Tennessee Fire Sprinkler (CMC-D) Contractor Examination

NFPA 13 (2022) is the standard that primarily addresses which of the following?

• AInstallation of automatic sprinkler systems
• BInspection, testing, and maintenance of existing water-based systems only
• CPortable fire extinguisher selection and placement only
• DCommercial cooking hood exhaust construction only

Under NFPA 13 (2022), which occupancy classification represents the lowest expected fire severity?

• AOrdinary Hazard Group 1
• BLight Hazard
• CExtra Hazard Group 1
• DOrdinary Hazard Group 2

A wet-pipe sprinkler system is best described as a system in which:

• APiping is filled with air or nitrogen until a sprinkler opens
• BOpen sprinklers discharge only after a detection system trips a deluge valve
• CPiping is filled with water under pressure so that water discharges immediately when a sp…
• DWater is held back by a preaction valve until both detection and a sprinkler operate

The K-factor of a sprinkler is used to relate which two quantities?

• APipe diameter and hanger spacing
• BOccupancy classification and hose-stream allowance
• CWater-supply duration and tank volume
• DDischarge flow and residual pressure at the sprinkler

Unless a listing requires a higher value, NFPA 13 (2022) requires a minimum residual operating pressure at a standard spray sprinkler of:

• A7 psi
• B15 psi
• C20 psi
• D50 psi

Ordinary-temperature sprinklers are generally identified by a maximum ceiling temperature of 100°F and a temperature rating in which range?

• A250°F to 300°F
• B135°F to 170°F
• C175°F to 225°F
• D325°F to 375°F

In NFPA terminology, a product that is 'listed' has been:

• ASelected by the installing contractor as convenient stock
• BAccepted by the building owner in the project specifications
• CEvaluated by an approved testing laboratory and identified as meeting appropriate standar…
• DShown on the shop drawing even if it has no test report

A fire department connection (FDC) on an NFPA 13 sprinkler system is provided primarily so that:

• AThe municipal water utility can meter fire-flow use
• BThe fire department can supplement the water supply by pumping into the system
• CDomestic plumbing fixtures can share the sprinkler riser
• DThe system can be drained without a main drain valve

Using the NFPA 13 (2022) density/area method, the common design point for Light Hazard occupancies is:

• A0.10 gpm/ft² over 1,500 ft²
• B0.15 gpm/ft² over 1,500 ft²
• C0.20 gpm/ft² over 1,500 ft²
• D0.30 gpm/ft² over 2,500 ft²

The NFPA 13 (2022) density/area design point for Ordinary Hazard Group 1 is:

• A0.10 gpm/ft² over 1,500 ft²
• B0.20 gpm/ft² over 1,500 ft²
• C0.15 gpm/ft² over 1,500 ft²
• D0.40 gpm/ft² over 2,500 ft²

The NFPA 13 (2022) density/area design point for Ordinary Hazard Group 2 is:

• A0.15 gpm/ft² over 2,500 ft²
• B0.20 gpm/ft² over 1,500 ft²
• C0.25 gpm/ft² over 1,500 ft²
• D0.20 gpm/ft² over 2,500 ft²

The NFPA 13 (2022) density/area design point for Extra Hazard Group 2 is:

• A0.30 gpm/ft² over 1,500 ft²
• B0.20 gpm/ft² over 2,500 ft²
• C0.40 gpm/ft² over 2,500 ft²
• D0.40 gpm/ft² over 1,500 ft²

A hydraulically calculated wet system protects an Ordinary Hazard Group 2 occupancy at 0.20 gpm/ft² over 1,500 ft². What is the sprinkler demand for that remote area before hose-stream allowance?

• A200 gpm
• B250 gpm
• C375 gpm
• D300 gpm

For standard pendent and upright spray sprinklers under unobstructed construction, NFPA 13 (2022) limits maximum protection area per sprinkler in Light Hazard occupancies to:

• A100 ft²
• B130 ft²
• C225 ft²
• D400 ft²

For standard spray sprinklers, the maximum protection area per sprinkler in Ordinary Hazard occupancies is:

• A225 ft²
• B130 ft²
• C100 ft²
• D168 ft²

A Light Hazard wet system is designed at 0.10 gpm/ft² over 1,500 ft². Combined hose-stream allowance is 100 gpm. What total water supply is required, and what tank volume is needed for the 30-minute Light Hazard duration?

