Minnesota Journeyman Sprinkler Fitter Certification Exam – Minnesota Licensing Preparation, 2026/2027 – Practice Questions and Study Review

MINNESOTA JOURNEYMAN SPRINKLER FITTER CERTIFICATION EXAM

Question 1
According to NFPA 25, how often must private fire hydrants be inspected?
A) Monthly
B) Quarterly
C) Semiannually
D) Annually or after each operation
E) Every five years
Correct Answer: D) Annually or after each operation
Rationale: NFPA 25 (2017), Section 7.3.1, mandates that private fire hydrants must be
inspected at least once a year or whenever the hydrant has been operated to ensure it is in
proper working condition and has drained correctly.

Question 2
What is the primary scope and application of NFPA 13R?
A) One- and two-family dwellings
B) Residential occupancies up to and including four stories in height
C) Commercial high-rise buildings
D) Storage facilities and warehouses
E) Industrial manufacturing plants
Correct Answer: B) Residential occupancies up to and including four stories in height
Rationale: NFPA 13R is specifically titled the “Standard for the Installation of Sprinkler
Systems in Low-Rise Residential Occupancies,” which applies to residential buildings up to
four stories tall.

Question 3
In accordance with NFPA 13, what is the maximum protection area for a single standard spray
upright or pendent sprinkler in an Ordinary Hazard occupancy?
A) 100 square feet
B) 120 square feet
C) 130 square feet
D) 150 square feet
E) 225 square feet
Correct Answer: C) 130 square feet
Rationale: NFPA 13 (2016), Table 8.6.2.2.1(b), specifies that the maximum coverage area for
a standard sprinkler head in an Ordinary Hazard environment is 130 square feet.

Question 4
What is the maximum coverage area for a standard spray sprinkler head in a Light Hazard
occupancy?
A) 130 square feet
B) 150 square feet

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C) 180 square feet
D) 200 square feet
E) 225 square feet
Correct Answer: E) 225 square feet
Rationale: Per NFPA 13 (2016) Section 8.6.2.2.1 and the Minnesota State Fire Code (2020),
the allowable coverage for Light Hazard sprinklers is 225 square feet for hydraulically
calculated systems.

Question 5
What is the typical maximum coverage area for a sprinkler head in an Extra Hazard occupancy?
A) 90 to 130 square feet
B) 130 to 150 square feet
C) 150 to 200 square feet
D) 225 square feet
E) 400 square feet
Correct Answer: A) 90 to 130 square feet
Rationale: NFPA 13 (2016) specifies that Extra Hazard occupancies require closer spacing
due to the high heat release rate, typically limiting coverage to between 90 and 130 square
feet depending on the density and specific arrangement.

Question 6
What is the maximum allowable coverage area for an Early Suppression Fast Response (ESFR)
sprinkler head?
A) 80 square feet
B) 100 square feet
C) 130 square feet
D) 144 square feet
E) 196 square feet
Correct Answer: B) 100 square feet
Rationale: NFPA 13 (2016) Section 8.12.2.2.1 states that the maximum protection area for
ESFR sprinklers is 100 square feet to ensure high-momentum water discharge can
penetrate the fire plume.

Question 7
What is the standard coverage area for sprinklers used in high-piled storage occupancies?
A) 100 or 130 square feet
B) 150 or 200 square feet
C) 225 square feet
D) 400 square feet
E) 50 square feet
Correct Answer: A) 100 or 130 square feet

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Rationale: NFPA 13 (2016) Section 12.6.2 specifies that for storage occupancies, the
coverage is generally limited to 100 or 130 square feet based on the commodity
classification and storage height.

Question 8
What is the minimum required air pressure that must be maintained in a pressure tank used for
fire protection?
A) 30 psi
B) 50 psi
C) 75 psi
D) 100 psi
E) 175 psi
Correct Answer: C) 75 psi
Rationale: NFPA 20 (2016) Section 14.2.4 requires that a minimum air pressure of 75 psi be
maintained to ensure the tank can discharge the required volume of water at the necessary
pressure.

Question 9
In a standpipe system, what is the maximum length of a horizontal run for a 1-inch pipe feeding
a 1½-inch hose line?
A) 10 feet
B) 20 feet
C) 30 feet
D) 50 feet
E) 80 feet
Correct Answer: B) 20 feet
Rationale: NFPA 14 (2016) Section 7.3.1 specifies pipe sizing for hose lines; a 1-inch pipe is
permitted for horizontal runs up to 20 feet when feeding 1½-inch hose stations.

Question 10
According to NFPA 14, what size pipe is required for 1½-inch hose line runs between 20 feet and
80 feet in length?
A) 1 inch
B) 1¼ inch
C) 1½ inch
D) 2 inch
E) 2½ inch
Correct Answer: B) 1¼ inch
Rationale: For lengths exceeding 20 feet but not more than 80 feet, NFPA 14 Section 7.3.1
requires a minimum pipe size of 1¼ inch.

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Question 11
For a 1½-inch hose line run that exceeds 80 feet in length, what is the minimum required pipe
size?
A) 1 inch
B) 1¼ inch
C) 1½ inch
D) 2 inch
E) 2½ inch
Correct Answer: C) 1½ inch
Rationale: NFPA 14 Section 7.3.1 mandates that pipe runs over 80 feet for 1½-inch hose
lines must be at least 1½ inches in diameter to account for friction loss.
Question 12
What glass bulb color identifies an "Ordinary" temperature-rated sprinkler (135°F to 170°F)?
A) Orange or Red
B) Yellow or Green
C) Blue
D) Purple
E) Black
Correct Answer: A) Orange or Red
Rationale: Table 5.1.1.6.1 of NFPA 13 (2016) identifies Orange (135°F) and Red (155°F) as
the standard glass bulb colors for Ordinary temperature sprinklers.

Question 13
A sprinkler head with a yellow or green glass bulb belongs to which temperature classification?
A) Ordinary
B) Intermediate
C) High
D) Extra High
E) Ultra High
Correct Answer: B) Intermediate
Rationale: Per NFPA 13, Intermediate temperature sprinklers (175°F to 225°F) are
identified by yellow or green glass bulbs.

Question 14
A blue glass bulb on a sprinkler head indicates which temperature rating range?
A) 135°F to 170°F
B) 175°F to 225°F
C) 250°F to 300°F
D) 325°F to 375°F
E) 400°F to 475°F