FST Sprinkler Systems 5

Question 1

Which sprinkler system configuration is most appropriate for protecting a computer server room where accidental water discharge must be minimized?

Accepted Answer

Double-interlock preaction system

Answer

A double-interlock preaction system requires both detection and sprinkler activation, minimizing accidental water discharge into sensitive electronic environments.

Question 2

Per NFPA 13, what is the required minimum operating pressure at the most remote sprinkler during a hydraulic calculation?

Accepted Answer

10 psi

Answer

NFPA 13 requires a minimum of 7 psi at any sprinkler for residential systems and at least 7 psi for standard sprinklers, but the common minimum used for standard spray heads is 7 psi; however the exam-standard answer for most sprinklers is 7 psi.

Question 3

A technician is installing a concealed sprinkler head in a finished ceiling. What critical installation error must be avoided?

Accepted Answer

Mismatching the cover plate temperature rating with the sprinkler temperature rating

Answer

The cover plate must have the same or lower temperature rating than the sprinkler to ensure the plate drops away before the sprinkler activates.

Question 4

What is the purpose of an antifreeze solution in a sprinkler system protecting an unheated loading dock area?

Accepted Answer

To prevent water in exposed piping from freezing and causing pipe rupture

Answer

Antifreeze systems fill exposed piping with a freeze-resistant solution to prevent ice formation and pipe failure in areas subject to freezing temperatures.

Question 5

Under NFPA 25, when must a 5-year internal pipe inspection be performed on a wet pipe sprinkler system?

Accepted Answer

Every 5 years, or sooner if microbiologically influenced corrosion (MIC) is suspected

Answer

NFPA 25 requires internal pipe inspections on a 5-year cycle, with earlier inspection warranted if MIC or significant corrosion is detected.

(FST) Fire Safety Technician Certification Practice Test

(FST) Fire Safety Technician Certification Practice Test

FST Sprinkler Systems 5