• A150 gpm and 4,500 gallons
• B250 gpm and 7,500 gallons
• C250 gpm and 15,000 gallons
• D100 gpm and 3,000 gallons

For standard spray sprinklers, the maximum protection area per sprinkler in Extra Hazard occupancies is generally:

• A225 ft²
• B168 ft²
• C130 ft²
• D100 ft²

A K-5.6 sprinkler operates at the NFPA 13 minimum residual pressure of 7 psi. Approximately what flow does it discharge?

• A7.0 gpm
• B11.2 gpm
• C14.8 gpm
• D22.4 gpm

What is the standard K-factor for a 1/2-inch nominal orifice spray sprinkler?

• A2.8
• B5.6
• C8.0
• D11.2

Maximum spacing between standard spray sprinklers in Light Hazard and Ordinary Hazard occupancies is generally:

• A10 ft
• B12 ft
• C15 ft
• D18 ft

A Light Hazard K-5.6 sprinkler covers 15 ft by 15 ft (225 ft²) at 0.10 gpm/ft². What residual pressure is required at that sprinkler (ignore listing minimums other than the calculated flow)?

• A7 psi
• B12.8 psi
• C16.1 psi
• D22.5 psi

The maximum distance from a wall to a standard spray sprinkler is generally limited to:

• AThe full allowable sprinkler-to-sprinkler spacing
• BOne-half the allowable distance between sprinklers
• COne-fourth the allowable distance between sprinklers
• D4 inches, regardless of occupancy

Under unobstructed construction, standard pendent and upright spray sprinkler deflectors are generally located what distance below the ceiling?

• A1 inch to 12 inches
• BFlush with the finished ceiling only
• C18 inches to 24 inches
• DNot more than 4 inches and never less than 6 inches

A Light Hazard occupancy would use a 1,500 ft² wet-pipe remote area. If the same occupancy is protected by a dry-pipe system, the remote area used for hydraulic calculation is increased by 30 percent to:

• A1,800 ft²
• B1,950 ft²
• C2,100 ft²
• D2,500 ft²

A dry-pipe sprinkler system is best described as a system in which:

• APiping contains water that discharges as soon as a sprinkler fuses
• BPiping contains air or nitrogen under pressure, and water is admitted when a sprinkler op…
• CAll sprinklers are open and water floods the entire area when detection operates
• DA foam concentrate is stored in the branch lines

A deluge sprinkler system uses which combination of sprinklers and control?

• AClosed sprinklers and a wet-pipe alarm valve only
• BClosed sprinklers and a dry-pipe valve only
• COpen sprinklers attached to piping that is empty until a detection system opens a deluge…
• DResidential sprinklers calculated for two heads in a dwelling unit

According to NFPA 13 (2022), a dry-pipe system protecting a dwelling unit must deliver water from the inspector's test connection in not more than:

• A15 seconds
• B30 seconds
• C60 seconds
• D90 seconds

Per NFPA 13 (2022) Table 17.4.2.1, the maximum distance between hangers on 1-inch steel sprinkler pipe is:

• A8 ft
• B10 ft
• C12 ft
• D15 ft

For 2-inch steel sprinkler pipe, NFPA 13 (2022) Table 17.4.2.1 permits a maximum hanger spacing of:

• A10 ft
• B12 ft
• C15 ft
• D20 ft

NFPA 13 requires hangers and supports to be designed to support five times the weight of the water-filled pipe plus:

• A50 lb
• B100 lb
• C250 lb
• D500 lb

The distance between a hanger and the centerline of an upright sprinkler shall be not less than:

• A1 inch
• B3 inches
• C6 inches
• D12 inches

A wet-pipe Light Hazard system using quick-response sprinklers is allowed a 40 percent remote-area reduction from 1,500 ft². The reduced design area is:

