Nicet Level 1 - Water Based Layout Exa
Questions and Answers 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.
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,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.
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, 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):
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Questions and Answers 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.
©COPYRIGHT 2025, ALL RIGHTS RESERVED 1
,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.
©COPYRIGHT 2025, ALL RIGHTS RESERVED 2
, 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):
©COPYRIGHT 2025, ALL RIGHTS RESERVED 3
