NFPA CWBSP Exam Practice Test Instant Access

Question 1

A kitchen in a restaurant encompasses an area of just over 700 ft2 (65 m2) with 2-hour fire rated walls. Does this meet the definition of a small room?

AYes, as the limit is 800 ft2 (74 m2).

BNo, 700 ft2 (65 m2) is too large.

CYes, as the walls are 1-hour fire rated.

DNo, small rooms are only of light hazard occupancy.

Answer : B

A kitchen area of over 700 ft in a restaurant typically does not meet the definition of a 'small room' in fire protection terminology, as it exceeds common size thresholds for such a classification, which often consider both the area and the specific use or hazard of the space.

Question 2

For a dry sprinkler installed in an insulated freezer box with an internal ambient temperature of -20F (-29) where

the barrel is exposed to an ambient temperature area of 40F (4C), what is the minimum exposed barrel length

required?

A12 in. (300 mm)

B14 in. (350 mm)

C16 in. (400 mm)

D18 in. (450 mm)

Answer : D

For a dry sprinkler in a freezer with an internal temperature of -20F and an external ambient temperature of 40F, a minimum exposed barrel length of 18 in. is typically recommended. This length helps prevent freezing within the barrel while accommodating temperature differentials.

Question 3

A pump with a rated capacity of 3,000 gpm (11,335 L/min) should have what size circulation relief valve?

A0.5 in. (13 mm)

B0.75 in. (19 mm)

C1.0 in. (25 mm)

D1.5 in. (38 mm)

Answer : D

A pump with a rated capacity of 3,000 gpm should be equipped with a circulation relief valve sized at least 1.5 in. This size helps manage excess pressure and flow within the pump system, ensuring stability and preventing damage.

Question 4

For an Ordinary Hazard with a design area of 1,500 ft2 (140 m2), what is the minimum number of standard pendent sprinklers required?

A12 sprinklers

B14 sprinklers

C18 sprinklers

D20 sprinklers

Answer : A

https://www.nfpa.org/news-blogs-and-articles/blogs/2023/01/30/basics-of-fire-sprinkler-calculations-part-1

Question 5

A owner of a new warehouse wishes to store a Class III product in ordinary cardboard boxes that contain 45 percent

by volume expanded plastic. What is the commodity classification?

ACartoned, Group A, expanded plastic

BCartoned, Class III

CCartoned, Class IV

DCartoned, Group A, unexpanded plastic

Answer : A

Cardboard boxes containing 45 percent by volume of expanded plastic are classified as Cartoned, Group A, expanded plastic. This classification reflects the high combustibility and potential fire challenge presented by the expanded plastic content.

Question 6

When designing an early suppression fast-response (ESFR) fire sprinkler system, what shall the design area of the most hydraulically demanding area consist of?

A960 ft2

B1200 ft2

C12 sprinklers

D14 sprinklers

Answer : C

Question 7

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.

NFPA CWBSP Certified Water-Based Systems Professionals Exam Practice Test