100% Free NFPA CWBSP Practice Test Questions

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?

A : 1.5 in. (40 mm)

B : 2 in. (50 mm)

C : 2.5 in. (65 mm)

D : 3 in. (75 mm)

Answer: B

Question 2

For an existing antifreeze system without a backflow prevention device, what size hole is required in the check valve separating the supply and the antifreeze?

A : 1 in. (0.79 mm)

B : 1 in. (1.59 mm)

C : 1 in. (3.17 mm)

D : 1 in. (6.35 mm)

Answer: A

Question 3

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?

A : 1.5 in. (40 mm)

B : 2 in. (50 mm)

C : 2.5 in. (65 mm)

D : 3 in. (75 mm)

Answer: B

Question 4

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

A : Schedule 5

B : Schedule 7

C : Schedule 10

D : Schedule 40

Answer: D

Question 5

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

A : 100Â°F (38Â°C)

B : 135Â°F (57Â°C)

C : 150Â°F (66â„ƒ)

D : 175Â°F (79â„ƒ)

Answer: C

Free Practice NFPA CWBSP Exam Questions 2025