NICET LEVEL 1 – WATER BASED LAYOUT VERSION 2 ACTUAL EXAM NEWEST WITH COMPLETE
250 QUESTIONS AND CORRECT DETAILED ANSWERS| BRAND NEW VERSION!!
Question 1
According to NFPA 13, toggle hangers are permitted only for the support of pipe of which size or
smaller when installed under ceilings of hollow tile or metal lath and plaster?
A) 1 inch
B) 1 1/4 inches
C) 1 1/2 inches
D) 2 inches
E) 2 1/2 inches
Correct Answer: C) 1 1/2 inches
Rationale: Per NFPA 13 (2016) Section 9.2.1.1.2, toggle hangers have structural limitations
when used with hollow or brittle ceiling materials. They are restricted to supporting
smaller, lighter pipe loads, specifically 1 1/2 inches or smaller, to prevent ceiling failure or
hanger pull-out.
Question 2
While conducting a water flow test to determine the available supply for a new layout, which
hydrant should ideally be chosen as the test hydrant?
A) The hydrant furthest from the property to test the worst-case scenario.
B) The hydrant with the largest diameter outlet.
C) The hydrant as close as possible to the property where the system is being installed.
D) Any hydrant on a different water main to check for grid reliability.
E) Only a hydrant painted light blue (Class AA).
Correct Answer: C) As close to the property where the sprinkler system is being installed.
Rationale: NFPA 13 and NFPA 291 emphasize that the flow test must reflect the actual
water supply characteristics that will feed the system. Using the closest hydrant minimizes
the discrepancy caused by friction loss in the public mains between the test point and the
system riser.
Question 3
Which formula is used to determine the discharge coefficient (K-factor) relating pressure and
flow rate for a sprinkler head?
A)
𝐾 =𝑄×𝑃
B)
𝐾 = 𝑃/√𝑄
, 2
C)
𝐾 = 𝑄/√𝑃
D)
𝐾 = √𝑄/𝑃
E)
𝐾 = 29.84 × 𝑑 2
Correct Answer: C) K = Q / (Square root of P)
Rationale: The K-factor represents the orifice size and discharge characteristics of a
sprinkler. In hydraulics, flow (Q) is equal to the K-factor multiplied by the square root of
the pressure (P). Therefore, to find K, you divide the flow by the square root of the
pressure.
Question 4
In fire protection layout, what best describes a "tree system"?
A) A system where branch lines are tied together at both ends.
B) A system where water flows in multiple paths to reach a single head.
C) Cross mains and branch lines are not tied together, providing only one path for water flow.
D) A system using only upright sprinklers.
E) A system with a circular main around the building.
Correct Answer: C) Cross mains and the branch lines are not tied together, providing only
one path of water flow.
Rationale: A tree system is the most basic layout. Unlike grid or loop systems, if a pipe is
blocked or breaks in a tree system, every head downstream of that point loses its water
supply because there is no secondary path for the water to travel.
Question 5
Which of the following factors specifically define an "Ordinary Hazard Group 2" occupancy?
A) Combustibility is low and quantities of combustibles are small.
B) Quantity and combustibility of contents are moderate to high.
C) Stockpiles of contents with high heat release exceed 12 feet.
D) Only non-combustible materials are stored in the area.
E) The building is a high-rise residential structure.
Correct Answer: B) Quantity and combustibility of contents are moderate to high.
, 3
Rationale: NFPA 13 Section 5.3.2 defines OH2 as occupancies where the quantity and
combustibility of contents are moderate to high, with stockpiles of moderate heat release
not exceeding 12 feet and high heat release not exceeding 8 feet.
Question 6
Which NFPA standards contain the primary requirements pertaining to the installation of
underground piping for fire protection systems?
A) NFPA 13 and NFPA 72
B) NFPA 13 and NFPA 24
C) NFPA 20 and NFPA 25
D) NFPA 14 and NFPA 20
E) NFPA 101 and NFPA 5000
Correct Answer: B) NFPA 13 & 24
Rationale: NFPA 13 covers the installation of the sprinkler system itself, including its
underground lead-in, while NFPA 24 is the dedicated standard for the Installation of
Private Fire Service Mains and Their Appurtenances.
Question 7
According to safety standards, which components of an extension cord should you inspect before
each use on a layout job site?
A) Only the color of the cord to ensure it is high-visibility.
B) The total length to ensure it doesn't exceed 50 feet.
