NFPA CWBSP Exam Practice Test Instant Access

Question 1

What is the maximum distance of the top of the post on a post indicator valve from final grade?

A36 in. (900 mm)

B40 in. (1000 mm)

C48 in. (1200 mm)

D50 in. (1250 mm)

Answer : B

Post Indicator Valves

6.3.1

Where post indicator valves are used, they shall be set so that the top of each post is 32 in. to 40 in. (800 mm to 1.0 m) above the final grade.

Question 2

What is the required minimum design density/area for protection of floor stacked, idle wood pallets to a height of

8 ft (2.4 m) under a 30 ft (9.1 m) roof deck using high expansion foam with a K11.2 (160) CMDA sprinkler?

A0.225 gpm/ft2 (9.15 mm/min) over 1,250 ft2 (115 m2)

B0.225 gpm/ft2 (9.15 mm/min) over 2,500 ft2 (230 m2)

C0.45 gpm/ft2 (18.3 mm/min) over 1,250 ft2 (115 m2)

D0.45 gpm/ft2 (18.3 mm/min) over 2,500 ft2 (230 m2)

Answer : B

For floor-stacked idle wood pallets, a design density of 0.225 gpm/ft over a minimum design area is typically used for calculating water supply requirements. The larger area option (2,500 ft) provides a more conservative approach to ensuring adequate protection.

Question 3

In an existing system, the vertical clearance between a high volume low speed (HVLS) fan and a sprinkler shall be

A12 in. (300 mm).

B24 in. (600 mm).

C36 in. (900 mm).

D48 in. (1200 mm).

Answer : B

NFPA 13 requires a minimum vertical clearance between HVLS fans and sprinklers to prevent interference with the sprinkler spray pattern. A 24 in. (600 mm) clearance is commonly recommended to ensure that the fan does not disrupt the distribution of water in the event of a fire.

Question 4

What is the thrust force on an 8 in. (205 mm) ductile iron 90 bend with a water test pressure of 200 psi (13.8 bar)?

A5,288 lb (2,400 kg)

B9,097 lb (4,126 kg)

C13,685 lb (6,207 kg)

D18,194 lb (8,253 kg)

Answer : A

The thrust force on a bend in a piping system can be calculated based on the water pressure and the size of the pipe. An 8-inch ductile iron bend at 200 psi would generate significant force, but among the given options, 5,288 lb is the most plausible based on typical hydraulic calculations.

Question 5

What is the required density for a warehouse with 10 ft (3 m) deep multiple-row racks without an in-rack sprinkler

system that contains a nonencapsulated storing Class IlI commodity on wooden pallets and has a storage height of

18 ft (5.4 m) and 8 ft (2.4 m) aisles, and is using standard, ordinary temperature sprinkler heads?

A0.25 gpm/ft2 (10.2 mm/min)

B0.33 gpm/ft2 (13 mm/min)

C0.44 gpm/ft2 (17.9 mm/min)

D0.52 gpm/ft2 (20.8 mm/min)

Answer : B

For a warehouse with the described characteristics, a design density of 0.33 gpm/ft is a common requirement to ensure adequate protection for Class III commodities on wooden pallets, taking into account the storage configuration and commodity type.

Question 6

What is the maximum floor area that can be protected by a single ordinary hazard sprinkler system?

A25,000 ft2 (2,320 m2)

B40,000 ft2 (3,720 m2)

C52,000 ft2 (4,830 m2)

D70,000 ft2 (6,503 m2)

Answer : C

The maximum floor area on any one floor to be protected by sprinklers supplied by any one sprinkler system riser or combined system riser shall be as follows:

1. Light hazard --- 52,000 ft2 (4830 m2)

2. Ordinary hazard --- 52,000 ft2 (4830 m2)

3. * Extra hazard --- Hydraulically calculated --- 40,000 ft2 (3720 m2)

4. High-piled Storage --- High-piled storage (as defined in 3.3.100) and storage covered by other NFPA standards --- 40,000 ft2 (3720 m2)

5. In-rack Storage --- 40,000 ft2 (3720 m2)

Question 7

Where must a diesel engine driven fire pump's fuel tank be located for areas subject to temperatures below 32F (0)?

AThe same room as the fire pump.

BThe exterior of the building.

CThe room next to the fire pump room.

DThe room below the fire pump.

Answer : A

The fuel tank for a diesel engine-driven fire pump must be located in the same room as the fire pump, especially in areas subject to freezing temperatures, to ensure that the diesel fuel remains at a usable temperature and the pump is readily available for operation during an emergency.

NFPA Certified Water-Based Systems Professionals CWBSP Exam Practice Test