Minnesota Fuel Gas Code Flashcards
Unless otherwise approved in accordance with Section 105, appliances regulated by this code shall be?
listed and labeled
FG 301.7
Unlisted appliances may be approved based upon what?
an approved engineering evaluation
FG 301.7
For a label affixed to a listed fuel gas appliance, which of the following is not required information?
A. the appliance Btu/hr rating
B. if the appliance is rated for 120 or 220 volt alternating current
C. the approved fuel
D. the minimum required clearances
B. if the appliance is rated for 120 or 220 volt alternating current
FG 301.5
Combustion air requirements for appliances with power burners are determined by what?
the manufacturer’s instructions
FG 304.1
Conversion of an appliances to a different fuel gas is allowed if in accordance with what?
the manufacturer’s instructions
FG 301.7.1
Appliances in structures located in flood hazard areas shall be located at or above the what?
elevation required by the IBC
FG 301.11
Notching at the ends of wood joists shall not exceed _____ the joist depth.
1/4
FG 302.3.2
Cuts, notches and bored holes are prohibited in trusses except where the effects are what?
specifically considered in the design
FG 302.3.1
In bearing partitions, any wood stud is permitted to be cut or notched to a depth not exceeding ______ percent of its width.
25 percent
FG 302.3.3
Notches in the flange of a cold-formed steel stud in a bearing wall are?
not allowed
FG 302.6
Appliances shall not be installed in a location subject to vehicle damage except?
where protected by approved means
FG 303.4
Where used, draft hoods and draft barometric regulators shall be installed in the what?
same room as the appliance
FG 304.3
Where mechanical exhaust interferes with the operation of an appliance, what is required?
makeup air
FG 304.4
Where the air-infiltration rate is unknown, a room or space providing indoor combustion air requires a minimum volume of ______ cubic feet per 1,000 Btu/hr of the appliance input rating.
50
FG 304.5.1
When using the known air infiltration rate method for indoor combustion air, the maximum infiltration rate that can be used in the equation is what?
0.60 ACH
FG 304.5.2
Holes bored in solid wood joists shall be located not less than ______ inches from the top and bottom joist.
2 inches
FG 302.3.2
Openings obtaining indoor combustion air from a different story require a total minimum free area of ____ square inches per 1,000 Btu/hr of the total input rating of appliances.
2 square inches
FG 304.5.3.2
The minimum dimension of an outdoor combustion air opening is what?
3 inches
FG 304.7.3 #3
Where a space is provided outdoor combustion air through a single opening, a clearance of at least _____ inches is required in front of the appliance.
6 inches
FG 304.6.2
A mechanical combustion air system shall supply outdoor air at a rate not less than _______ cfm per 1,000 Btu/hr of total input rating of all appliances located within the space.
0.35 cfm
FG 304.9
Where a screen is installed at a combustion air opening, the mesh size shall not be smaller than what?
1/4 inch
FG 304.10
Equipment and appliances having an ignition source shall _______ _____ ___________ in Group H occupancies or control areas where open use, handling or dispensing of combustible, flammable or explosive materials occurs.
not be installed
FG 305.2
Appliances having an ignition source shall be elevated such that the ignition source is not less than ______ inches above the floor in a private garage.
18 inches
FG 305.3
Where vehicles are capable of passing under an appliance installed in a public garage, the appliance shall be installed a minimum of _____ inches higher than the tallest vehicle garage door opening.
12 inches
FG 305.4
Unless otherwise protected from impact, appliances located in a public garage shall be installed a minimum of ____ feet above the floor.
8 feet
FG 305.4
Unless otherwise protected from impact, appliances located in a private garage shall be installed a minimum of _____ feet above the floor.
6 feet
FG 305.5
Where the opening dimensions are large enough to allow removal of the largest pieces of equipment installed in an under-floor space, the clear access opening to the under-floor area shall be a minimum of what?
22 inches by 30 inches
FG 306.4
Guards are not required for rooftop appliances requiring service where what is installed?
approved fall-restraint devices are installed
FG 306.6 See Exception
Suspended mechanical equipment shall be installed a minimum of _____ inches above the adjoining grade.
6 inches
FG 305.7
Unless located within a dwelling unit, rooms containing appliances shall be provided with a door and an unobstructed passageway measuring not less than _____ inches wide and 80 inches high.
36 inches wide
FG 306.2
Appliances located in an attic shall be provided with a level service space not less than ______ inches deep and ______ inches wide.