• A600 ft²
• B750 ft²
• C900 ft²
• D1,200 ft²

The NFPA 13 small-room rule for standard spray sprinklers applies in Light Hazard unobstructed construction to rooms not exceeding:

• A200 ft²
• B400 ft²
• C800 ft²
• D1,500 ft²

For Light Hazard and Ordinary Hazard, the maximum floor area on any one floor protected by sprinklers supplied by one wet-system riser is generally:

• A25,000 ft²
• B40,000 ft²
• C52,000 ft²
• D78,000 ft²

An Extra Hazard Group 2 wet system is calculated at 0.40 gpm/ft² over 2,500 ft². Combined hose-stream allowance is 500 gpm. What is the total water-supply demand?

• A1,000 gpm
• B1,250 gpm
• C1,500 gpm
• D2,000 gpm

A single-interlock preaction system admits water into the piping when:

• AA sprinkler opens, with no detection required
• BA detection device operates, before a sprinkler necessarily opens
• CThe fire department charges the FDC only
• DA deluge valve is reset after the fire

Wet-pipe sprinkler systems shall not be used in spaces where the temperature cannot be maintained at or above:

• A32°F
• B40°F
• C50°F
• D70°F

An Ordinary Hazard Group 1 sprinkler covers 130 ft² at 0.15 gpm/ft². What flow is required from that sprinkler, and what residual pressure is needed if the sprinkler is K-5.6?

• A15.0 gpm at 7.2 psi
• B19.5 gpm at 12.1 psi
• C22.4 gpm at 16.0 psi
• D26.0 gpm at 21.6 psi

Where a ceiling slope exceeds 2 in 12, NFPA 13 generally requires which adjustment to the density/area remote area?

• ANo adjustment; slope never affects remote area
• BA 30 percent increase in remote area
• CA 40 percent decrease in remote area
• DA change from Light Hazard to Extra Hazard

Control-mode density/area (CMDA) sprinkler design differs from ESFR design in that CMDA:

• AUses a listed suppression density over a remote area to control a fire until manual suppr…
• BAlways omits ceiling sprinklers and uses in-rack sprinklers only
• CRequires open deluge nozzles and foam concentrate on every Light Hazard office
• DIs permitted only in one- and two-family dwellings

NFPA 13D (2022) applies to automatic sprinkler systems in which buildings?

• AHigh-rise hotels of any height
• BOne- and two-family dwellings and manufactured homes
• CWarehouses with high-piled storage
• DAny residential occupancy up to 12 stories

NFPA 13R (2022) is limited to residential occupancies that do not exceed which height criteria?

• ATwo stories and 30 ft
• BFour stories and 60 ft
• CSix stories and 75 ft
• DAny height if the building is apartments only

Unless reduced by 6.1.3, the water-supply duration required by NFPA 13D (2022) is:

• A7 minutes for every dwelling, regardless of size
• B10 minutes
• C30 minutes
• D60 minutes

NFPA 13D (2022) does not require sprinklers in bathrooms of what maximum area?

• A24 ft²
• B36 ft²
• C55 ft²
• D80 ft²

NFPA 13D (2022) permits omitting sprinklers from clothes closets, linen closets, and pantries when the area does not exceed 24 ft² and the walls and ceilings are:

• AFinished with any combustible wood paneling
• BSurfaced with noncombustible or limited-combustible materials
• CLeft unfinished regardless of lining
• DCovered with carpet on all six sides

An NFPA 13D system is supplied from a stored-water tank. Two residential sprinklers, each listed at 13 gpm, are the design. What minimum usable tank volume is required for the standard 10-minute duration, ignoring refill?

• A130 gallons
• B182 gallons
• C260 gallons
• D390 gallons

Hydraulic calculations for an NFPA 13R dwelling-unit compartment using listed residential sprinklers are based on a maximum of how many sprinklers, at 0.05 gpm/ft² or the listing, whichever is greater?

• AOne sprinkler
• BTwo sprinklers
• CFour sprinklers in the compartment
• DAll sprinklers on the floor without regard to compartments