C) The grounding prong and the insulation for nicks, cuts, or damage.
D) The manufacturer's date of production.
E) Whether the cord is coiled or straight.
Correct Answer: C) The grounding prong & the insulation for nicks, cuts, or damage
Rationale: OSHA requires that all electrical equipment be inspected before use. A missing
grounding prong or damaged insulation poses an immediate electrocution hazard,
especially in the wet environments common to fire protection work.
Question 8
According to NFPA definitions, which word indicates a "mandatory requirement"?
A) Should
B) May
C) Can
D) Shall
E) Standard
Correct Answer: D) Shall.
Rationale: In NFPA terminology, the word "shall" indicates a mandatory requirement. The
word "should" indicates a recommendation or something that is advised but not required.
, 4
Question 9
100 GPM is flowing through 100 feet of 1 1/4 in. Schedule 40 pipe. How many feet of 1 1/2 in.
pipe will produce the same friction loss?
A) 100 ft
B) 150 ft
C) 212 ft
D) 300 ft
E) 452 ft
Correct Answer: C) 212 ft.
Rationale: Using the Hazen-Williams formula (
𝐶 = 120
), the friction loss for 1 1/4" pipe (
𝐼𝐷1.38
) is 0.672 psi/ft, totaling 67.2 psi for 100ft. For 1 1/2" pipe (
𝐼𝐷1.61
), the loss is 0.317 psi/ft. Dividing 67.2 by 0.317 results in approximately 212 feet of 1 1/2"
pipe required to generate the same total friction loss.
Question 10
Which of the following should be included in a basic fire protection installation contract?
A) Names of the parties and start/completion dates.
B) References to contract documents and the specific scope of work.
C) The personal home addresses of the fitters.
D) Only A and B.
E) A, B, and C.
Correct Answer: D) Contains the names of the parties involved, References the contract
documents, Discusses the work that is to be done, and Discusses start and completion dates.
Rationale: A standard professional contract must define the "Who" (parties), "What"
(documents and scope), and "When" (dates) to be legally binding and clear. Personal
employee data is not part of the basic project contract.
Question 11
In the Hazen-Williams friction loss formula (
𝑃 = 𝐿 × [𝑦 × 𝑄 𝑧 ]/[𝑐1.85 × 𝑑 4.87 ]
), what are the values for the constant
𝑦
250 QUESTIONS AND CORRECT DETAILED ANSWERS| BRAND NEW VERSION!!
Question 1
According to NFPA 13, toggle hangers are permitted only for the support of pipe of which size or
smaller when installed under ceilings of hollow tile or metal lath and plaster?
A) 1 inch
B) 1 1/4 inches
C) 1 1/2 inches
D) 2 inches
E) 2 1/2 inches
Correct Answer: C) 1 1/2 inches
Rationale: Per NFPA 13 (2016) Section 9.2.1.1.2, toggle hangers have structural limitations
when used with hollow or brittle ceiling materials. They are restricted to supporting
smaller, lighter pipe loads, specifically 1 1/2 inches or smaller, to prevent ceiling failure or
hanger pull-out.
Question 2
While conducting a water flow test to determine the available supply for a new layout, which
hydrant should ideally be chosen as the test hydrant?
A) The hydrant furthest from the property to test the worst-case scenario.
B) The hydrant with the largest diameter outlet.
C) The hydrant as close as possible to the property where the system is being installed.
D) Any hydrant on a different water main to check for grid reliability.
E) Only a hydrant painted light blue (Class AA).
Correct Answer: C) As close to the property where the sprinkler system is being installed.
Rationale: NFPA 13 and NFPA 291 emphasize that the flow test must reflect the actual
water supply characteristics that will feed the system. Using the closest hydrant minimizes
the discrepancy caused by friction loss in the public mains between the test point and the
system riser.
Question 3
Which formula is used to determine the discharge coefficient (K-factor) relating pressure and
flow rate for a sprinkler head?
A)
𝐾 =𝑄×𝑃
B)
𝐾 = 𝑃/√𝑄
, 2
C)
𝐾 = 𝑄/√𝑃
D)
𝐾 = √𝑄/𝑃
E)
𝐾 = 29.84 × 𝑑 2
Correct Answer: C) K = Q / (Square root of P)
Rationale: The K-factor represents the orifice size and discharge characteristics of a
sprinkler. In hydraulics, flow (Q) is equal to the K-factor multiplied by the square root of
the pressure (P). Therefore, to find K, you divide the flow by the square root of the
pressure.
