NICET Level 1 – Water-Based Layout Practice
Questions and Answers | 100% Pass Guarantee
Section 1: NFPA 13 Standards (Questions 1-14)
This section covers general requirements, definitions, and system types per NFPA 13 Chapter 4
(General Requirements) and Chapter 5 (Classification of Occupancies).
1. What is the minimum discharge density for Light Hazard occupancies under NFPA 13?
a) 0.10 gpm/ft²
b) 0.15 gpm/ft²
c) 0.25 gpm/ft²
d) 0.30 gpm/ft²
Correct Answer: b) 0.15 gpm/ft²
Rationale: Light Hazard requires a minimum density of 0.15 gpm/ft² over the remote area.
(NFPA 13 Section 5.2)
2. Calculate the remote area for a wet system in an Ordinary Hazard Group 2 occupancy
with a ceiling height of 20 ft.
a) 1300 ft²
b) 1500 ft²
c) 1650 ft²
d) 1950 ft²
Correct Answer: c) 1650 ft²
Rationale: Base area 1500 ft², increased 10% for ceiling height >10 ft (1% per foot over 10 ft:
10% = 150 ft²). (NFPA 13 Section 27.2.4.2)
3. For dry systems, what is the maximum system volume without quick-opening devices?
a) 500 gal
b) 750 gal
c) 1000 gal
d) 1500 gal
,Correct Answer: b) 750 gal
Rationale: Dry systems limited to 750 gal unless quick-opening devices are used. (NFPA 13
Section 8.2.3.1)
4. What occupancy class includes woodworking shops with moderate combustibles?
a) Light Hazard
b) Ordinary Hazard Group 1
c) Ordinary Hazard Group 2
d) Extra Hazard Group 1
Correct Answer: c) Ordinary Hazard Group 2
Rationale: OH2 for moderate to high combustibility like woodworking. (NFPA 13 Section 5.3.2)
5. In a preaction system, what activates the deluge valve?
a) Heat detection
b) Manual pull
c) Both a and b
d) Water flow only
Correct Answer: c) Both a and b
Rationale: Preaction requires detection (heat/smoke) or manual activation before water release.
(NFPA 13 Section 8.3.1)
6. Calculate the discharge for a K-8 sprinkler at 7 psi.
a) 16.8 gpm
b) 21.2 gpm
c) 23.7 gpm
d) 28.3 gpm
Correct Answer: b) 21.2 gpm
Rationale: Q = K √P = 8 × √7 ≈ 21.2 gpm. (NFPA 13 Section 6.4.1)
7. What is the minimum pipe slope for wet systems?
a) 1/8 in./ft
b) 1/4 in./ft
c) 1/2 in./ft
d) No slope required
Correct Answer: b) 1/4 in./ft
, Rationale: To prevent water pockets; 1/4 in./ft for branches. (NFPA 13 Section 8.16.2.2)
8. For ESFR sprinklers, what is the maximum ceiling height without in-rack?
a) 30 ft
b) 40 ft
c) 45 ft
d) 50 ft
Correct Answer: c) 45 ft
Rationale: Updated in 2025 for high ceilings; ESFR up to 45 ft for certain commodities. (NFPA
13 Section 12.1.2.1)
9. What system type is required for freezer storage?
a) Wet
b) Dry
c) Preaction
d) Deluge
Correct Answer: b) Dry
Rationale: Dry systems prevent freezing in unheated areas. (NFPA 13 Section 8.4.1)
10. Calculate the area adjustment for a dry system remote area of 1500 ft².
a) 1500 ft²
b) 1950 ft²
c) 2250 ft²
d) 3000 ft²
Correct Answer: b) 1950 ft²
Rationale: 30% increase for dry systems: 1500 × 1.3 = 1950 ft². (NFPA 13 Section 27.2.4.4)
11. What is the K-factor for standard spray sprinklers?
a) 5.6
b) 8.0
c) 11.2
d) 14.0
Correct Answer: a) 5.6
Rationale: Standard orifice K=5.6 for upright/pendent. (NFPA 13 Section 6.2.3)
Questions and Answers | 100% Pass Guarantee
Section 1: NFPA 13 Standards (Questions 1-14)
This section covers general requirements, definitions, and system types per NFPA 13 Chapter 4
(General Requirements) and Chapter 5 (Classification of Occupancies).
