NICET Level II Water Based Systems Actual Exam Newest With Complete 250 Questions And
Correct Detailed Answers| Brand New Version!
Question 1
In a Light Hazard occupancy utilizing standard spray upright sprinklers, what is the maximum
allowable protection area for a single sprinkler?
A) 130 sq. ft.
B) 168 sq. ft.
C) 200 sq. ft.
D) 225 sq. ft.
E) 400 sq. ft.
Correct Answer: D) 225 sq. ft.
Rationale: Per NFPA 13, the maximum protection area for a standard spray upright or
pendent sprinkler in a Light Hazard occupancy is 225 sq. ft., provided the system is
hydraulically calculated.
Question 2
What is the maximum spacing permitted between standard spray sprinklers in an Ordinary
Hazard Group 1 occupancy?
A) 10 feet
B) 12 feet
C) 15 feet
D) 18 feet
E) 20 feet
Correct Answer: C) 15 feet
Rationale: According to NFPA 13, standard spray sprinklers in Ordinary Hazard
occupancies (both Group 1 and 2) are limited to a maximum spacing of 15 feet between
sprinklers.
Question 3
When using the "Three Times Rule" for obstructions located against a wall, a sprinkler must be
positioned at a distance at least three times the ________ of the obstruction away from the
obstruction.
A) Width
B) Length
C) Depth
D) Maximum Dimension
E) Diameter
Correct Answer: D) Maximum Dimension
Rationale: NFPA 13 specifies that for obstructions located against walls, the sprinkler must
be at least three times the maximum dimension (or width) of the obstruction away to
ensure the spray pattern can reach the wall behind the object.
, 2
Question 4
In a dry pipe system, the "Design Area" for hydraulic calculations must be increased by what
percentage without changing the density?
A) 10%
B) 25%
C) 30%
D) 50%
E) 100%
Correct Answer: C) 30%
Rationale: Per NFPA 13, dry pipe systems and double-interlock preaction systems require a
30% increase in the remote design area to account for the delay in water reaching the
sprinklers after the air is exhausted.
Question 5
Which of the following is the correct Hazen-Williams "C" value to be used for unlined cast iron
pipe in a water-based fire protection system?
A) 100
B) 120
C) 130
D) 140
E) 150
Correct Answer: A) 100
Rationale: NFPA 13 Table 28.2.4.8.1 specifies a "C" value of 100 for unlined cast iron pipe.
This lower value accounts for the higher friction loss caused by the rougher internal
surface of the pipe.
Question 6
A fire pump is required to provide 150% of its rated capacity at no less than ________ of its
rated pressure.
A) 50%
B) 65%
C) 75%
D) 100%
E) 140%
Correct Answer: B) 65%
Rationale: NFPA 20 requires that a fire pump's performance curve must show that it can
deliver 150% of its rated flow at a pressure of at least 65% of the rated head (pressure).
Question 7
What is the minimum pressure required at the most remote 2.5-inch hose connection on a Class I
standpipe system?
, 3
A) 50 psi
B) 65 psi
C) 100 psi
D) 175 psi
E) 250 psi
Correct Answer: C) 100 psi
Rationale: NFPA 14 requires that Class I standpipe systems be designed to provide a
minimum residual pressure of 100 psi at the most hydraulically remote 2.5-inch hose
connection.
Question 8
In a private fire service main, what is the minimum depth of cover required for underground
piping to protect against mechanical damage if the pipe is under a roadway?
A) 1 foot
B) 2 feet
C) 3 feet
D) 4 feet
E) 5 feet
Correct Answer: C) 3 feet
Rationale: NFPA 24 requires a minimum of 3 feet of cover for underground piping under
roadways to prevent damage from vehicle loads, or 1 foot below the frost line, whichever is
greater.
Question 9
What is the K-factor of a sprinkler with a 1/2-inch (12.7 mm) nominal orifice?
A) 2.8
B) 4.2
C) 5.6
D) 8.0
E) 11.2
Correct Answer: C) 5.6
Rationale: The standard nominal K-factor for a 1/2-inch orifice sprinkler is 5.6. This is the
base reference used for most Light and Ordinary Hazard calculations.
Question 10
A "Dead-End Main" is a pipe that:
A) Is not used for fire protection
B) Is capped at both ends
C) Is supplied by water from only one direction
D) Has no valves
E) Is used only for domestic water
Correct Detailed Answers| Brand New Version!
