NFPA NFPA 13 Sprinkler Systems 2

Question 1

What color code indicates a sprinkler with a temperature rating of 135–170°F (57–77°C) under NFPA 13?

Accepted Answer

Uncolored/Black

Answer

NFPA 13 specifies that sprinklers rated at 135–170°F are uncolored (natural brass) or marked with a black color code.

Question 2

Under NFPA 13, a deluge system differs from a preaction system in that a deluge system has:

Accepted Answer

Open sprinkler heads throughout

Answer

A deluge system uses open (non-fusible) sprinkler heads so that water discharges from all heads simultaneously when the deluge valve opens.

Question 3

According to NFPA 13, what is the required minimum pipe size for a single sprinkler branch line?

Accepted Answer

¾ inch

Answer

NFPA 13 requires a minimum pipe size of ¾ inch for branch lines serving individual sprinklers.

Question 4

Which NFPA 13 system type uses a pneumatic or electric detection system to open the valve before a sprinkler fuses?

Accepted Answer

Preaction

Answer

A preaction system requires operation of a supplemental detection system to open the preaction valve before water can flow to sprinklers.

Question 5

Under NFPA 13, what hazard classification applies to auto showrooms, bakeries, and laundries?

Accepted Answer

Ordinary hazard Group 1

Answer

NFPA 13 classifies auto showrooms, bakeries, and laundries as Ordinary Hazard Group 1 occupancies.

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