30 inches deep
30 inches wide
FG 306.3
A 30 inch high attic passageway serving a gas appliance is limited in length to no more than what?
20 feet
FG 306.3
Where an appliance is located in an attic, a what is required at the access opening to the attic passageway?
a light switch
FG 306.3.1
A permanent approved means of access is required for appliances installed on roofs at a height exceeding what?
16 feet
FG 306.5 See Exception
Required guards installed around rooftop service platforms shall be not less than ______ inches in height.
42 inches
FG 306.6
Condensate waste and drain lines shall be not less than _____-inch internal diameter.
3/4-inch
FG 307.3
Condensate piping for fuel burning condensing appliances shall maintain a minimum horizontal slope of ______ units vertical in 12 units horizontal.
1/8 units vertical
FG 307.2
Where appliances are supported by a concrete slab, the slab shall extend at least _____ inches above the adjoining grade.
3 inches
FG 305.7
Where a reduction in clearance to combustible material is permitted, the side clearance for an appliance is permitted to be reduced from 12 inches to a minimum of _____ inches by installing No. 24 gage galvanized sheet metal with a ventilated air space.
4 inches
FG Table 308.2
For a clearance reduction system using ventilated air space, the system shall maintain an air space clearance to combustible materials of at least what?
1 inch
FG Table 308.2 Exception e
Reduced clearance protective assemblies for gas appliances shall be placed a minimum of _____ inch from the appliance.
1 inch
FG Table 308.2 Exception i
The bonding jumper used to bond corrugated stainless steel tubing (CSST) gas piping to the grounding system shall not be smaller than _____ AWG copper wire or equivalent.
6 AWG
FG 310.2.2
The maximum length of an electrical bonding jumper for a corrugated stainless steel tubing (CSST) system is what?
75 feet
FG 310.2.3
For other than steel piping, exposed gas piping must be identified by a yellow label marked “Gas” in black letters and the markings spaced at intervals not exceeding what?
5 feet
FG 401.5
Where there are multiple meters, the __________ must mark the piping system supplied by each meter with an approved permanent identification.
installer
FG 401.7
The volume of gas to be provided must be determined directly from the ________ __________ of the appliance served.
input rating
FG 402.2
Gas piping is permitted to be sized in accordance with the sizing tables in the piping system’s what?
piping system manufacturer
FG 402.3 #2
Using the longest length method for sizing gas piping, each section of piping is measured from what to what?
the point of delivery to the most remote outlet
FG 402.4.1
A gas piping system located inside an ____________ building is limited to a maximum design operating pressure of 5 pounds per square inch gage (psig).
A. institutional
B. industrial
C. warehouse
D. research
A. institutional
FG 402.7 Exception #4
Used pipe, fittings, valves and other materials must not be used in a gas piping system except where they are free of what?
foreign material
FG 403.2
Copper and copper alloy gas piping is permitted to be installed when the gas contains no more than an average of _______ grains of hydrogen sulfide per 100 standard cubic feet of gas.
0.3 grains
FG 403.4.3
Field drilled and tapped pipe fittings are permitted under limited conditions when the work is performed by whom?
the gas supplier
FG 403.10.5 #9.3
For steel gas piping, threaded fittings larger than _____ inches are not permitted.
4 inches
FG 403.10.5 #1
Gas piping must not be installed in or through a what?
A. plenum
B. clothes chute
C. attic
D. enclosed space
B. clothes chute
FG 404.3
What piping is not allowed for supplying fuel gas?
A. aluminum
B. copper alloy
C. CPVC
D. polyethylene
C. CPVC
FG 403.6
Gas piping must not enter a building through where?
underground
FG 404.6
Where gas piping is required to be installed in conduit and one end terminates outdoors, the conduit must extend not less than _____ inches outside the building.
4 inches
FG 404.8.1
A required conduit containing gas piping must extend not less than _____ inches beyond the point where the pipe emerges from the floor in the building.
2 inches
FG 404.8.1
Exterior above-ground gas piping must be elevated not less than _____ inches above ground and roof surfaces.
3 1/2 inches
FG 404.9
In general, underground gas piping systems must be installed at a minimum depth of ______ inches below grade.
12 inches
FG 404.12
The unthreaded portion of gas piping outlets must extend not less than _____ inch(es) through finished ceilings and walls.
1 inch
FG 404.16
Plastic gas pipe is generally permitted to be installed where?
outdoors underground only
FG 404.17
Underground nonmetallic gas piping requires a yellow insulated copper tracer wire not less than what size?
