NFPA NFPA 13 Sprinkler Systems 3

Question 1

Under NFPA 13, how far must a sprinkler deflector be positioned below a smooth flat ceiling for a standard pendent sprinkler?

Accepted Answer

1 to 12 inches

Answer

NFPA 13 requires the deflector of a standard pendent sprinkler to be positioned 1 to 12 inches below a smooth flat ceiling.

Question 2

What is the minimum required flow pressure at the most remote sprinkler in an NFPA 13 light hazard system?

Accepted Answer

10 psi

Answer

NFPA 13 requires a minimum residual pressure of 7 psi at the most remote sprinkler, but design pressure at each sprinkler must meet the hydraulic calculation, commonly 7 psi minimum.

Question 3

According to NFPA 13, which component must be provided at the base of each sprinkler riser to facilitate system testing and maintenance?

Accepted Answer

Butterfly valve with tamper switch

Answer

NFPA 13 requires a supervised control valve (such as an OS&Y or butterfly valve with a tamper switch) at the base of each riser.

Question 4

Under NFPA 13, what is required when a sprinkler system is installed in a building with a combustible concealed space?

Accepted Answer

Sprinklers must be installed in the concealed space

Answer

NFPA 13 requires sprinklers in combustible concealed spaces unless specific exemptions based on construction type and insulation apply.

Question 5

What is the maximum permitted distance between sprinklers along a branch line under NFPA 13 for light hazard occupancies?

Accepted Answer

15 feet

Answer

NFPA 13 limits the maximum distance between sprinklers along a branch line to 15 feet in light hazard occupancies.

NFPA - National Fire Protection Association Practice Test

NFPA - National Fire Protection Association Practice Test

NFPA NFPA 13 Sprinkler Systems 3