NICET LEVEL I-III WATER BASED LAYOUT EXAM AND
PRACTICE EXAM NEWEST ACTUAL EXAM COMPLETE 350
QUESTIONS AND CORRECT DETAILED ANSWERS (VERIFIED
ANSWERS) |ALREADY GRADED A+
Toggle hangers shall be permitted only for the support of pipe __________ inches or
smaller in size under ceilings of hollow tile or metal lath and plaster. - CORRECT
ANSWER 1 2/2 in. (ref. NFPA 13 2016 Sec. 9.2.1.1.2.
While conducting a flow test, the chosen hydrant should be ______ - CORRECT
ANSWER As close to the property where the sprinkler system is being installed. (Ref,
NFPA 13 Sec. A.24.2.2. or NFPA 291)
What formula is used to determine the discharge coefficiant relating pressure and flow
rate? - CORRECT ANSWER K = Q / (Square root of P)
What best describes a tree system? - CORRECT ANSWER Cross mains and the
branch lines are not tied together, providing only one path of water flow.
Factors that define Occupancy Group Hazard 2 include: - CORRECT ANSWER
Quantity and combustibility of contents are moderate to high.
Stockpiles of contents with moderate rates of heat release do not exceed 12 ft and
stockpiles with high heat release do not exceed 8 ft
(Ref NFPA 13 Sec. 5.3.2)
Which of the following standards contain reqs. pertaining to the installation of
underground piping? - CORRECT ANSWER NFPA 13 & 24 (Both in Chapter 10)
Which of the following should you inspect on an extension cord before each use? -
CORRECT ANSWER The grounding prong & the insulation for nicks, cuts, or damage
________ indicates a mandatory req. according to NFPA definitions. - CORRECT
ANSWER Shall.
(Ref. NFPA 13 2016, Sec. 3.2.4.)
100 GPM is flowing through 100' of 1 1/4 in. Sch. 40 pipe. How many feet of 1 1/2 in.
pipe will produce the same friction loss? - CORRECT ANSWER Assume this is
,Schedule 40 pipe, C = 120. Use the Hazen-Williams formula to calculate the friction loss
for the 1 ¼ in. pipe and the 1 ½ in. pipe.
For 1 ¼ in. pipe (ID = 1.38):
P friction loss = 4.52 x Q 1.85
c 1.85 x d 4.87
P friction loss = 4.52 x 100 1.85
120 1.85 x 1.38 4.87
P friction loss = 0.672 psi/ft
For 1 ½ in. pipe (ID = 1.61):
P friction loss = 4.52 x Q 1.85
c 1.85 x d 4.87
P friction loss = 4.52 x 100 1.85
120 1.85 x 1.61 4.87
P friction loss = 0.317 psi/ft
Step #2: Determine the total friction loss for 100 gpm flowing through 100 ft. of 1 ¼ in.
Schedule 40 black steel pipe: 100 ft. x 0.672 psi/ft = 67.2 psi
Step #3: Determine the pipe length to produce the same friction loss in the 1 ½ in. pipe:
y ft. x 0.317 psi/ft = 67.2 psi
y = 67.2 ÷ 0.317
y = 212 ft.
,A basic contract: (choose all that apply) - CORRECT ANSWER 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.
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
Both outlets are 2 ½ in., with the same outlet coefficient. Therefore, Q 1 = Q 2
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.
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).
Where the suction supply is under sufficient pressure to be of material value without the
pump, the pump shall be installed with a _________, which shall be at least as large as
the pipe size required for the discharge pipe. - CORRECT ANSWER Bypass.
Reference NFPA 20 2016, Section 4.15.4.
What is the temp. class and color code for a sprinkler located at a ceiling w/ a max temp
of 150 degrees? - CORRECT ANSWER Intermediate, white.
Reference NFPA 13 2016, Table 6.2.5.1.
When conducting a hydrostatic flow test for a new fire sprinkler system, the test
pressure should be _______ psi for ________ hours. - CORRECT ANSWER 200, 2.
Reference NFPA 13 2016, Section 25.2.1.1.