18 AWG
FG 404.17.3
The following threaded fittings for steel gas piping are allowed in concealed locations except?
A. couplings
B. tees
C. unions
D. elbows
C. unions
FG 404.5
The test pressure must be not less than ______ times the proposed maximum working pressure of the gas piping system.
1 1/2 times
FG 406.4.1
Where steel shield plates are required to protect concealed gas piping installed through holes in wood studs, the shield plates must extend a minimum of _____ inches to each side of the stud.
4 inches
FG 404.7.1
Supports for 1-inch steel gas piping shall be spaced no more than _____ feet apart.
8 feet
FG Table 415.1
Gas piping supports for 1/2-inch copper tubing shall be spaced no more than _____ feet apart.
4 feet
FG Table 415.1
Unless incorporated as part of the appliance, a sediment trap shall be installed where?
downstream of the appliance shut off valve
FG 408.4
Sediment traps are not required for what?
A. ranges
B. water heaters
C. boilers
D. forced air furnaces
A. ranges
FG 408.4
The installation of shutoff valves shall be prohibited where?
in concealed locations and furnace plenums
FG 409.1.2
Where a single meter is used to supply gas to more than one building, a shutoff valve shall be provided where?
outdoors at each building
FG 409.3.2
A gas shutoff valve shall be located within _____ feet of the appliance.
6 feet
FG 409.5.1
When installing a gas shut off valve for an appliance, the shut off valve shall be located where?
upstream of the union
FG 409.5.1
A listed outdoor gas hose used to connect a portable outdoor appliance to the gas piping system must comply with what standard?
ANSI Z21.75
FG 411.1 #8
A shutoff valve for a _______ ____________ ___________ is permitted to be located in an area remote from the appliance.
vented decorative appliance
FG 409.5.2
The vent pipe for pressure regulators shall be designed to prevent the entry of what?
water and foreign objects
FG 410.3
The appliance shutoff valve is permitted to be installed at a manifold that is not greater than ______ feet from the appliance.
50 feet
FG 409.5.3
Semirigid metallic tubing used to connect a gas appliance shall not exceed _____ feet in length.
6 feet
FG 411.1 #3
Appliance shutoff valves located at a manifold are not required to be what?
A. readily accessible
B. in the same room as the appliance
C. identified
D. protected from damage
B. in the same room as the appliance (within 50 feet)
FG 409.5.3
A dedicated gas shut off valve must be located adjacent to the egress door of a laboratory having _____ or more fuel gas outlets.
2 or more
FG 409.6
A vent to the outdoors is not required for a pressure regulator equipped with a what?
vent-limiting device
FG 410.3 See Exception
A union must be installed not more than ______ inches from an MP regulator that is connected to rigid piping.
12 inches
FG 410.2 #7
Fuel gas piping for other than dry gas conditions shall be sloped not less than _____ inch in 15 feet to prevent traps.
1/4 inch
FG 408.1
When a union is provided for an appliance connected to rigid metallic pip, the union shall be accessible and located within ______ feet of the appliance.
6 feet
FG 411.1.6
In LP-gas motor vehicle fuel-dispensing facilities that are self-service require an emergency shutoff switch located a maximum of ______ feet from the dispenser.
100 feet
FG 412.9 #2
In LP-gas motor vehicle fuel-dispensing facilities, the hose length shall not exceed what?
18 feet
FG 412.8.2
Unless located in a vault, compressed natural gas storage and dispensing equipment is not permitted to be installed less than?
A. 10 feet from an ignition source
B. 15 feet from a building
C. 25 feet from a property line
D. 50 feet from a public street
A. 10 feet from an ignition source
FG 413.3.1
For appliances designed to operate at 14 inches w.c. or less, overpressure protection devices are required only if the service supply pressure exceeds what?
2 psi
FG 416.1
Where a residential compressed natural gas (CNG) fueling appliance is located indoors, a methane gas detector shall be located no lower than _____ inches from the highest point of the room or space.
6 inches
FG 413.4.3 #3
The maximum distance that is allowed between hangers supporting horizontal 1 1/4 inch nominal diameter rigid steel pipe used to supply natural gas to an appliance is what?
10 feet
FG Table 415.1
Masonry chimneys shall be constructed in accordance with the what?
International Building Code
FG 501.3
Factory-built chimneys and vents for solid fuel appliances are regulated by the what?
