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NICET LEVEL 1 - WATER BASED LAYOUT
Exam Questions with 100% Verified Answers
Latest Versions 2025 Graded A+
Define both the constant, y, and the exponent ,z, for q in the Hazen-
Williams friction loss formula shown Below:
P = L x (y x Q^z)
(c^1.85 x d^4.87) - correct answer - 4.52, 1.85.
Reference NFPA 13 2016 Section 23.4.2.1.1.
A water flow test was conducted using 1 hydrant, flowing with two 2 1/2
inch outlets. Which is the approximate water flow rate, if the pitot reading
was 15 psi. The hydrant outlet coefficiant is 0.8. - correct answer - The
correct answer is 1156 gpm.
Solution #12:
Q 1 = 29.84 cd 2 √ P
Q 1 = 29.84 x 0.8 x (2.5) 2 x √15
Q 1 = 577.8 gpm
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Both outlets are 2 ½ in., with the same outlet coefficient. Therefore, Q 1 =
Q2
The total flow rate is then: Q 1 + Q 2 = Q total
Q total = 577.85 gpm + 577.85 gpm = 1155.70 gpm, round up to 1156 gpm
If a cross main in a pipe sprinkler system has three branch lines
per bay, one intermediate hanger shall be permitted to be omitted, if a
branch line hanger is installed on the starter peice. - correct answer - Steel.
Reference NFPA 13 2016, Section 9.2.4.3.
NFPA 13 specifies the depth of cover fro underground pipe of a minimum
of 2 1/2 ft, 3 ft. under driveways and 4 ft. under railroads tracks. However, it
must be at least 1ft. below the frost line. If the frost line is 2 1/2 ft, what is
the minimum depth of cover under a driveway? - correct answer - 3 ½ ft.
Reference NFPA 13 2016, Section 10.4. If you are laying pipes under
driveways, you must go down a minimum of 3 ft. However, you must be at
least 1 ft. below the frost line. In this case that is 3 ½ ft.
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Ordinary Hazard is a term that specifies: - correct answer - An occupancy
classification, More combustibility than light hazard, and A system area
limitation of 52,000 ft 2 .
Reference NFPA 13 2016, Sections 5.3 and 8.2.1.
What type of temperature is required for a sprinkler installed 2ft above a
heating duct? - correct answer - Intermediate.
Reference NFPA 13 2016, Table 8.3.2.5(a).
A three screw ceiling flange is used to attach the hangers for 6 in. Sch. 40
pipe. If 1 3/4" lag screws are used, what is the maximum spacing for the
hangers? - correct answer - 10 ft.
Reference NFPA 13 2016, Section 9.1.5.2.2 - when 2 in. screws cannot be
used, 1 ¾ in. screws can be used if the maximum hanger spacing in 10 ft.
The owners info cert. indicates the property to be protected will contain
nitrate film. Which of the following is also req. to be provided? - correct
answer - Type, arrangement, location, and intended maximum quantities.
Reference NFPA 13 2016, Figure A.23.1(b).
NICET LEVEL 1 - WATER BASED LAYOUT
Exam Questions with 100% Verified Answers
Latest Versions 2025 Graded A+
Define both the constant, y, and the exponent ,z, for q in the Hazen-
Williams friction loss formula shown Below:
P = L x (y x Q^z)
(c^1.85 x d^4.87) - correct answer - 4.52, 1.85.
Reference NFPA 13 2016 Section 23.4.2.1.1.
A water flow test was conducted using 1 hydrant, flowing with two 2 1/2
inch outlets. Which is the approximate water flow rate, if the pitot reading
was 15 psi. The hydrant outlet coefficiant is 0.8. - correct answer - The
correct answer is 1156 gpm.
Solution #12:
Q 1 = 29.84 cd 2 √ P
Q 1 = 29.84 x 0.8 x (2.5) 2 x √15
Q 1 = 577.8 gpm
, Page | 2
Both outlets are 2 ½ in., with the same outlet coefficient. Therefore, Q 1 =
Q2
The total flow rate is then: Q 1 + Q 2 = Q total
Q total = 577.85 gpm + 577.85 gpm = 1155.70 gpm, round up to 1156 gpm
If a cross main in a pipe sprinkler system has three branch lines
per bay, one intermediate hanger shall be permitted to be omitted, if a
branch line hanger is installed on the starter peice. - correct answer - Steel.
Reference NFPA 13 2016, Section 9.2.4.3.
NFPA 13 specifies the depth of cover fro underground pipe of a minimum
of 2 1/2 ft, 3 ft. under driveways and 4 ft. under railroads tracks. However, it
must be at least 1ft. below the frost line. If the frost line is 2 1/2 ft, what is
the minimum depth of cover under a driveway? - correct answer - 3 ½ ft.
Reference NFPA 13 2016, Section 10.4. If you are laying pipes under
driveways, you must go down a minimum of 3 ft. However, you must be at
least 1 ft. below the frost line. In this case that is 3 ½ ft.
, Page | 3
Ordinary Hazard is a term that specifies: - correct answer - An occupancy
classification, More combustibility than light hazard, and A system area
limitation of 52,000 ft 2 .
Reference NFPA 13 2016, Sections 5.3 and 8.2.1.
What type of temperature is required for a sprinkler installed 2ft above a
heating duct? - correct answer - Intermediate.
Reference NFPA 13 2016, Table 8.3.2.5(a).
A three screw ceiling flange is used to attach the hangers for 6 in. Sch. 40
pipe. If 1 3/4" lag screws are used, what is the maximum spacing for the
hangers? - correct answer - 10 ft.
Reference NFPA 13 2016, Section 9.1.5.2.2 - when 2 in. screws cannot be
used, 1 ¾ in. screws can be used if the maximum hanger spacing in 10 ft.
The owners info cert. indicates the property to be protected will contain
nitrate film. Which of the following is also req. to be provided? - correct
answer - Type, arrangement, location, and intended maximum quantities.
Reference NFPA 13 2016, Figure A.23.1(b).
