NFPA CWBSP Exam Practice Test Instant Access

Question 1

A 4 in. (102 mm) nominal diameter Schedule 10 sprinkler main is to be supported from the structure utilizing a trapeze

hanger with a span of 8 ft (2.4 m). Using Schedule 40 pipe for the trapeze hanger, what is the minimum diameter pipe

that should be used?

A1.5 in. (40 mm)

B2 in. (50 mm)

C2.5 in. (65 mm)

D3 in. (75 mm)

Answer : B

For supporting a 4 in. Schedule 10 sprinkler main with a trapeze hanger spanning 8 ft, a Schedule 40 pipe of at least 2 in. in diameter is typically recommended. This size provides adequate strength for the span and weight of the sprinkler main.

Question 2

What is the maximum allowable water delivery time for a dry pipe system protecting an Ordinary Hazard Group II occupancy?

A40 seconds

B45 seconds

C50 seconds

D60 seconds

Answer : C

The maximum allowable water delivery time for a dry pipe system protecting an Ordinary Hazard Group II occupancy is addressed under numeral 8.2.3.6

Question 3

What is the maximum percentage a fire pump's rated pressure is permitted to produce at churn condition?

A65 percent

B100 percent

C120 percent

D140 percent

Answer : D

A fire pump at churn condition (no flow, maximum pressure) is permitted to produce up to 140 percent of its rated pressure. This condition ensures the pump can maintain sufficient pressure in the system during varying demand conditions without exceeding the system's designed pressure limits.

Question 4

If a jockey pump start point is set at 165 psi (11.4 bar), the jockey pump stop point should be not less than

A130 psi (8.96 bar).

B153 psi (10.55 bar).

C175 psi (12.06 bar).

D188 psi (12.96 bar).

Answer : C

The jockey pump stop point is typically set slightly above the fire pump start point to prevent unnecessary cycling of the fire pump. If the jockey pump start point is at 165 psi, the stop point should be higher to maintain system pressure and prevent overlap with the fire pump activation threshold, making 175 psi a suitable stop point.

Question 5

Which type of pipe does not require a special listing to use threaded fittings?

ASchedule 5

BSchedule 7

CSchedule 10

DSchedule 40

Answer : D

Schedule 40 pipe does not require a special listing to use threaded fittings, as it is a common standard for pipe thickness and is widely used in fire protection systems for its durability and compatibility with standard fittings.

Question 6

What is the minimum temperature rating of ceiling sprinklers in roll paper stored at 15 ft. (4.6 m) or less?

A100F (38C)

B135F (57C)

C150F (66)

D175F (79)

Answer : C

The minimum temperature rating for ceiling sprinklers in roll paper storage areas that are 15 ft or less in height is typically 150F (66C). This rating is selected to provide a buffer between the ambient temperature conditions and the activation temperature of the sprinklers, preventing accidental activation.

Question 7

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.

NFPA CWBSP Certified Water-Based Systems Professionals Exam Practice Test