FST Sprinkler Systems 2

Question 1

What is the minimum water supply duration required for a light hazard sprinkler system per NFPA 13?

Accepted Answer

30 minutes

Answer

NFPA 13 requires a minimum 30-minute water supply duration for light hazard occupancies.

Question 2

Which type of sprinkler head is designed to discharge water in a pattern that does not wet the ceiling?

Accepted Answer

In-rack sprinkler

Answer

In-rack sprinklers are positioned within storage racks and direct water downward without wetting the ceiling.

Question 3

A wet pipe sprinkler system is found to have a constant drip from a sprinkler head that has not activated. What is the most likely cause?

Accepted Answer

A leaking sprinkler seat or cracked bulb

Answer

Constant dripping from an unactivated sprinkler typically indicates a failed heat-sensitive element or a leaking seat.

Question 4

Under NFPA 13, what is the maximum distance allowed between sprinklers in a light hazard occupancy with standard spray sprinklers?

Accepted Answer

20 feet

Answer

NFPA 13 allows a maximum 15-foot spacing between sprinklers in light hazard occupancies, but the maximum coverage area per head governs; 15 ft is the standard answer for spacing.

Question 5

What component in a dry pipe sprinkler system prevents water from entering the piping until a sprinkler activates?

Accepted Answer

Dry pipe valve

Answer

The dry pipe valve holds pressurized air or nitrogen in the piping and only opens to admit water when pressure drops after sprinkler activation.

(FST) Fire Safety Technician Certification Practice Test

(FST) Fire Safety Technician Certification Practice Test

FST Sprinkler Systems 2