Question 4
In fire protection layout, what best describes a "tree system"?
A) A system where branch lines are tied together at both ends.
B) A system where water flows in multiple paths to reach a single head.
C) Cross mains and branch lines are not tied together, providing only one path for water flow.
D) A system using only upright sprinklers.
E) A system with a circular main around the building.
Correct Answer: C) Cross mains and the branch lines are not tied together, providing only
one path of water flow.
Rationale: A tree system is the most basic layout. Unlike grid or loop systems, if a pipe is
blocked or breaks in a tree system, every head downstream of that point loses its water
supply because there is no secondary path for the water to travel.
Question 5
Which of the following factors specifically define an "Ordinary Hazard Group 2" occupancy?
A) Combustibility is low and quantities of combustibles are small.
B) Quantity and combustibility of contents are moderate to high.
C) Stockpiles of contents with high heat release exceed 12 feet.
D) Only non-combustible materials are stored in the area.
E) The building is a high-rise residential structure.
Correct Answer: B) Quantity and combustibility of contents are moderate to high.
, 3
Rationale: NFPA 13 Section 5.3.2 defines OH2 as occupancies where the quantity and
combustibility of contents are moderate to high, with stockpiles of moderate heat release
not exceeding 12 feet and high heat release not exceeding 8 feet.
Question 6
Which NFPA standards contain the primary requirements pertaining to the installation of
underground piping for fire protection systems?
A) NFPA 13 and NFPA 72
B) NFPA 13 and NFPA 24
C) NFPA 20 and NFPA 25
D) NFPA 14 and NFPA 20
E) NFPA 101 and NFPA 5000
Correct Answer: B) NFPA 13 & 24
Rationale: NFPA 13 covers the installation of the sprinkler system itself, including its
underground lead-in, while NFPA 24 is the dedicated standard for the Installation of
Private Fire Service Mains and Their Appurtenances.
Question 7
According to safety standards, which components of an extension cord should you inspect before
each use on a layout job site?
A) Only the color of the cord to ensure it is high-visibility.
B) The total length to ensure it doesn't exceed 50 feet.
C) The grounding prong and the insulation for nicks, cuts, or damage.
D) The manufacturer's date of production.
E) Whether the cord is coiled or straight.
Correct Answer: C) The grounding prong & the insulation for nicks, cuts, or damage
Rationale: OSHA requires that all electrical equipment be inspected before use. A missing
grounding prong or damaged insulation poses an immediate electrocution hazard,
especially in the wet environments common to fire protection work.
Question 8
According to NFPA definitions, which word indicates a "mandatory requirement"?
A) Should
B) May
C) Can
D) Shall
E) Standard
Correct Answer: D) Shall.
Rationale: In NFPA terminology, the word "shall" indicates a mandatory requirement. The
word "should" indicates a recommendation or something that is advised but not required.
, 4
Question 9
100 GPM is flowing through 100 feet of 1 1/4 in. Schedule 40 pipe. How many feet of 1 1/2 in.
pipe will produce the same friction loss?
A) 100 ft
B) 150 ft
C) 212 ft
D) 300 ft
E) 452 ft
Correct Answer: C) 212 ft.
Rationale: Using the Hazen-Williams formula (
𝐶 = 120
), the friction loss for 1 1/4" pipe (
𝐼𝐷1.38
) is 0.672 psi/ft, totaling 67.2 psi for 100ft. For 1 1/2" pipe (
𝐼𝐷1.61
), the loss is 0.317 psi/ft. Dividing 67.2 by 0.317 results in approximately 212 feet of 1 1/2"
pipe required to generate the same total friction loss.
Question 10
Which of the following should be included in a basic fire protection installation contract?
A) Names of the parties and start/completion dates.
B) References to contract documents and the specific scope of work.
C) The personal home addresses of the fitters.
D) Only A and B.
E) A, B, and C.
Correct Answer: D) Contains the names of the parties involved, References the contract
documents, Discusses the work that is to be done, and Discusses start and completion dates.
Rationale: A standard professional contract must define the "Who" (parties), "What"
(documents and scope), and "When" (dates) to be legally binding and clear. Personal
employee data is not part of the basic project contract.
Question 11
In the Hazen-Williams friction loss formula (
𝑃 = 𝐿 × [𝑦 × 𝑄 𝑧 ]/[𝑐1.85 × 𝑑 4.87 ]
), what are the values for the constant
𝑦