1. What is the minimum discharge density for Light Hazard occupancies under NFPA 13?
a) 0.10 gpm/ft²
b) 0.15 gpm/ft²
c) 0.25 gpm/ft²
d) 0.30 gpm/ft²
Correct Answer: b) 0.15 gpm/ft²
Rationale: Light Hazard requires a minimum density of 0.15 gpm/ft² over the remote area.
(NFPA 13 Section 5.2)
2. Calculate the remote area for a wet system in an Ordinary Hazard Group 2 occupancy
with a ceiling height of 20 ft.
a) 1300 ft²
b) 1500 ft²
c) 1650 ft²
d) 1950 ft²
Correct Answer: c) 1650 ft²
Rationale: Base area 1500 ft², increased 10% for ceiling height >10 ft (1% per foot over 10 ft:
10% = 150 ft²). (NFPA 13 Section 27.2.4.2)
3. For dry systems, what is the maximum system volume without quick-opening devices?
a) 500 gal
b) 750 gal
c) 1000 gal
d) 1500 gal
,Correct Answer: b) 750 gal
Rationale: Dry systems limited to 750 gal unless quick-opening devices are used. (NFPA 13
Section 8.2.3.1)
4. What occupancy class includes woodworking shops with moderate combustibles?
a) Light Hazard
b) Ordinary Hazard Group 1
c) Ordinary Hazard Group 2
d) Extra Hazard Group 1
Correct Answer: c) Ordinary Hazard Group 2
Rationale: OH2 for moderate to high combustibility like woodworking. (NFPA 13 Section 5.3.2)
5. In a preaction system, what activates the deluge valve?
a) Heat detection
b) Manual pull
c) Both a and b
d) Water flow only
Correct Answer: c) Both a and b
Rationale: Preaction requires detection (heat/smoke) or manual activation before water release.
(NFPA 13 Section 8.3.1)
6. Calculate the discharge for a K-8 sprinkler at 7 psi.
a) 16.8 gpm
b) 21.2 gpm
c) 23.7 gpm
d) 28.3 gpm
Correct Answer: b) 21.2 gpm
Rationale: Q = K √P = 8 × √7 ≈ 21.2 gpm. (NFPA 13 Section 6.4.1)
7. What is the minimum pipe slope for wet systems?
a) 1/8 in./ft
b) 1/4 in./ft
c) 1/2 in./ft
d) No slope required
Correct Answer: b) 1/4 in./ft
, Rationale: To prevent water pockets; 1/4 in./ft for branches. (NFPA 13 Section 8.16.2.2)
8. For ESFR sprinklers, what is the maximum ceiling height without in-rack?
a) 30 ft
b) 40 ft
c) 45 ft
d) 50 ft
Correct Answer: c) 45 ft
Rationale: Updated in 2025 for high ceilings; ESFR up to 45 ft for certain commodities. (NFPA
13 Section 12.1.2.1)
9. What system type is required for freezer storage?
a) Wet
b) Dry
c) Preaction
d) Deluge
Correct Answer: b) Dry
Rationale: Dry systems prevent freezing in unheated areas. (NFPA 13 Section 8.4.1)
10. Calculate the area adjustment for a dry system remote area of 1500 ft².
a) 1500 ft²
b) 1950 ft²
c) 2250 ft²
d) 3000 ft²
Correct Answer: b) 1950 ft²
Rationale: 30% increase for dry systems: 1500 × 1.3 = 1950 ft². (NFPA 13 Section 27.2.4.4)
11. What is the K-factor for standard spray sprinklers?
a) 5.6
b) 8.0
c) 11.2
d) 14.0
Correct Answer: a) 5.6
Rationale: Standard orifice K=5.6 for upright/pendent. (NFPA 13 Section 6.2.3)
