elbow up to and including _____ degrees in the common vent, the maximum common vent capacity listed in the venting tables shall be reduced by 5 percent.

A

45 degrees

The vent connector capacities listed in the common vent sizing tables include allowance for two 90 degree (1.57 rad) elbows. For each additional elbow up to and including 45 degrees (0.79 rad), the maximum vent connector capacity listed in the venting tables shall be reduced by 5 percent. For each elbow greater than 45 degrees (0.79 rad) up to and including 90 degrees (1.57 rad), the maximum vent connector capacity listed in the venting tables shall be reduced by 10 percent. [NFPA 54:13.2.7] (NFPA 54: National Fuel Gas Code)

2024 UPC- 510.2.6 Elbows in Connectors.

26
Q

Fill in the blank

For each elbow greater than 45 degrees up to and including 90 degrees, the maximum common vent capacity listed in the venting tables shall be reduced by _____ percent.

A

10 percent

The vent connector capacities listed in the common vent sizing tables include allowance for two 90 degree (1.57 rad) elbows. For each additional elbow up to and including 45 degrees (0.79 rad), the maximum vent connector capacity listed in the venting tables shall be reduced by 5 percent. For each elbow greater than 45 degrees (0.79 rad) up to and including 90 degrees (1.57 rad), the maximum vent connector capacity listed in the venting tables shall be reduced by 10 percent. [NFPA 54:13.2.7] (NFPA 54: National Fuel Gas Code)

2024 UPC- 510.2.6 Elbows in Connectors.

27
Q

Fill in the blank

Offsets in multistory common vent system shall not exceed _____ degrees from vertical.

A

45 degrees

(1) The offset shall not exceed 45 degrees (0.79 rad) from vertical.

2024 UPC- 510.2.16 Multistory Vent Offsets and Capacity.

Uniform Plumbing Code (UPC) (17 decks)

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