Nicet Level 1 - Water Based Layout
[ACTUAL EXAM] LATEST VERSION
[QUESTIONS AND ANSWERS] WITH
PRACTICE EXAM DETAILED AND
VERIFIED FOR GUARANTEED PASS-
LATEST UPDATE 2025 GRADED A
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.
[ACTUAL EXAM] LATEST VERSION
[QUESTIONS AND ANSWERS] WITH
PRACTICE EXAM DETAILED AND
VERIFIED FOR GUARANTEED PASS-
LATEST UPDATE 2025 GRADED A
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.