International Mechanical Code
FG 501.1
For a direct-vent fireplace with a sidewall vent, the vent termination must be a minimum of _____ inches from the swing of a door.
12 inches
FG 502.7.1
Gas appliance connections to a masonry chimney flue must be at a point not less than _____ inches above the lowest portion of the interior of the chimney flue.
12 inches
FG 501.9
Appliance connections to a chimney or vent equipped with a power exhauster shall be made on the _________ side of the exhauster.
inlet
FG 501.10
Masonry chimney flues shall be provided with a cleanout opening having a minimum height of what?
6 inches
FG 501.15.3
For vents passing through an attic, the attic insulation shield shall extend at least _____ inches above the insulation material.
2 inches
FG 502.4
To protect vents in a concealed location from physical damage. steel shield plates shall have a minimum thickness of what?
No. 16 gage
FG 502.7
Vents passing through insulated assemblies require an insulation shield constructed of steel with a minimum thickness of what?
0.0187 (No. 26 gage)
FG 502.4
When a mechanical draft system serving an appliance is not performing, gas shall not?
gas shall not flow the main burners
FG 503.3.3 #5
For mechanical draft systems, exit terminals located adjacent to public walkways shall not be less than ______ feet above finished ground level.
7 feet
FG 503.3.3 #6
Termination for chimneys serving residential type or low heat appliances shall extend at least _____ feet above the highest point where they pass through the roof of a building.
3 feet
FG 503.5.4
Chimneys serving medium heat appliances shall extend at least 10 feet higher than any portion of any building within how many feet?
25 feet
FG 503.5.4
A 12 inch diameter listed gas vent with a listed cap is located 9 feet from a vertical wall. The gas vent is being terminated outside a building that has a roof slope of 12/12. What is the minimum termination distance above the roof?
4.0 feet
FG Figure 503.6.5
Where required to protect vents from physical damage, protective shield plates shall extend a minimum of ______ inches above sole plates and below top plates.
4 inches
FG 502.7
A type L vent is permitted for what?
listed combination gas and oil-burning appliances
FG Table 503.4
A type B or L vent shall terminate at least _____ feet in vertical height above the highest appliance draft hood or flue collar.
5 feet
FG 503.6.6
On a roof with a 4/12 slope, an 8-inch type B vent located 12 feet from a vertical wall shall terminate a minimum of ______ inches above the roof.
12 inches
FG Figure 503.6.5
Gas vents shall terminate not less than 3 feet above any forced air inlet located within what?
10 feet
FG 503.6.8
Gas vents terminating less than 8 feet from a vertical wall shall terminate not less than ______ feet above any portion of a building within 10 feet.
2 feet
FG 503.6.5 #2
Decorative shrouds for gas vents shall be listed for what?
for the specific gas venting system
FG 503.6.5.1
A common gas vent serving appliances on more than one floor level shall be permitted for _____________ appliances provided that the venting system is designed and installed in accordance with approved engineering methods.
Category I
FG 503.6.11
Gas vents shall be supported in accordance with what?
the manufacturer’s installation instructions
FG 503.6.12
A single wall metal pipe vent shall terminate at least ______ inches higher than any portion of a building within 10 feet.
24 inches
FG 503.7.3
Where double wall vents are installed, fasteners shall not what?
not penetrate the inner wall
FG 503.6.14
Single wall metal pipe vent shall be constructed of galvanized sheet steel not less than how thick?
0.0304 inch
FG 503.7.1
For single wall metal pipe to be used outdoors for venting appliances, the 99 percent winter design temperature must not be less than ______ degrees F.
32 degrees F
FG 503.7.2
A single wall metal pipe vent shall terminate at least _____ feet in vertical height above the highest appliance draft hood outlet.
5 feet
FG 503.7.3
When terminating above a roof, a single wall metal pipe vent shall extend at least _____ feet above the highest point where it passes through the roof.
2 feet
FG 503.7.3
Where a single wall metal pipe vent passes through a roof constructed of combustible material, a noncombustible, non-ventilating thimble shall extend at least _______ inches above and 6 inches below the roof.
18 inches
FG 503.7.5
Single-wall metal pipe vent is permitted to pass through an ___________ ________ constructed of combustible materials.
exterior wall
FG 503.7.6
A mechanical draft venting system terminates through an exterior wall directly above an operable window. The vent termination must be located a minimum of _____ foot above the window.