Question 1
In a Light Hazard occupancy utilizing standard spray upright sprinklers, what is the maximum
allowable protection area for a single sprinkler?
A) 130 sq. ft.
B) 168 sq. ft.
C) 200 sq. ft.
D) 225 sq. ft.
E) 400 sq. ft.
Correct Answer: D) 225 sq. ft.
Rationale: Per NFPA 13, the maximum protection area for a standard spray upright or
pendent sprinkler in a Light Hazard occupancy is 225 sq. ft., provided the system is
hydraulically calculated.
Question 2
What is the maximum spacing permitted between standard spray sprinklers in an Ordinary
Hazard Group 1 occupancy?
A) 10 feet
B) 12 feet
C) 15 feet
D) 18 feet
E) 20 feet
Correct Answer: C) 15 feet
Rationale: According to NFPA 13, standard spray sprinklers in Ordinary Hazard
occupancies (both Group 1 and 2) are limited to a maximum spacing of 15 feet between
sprinklers.
Question 3
When using the "Three Times Rule" for obstructions located against a wall, a sprinkler must be
positioned at a distance at least three times the ________ of the obstruction away from the
obstruction.
A) Width
B) Length
C) Depth
D) Maximum Dimension
E) Diameter
Correct Answer: D) Maximum Dimension
Rationale: NFPA 13 specifies that for obstructions located against walls, the sprinkler must
be at least three times the maximum dimension (or width) of the obstruction away to
ensure the spray pattern can reach the wall behind the object.
, 2
Question 4
In a dry pipe system, the "Design Area" for hydraulic calculations must be increased by what
percentage without changing the density?
A) 10%
B) 25%
C) 30%
D) 50%
E) 100%
Correct Answer: C) 30%
Rationale: Per NFPA 13, dry pipe systems and double-interlock preaction systems require a
30% increase in the remote design area to account for the delay in water reaching the
sprinklers after the air is exhausted.
Question 5
Which of the following is the correct Hazen-Williams "C" value to be used for unlined cast iron
pipe in a water-based fire protection system?
A) 100
B) 120
C) 130
D) 140
E) 150
Correct Answer: A) 100
Rationale: NFPA 13 Table 28.2.4.8.1 specifies a "C" value of 100 for unlined cast iron pipe.
This lower value accounts for the higher friction loss caused by the rougher internal
surface of the pipe.
Question 6
A fire pump is required to provide 150% of its rated capacity at no less than ________ of its
rated pressure.
A) 50%
B) 65%
C) 75%
D) 100%
E) 140%
Correct Answer: B) 65%
Rationale: NFPA 20 requires that a fire pump's performance curve must show that it can
deliver 150% of its rated flow at a pressure of at least 65% of the rated head (pressure).
Question 7
What is the minimum pressure required at the most remote 2.5-inch hose connection on a Class I
standpipe system?
, 3
A) 50 psi
B) 65 psi
C) 100 psi
D) 175 psi
E) 250 psi
Correct Answer: C) 100 psi
Rationale: NFPA 14 requires that Class I standpipe systems be designed to provide a
minimum residual pressure of 100 psi at the most hydraulically remote 2.5-inch hose
connection.
Question 8
In a private fire service main, what is the minimum depth of cover required for underground
piping to protect against mechanical damage if the pipe is under a roadway?
A) 1 foot
B) 2 feet
C) 3 feet
D) 4 feet
E) 5 feet
Correct Answer: C) 3 feet
Rationale: NFPA 24 requires a minimum of 3 feet of cover for underground piping under
roadways to prevent damage from vehicle loads, or 1 foot below the frost line, whichever is
greater.
Question 9
What is the K-factor of a sprinkler with a 1/2-inch (12.7 mm) nominal orifice?
A) 2.8
B) 4.2
C) 5.6
D) 8.0
E) 11.2
Correct Answer: C) 5.6
Rationale: The standard nominal K-factor for a 1/2-inch orifice sprinkler is 5.6. This is the
base reference used for most Light and Ordinary Hazard calculations.
Question 10
A "Dead-End Main" is a pipe that:
A) Is not used for fire protection
B) Is capped at both ends
C) Is supplied by water from only one direction
D) Has no valves
E) Is used only for domestic water
