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Nicet Level 1 Water Based Layout Exam Practice Questions and Answers | Verified and Updated
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Nicet Level 1 Water Based Layout Exam Practice Questions and Answers | Verified and Updated 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 Answer️️ -1 2/2 in. (ref. NFPA ...

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  • September 26, 2024
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  • 2024/2025
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Nicet Level 1 Water Based Layout Exam
Practice Questions and Answers |
Verified and Updated
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:

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