1 foot
FG 503.8 #2
The vent terminal of a direct-vent appliance with an input of 20,000 Btu/hr shall be located at least _____ inches from any air opening into a building.
9 inches
FG Table 503.8
In general, a vent connector for a Category I appliance shall slope upward toward the chimney or vent at least _____ inch per foot.
1/4 inch
FG 503.10.7
The horizontal length of a single-wall connector shall be not greater than ______ percent of the height of the vent or chimney.
75 percent
FG 503.10.8
The horizontal length of a Type B double-wall connector shall be not greater than ______ percent of the height of the vent or chimney.
100 percent
FG 503.10.8
The minimum thickness required for a 16 inch diameter steel vent connector with an internal area of 190 square inches serving a medium heat appliance is what?
0.067 inch
FG Table 503.10.2.5
Barometric draft regulators shall be installed in a manner to prevent any difference in pressure between the regulator and the ____________ air supply.
combustion air
FG 503.12.5
For a residential furnace with a listed gas conversion burner and draft hood, a single wall metal pipe connector requires a minimum clearance of _____ inches to combustible materials.
9 inches
FG Table 503.10.5
Generally, the relief opening of a draft hood shall be located a minimum of _____ inches from any surface.
6 inches
FG 503.12.7
Vent connectors shall not be increased in size more than _____ sizes greater than the draft hood outlet.
2 sizes
FG 504.2.11
For a connector with two 90 degree elbows and two 45 degree elbows, the maximum capacity of the vent connector shall be reduced by _____ percent from the capacity listed in the common vent sizing tables for two or more appliances.
10 percent
FG 504.2.3
Where commercial cooking appliances are vented by means of a Type I or II kitchen hood, an interlock shall prevent the _____________ from operating when the exhaust system is not operating.
appliance
FG 505.1.1
The vent terminal of a direct-vent appliance with an input of 60,000 Btu/hr shall be located at least ______ inches from any air opening into a building.
12 inches
FG Table 503.8
Generally, for vent systems serving more than one appliance, an 8 inch diameter connector is limited to a maximum horizontal length of what?
12 feet
FG Table 504.3.2
What is the minimum clearance required between a vent connector and combustible materials for an unlisted residential appliance with a draft hood served by a single wall metal pipe vent?
9 inches
FG Table 503.10.5
A vented wall furnace shall be located so that a door cannot swing within ______ inches of the air inlet or outlet.
12 inches
FG 608.4
Casing extension boots shall not be installed on a wall furnace unless?
listed as part of the appliance
FG 608.5
The floor register of a floor furnace is permitted to be installed where?
A. in a stairway landing
B. 4 inches from a wall
C. in a private doorway
D. 12 inches from draperies
D. 12 inches from draperies
FG 609.2 #3
The register of a floor furnace with a horizontal warm air outlet shall not be placed closer than _____ inches to the nearest corner.
6 inches
FG 609.2 #2
Two adjoining sides of the register of a floor furnace shall have a distance of at least ______ inches from walls to provide a walking path.
18 inches
FG 609.2 #2
Floor furnaces shall not be installed in what floor?
in a concrete floor built on grade
FG 609.2 #4
A floor furnace shall have a minimum clearance of 12 inches on all sides except the control side, which shall have a minimum clearance of what?
18 inches
FG 609.4
Outside ventilation air shall be supplied to the space containing a recirculating direct-fire industrial heater at a minimum rate of _____ cfm (cubic feet per minute) per 1,000 Btu/h of the rated input of the heater.
4 cfm
FG 612.5
Clothes dryer exhaust ducts shall be equipped with a what?
backdraft damper
FG 614.4
Where susceptible to damage from nails or screws, clothes dryer exhaust ducts shall be protected with shield plates when the duct is installed less than ______ inches from the face of the framing member.
1 1/4 inches
FG 614.7
Screws or other fasteners used to secure joints in clothes dryer exhaust ducts are limited to a maximum of ______ inch penetration into the duct.
1/8 inch
FG 614.8.2
Clothes dryer exhaust ducts shall not extend through what?
plenums
FG 614.4
Clothes dryer installations exhausting more than _______ cfm shall be provided with makeup air.
200 cfm
FG 614.6
Where a closet is designed for the installation of a clothes dryer, an opening having an area of not less than _______ square inches shall be provided for makeup air.
100 square inches
FG 614.6
Exhaust ducts for domestic clothes dryers shall have a nominal size of _____ inches in diameter.
4 inches
FG 614.8.1
Exhaust ducts for domestic clothes dryers shall be supported at intervals not greater than _____ feet and secured in place.
4 feet
FG 614.8.2
When protecting concealed dryer exhaust ducts from penetration by nails or screws, steel shield plates shall have a minimum thickness of what?
0.062 inch (16 gage)
FG 614.7
For the protection of concealed dryer exhaust ducts, protective shield plates shall extend a minimum of _____ inches above the sole plate and below the top plate.
2 inches
FG 614.7
Installation of a 4 inch radius mitered 90 degree elbow in a domestic dryer exhaust duct reduces the maximum specified length by what?
5 feet
FG Table 614.8.4.1
Commercial clothes dryer exhaust ducts shall have a minimum clearance of _____ inches to combustible construction.
6 inches
FG 614.9
The minimum finish dimension for a cleanout opening for a common dryer exhaust system in a multistory building is what?
12 inches
FG 614.10 #10
In a 5-story building, the exhaust shaft serving clothes dryers on each floor requires what?
A. a lining of sheet metal or gypsum board
B. fire dampers in the exhaust duct at each story
C. a continuously operating exhaust fan
D. a cleanout opening at each story
C. a continuously operating exhaust fan
FG 614.10 #7
Sauna heaters shall be equipped with a thermostat that limits the room temperature to no more than _______ degrees F.
194 degrees F
FG 615.6
The required ventilation opening to a sauna room shall be not less than _____ inches by ____ inches.
4 inches
8 inches
FG 615.7
In general, return air for a forced air furnace shall not be taken from a what?
A. room containing a direct vent appliance
B. crawl space
C. room containing an unvented appliance
D. room containing a solid fuel appliance
B. crawl space
FG 618.3 #7
Unless the prescribed vertical clearances dimensions are maintained, the inlet for outside or return air for a forced air heating system shall not be located less than ______ feet horizontally from a plumbing vent termination.
10 feet
FG 618.3 #1
Required outdoor air inlets for a residential forced air heating system shall be covered with screens having ______ inch openings.
1/4 inch
FG 618.4
Hangers for a suspended type unit heater must be what?
noncombustible
FG 620.2
Suspended type unit heaters shall be installed with clearances to combustible materials of not less than _____ inches at the sides of the unit.
18 inches
FG 620.4
Cooking appliances installed in areas where domestic cooking operations occur shall be listed and labeled as _____________ type appliances for domestic use.
household type
FG 623.3
A domestic open top broiler shall have a minimum clearance of ______ inches between the cooking top and combustible material above the hood.
24 inches
FG 623.5.1
Unless provisions are made for a reduced clearance, domestic cooking appliances shall have a vertical clearance above the cooking top of not less than _______ inches to combustible material and metal cabinets above.
30 inches
FG 623.7
Where the underside of the combustible material or metal cabinet above a cooking top is protected with 1/4 inch insulating millboard covered with sheet metal, a vertical clearance of not less than _______ inches is permitted above a domestic cooking appliance.
24 inches
FG 623.7 #1
Water heaters utilized both to supply potable water and provide hot water for space heating shall be listed and labeled and shall be installed in accordance with the what?
International Plumbing Code
FG 624.2
The required permanent notice placed outside of a sauna room warns users to not exceed _______ minutes in the sauna.
30 minutes
FG 615.7.1
If a thermostat is not an integral part of the sauna heater, the heat-sensing element shall be located a maximum of ______ inches below the ceiling.
6 inches
FG 615.6
A means to interrupt the electrical supply to a gas-fired air-conditioning appliance shall be provided within sight of and not more than ________ feet from the appliance.
50 feet
FG 627.10
The minimum clearance to combustible material from the back of a floor-mounted unit heater is what?
6 inches
FG 620.4
A 4-foot high post supporting an illuminating appliance shall be equivalent in strength to a _____ inch diameter schedule 40 steel pipe.
1 inch
FG 628.3
When provided, a timer controlling the main burner of a sauna is limited to a maximum operating time of what?
1 hour (60 minutes)
FG 615.6.1
Hydrogen pressure relief devices require ready what?
Ready access
FG 703.3.7
Hydrogen-generating and refueling appliances located in automotive motor fuel dispensing facilities and repair garages require what?
Require exhaust ventilation
FG 703.1
The nontoxic gas in gaseous hydrogen system must contain not less than _______ percent hydrogen by volume.
95 percent
FG 702.1
