Authentic NICET Certification Exam ITFAS-Level-1 Questions Answers

Duct detectors are used to shut down air handling systems to prevent smoke from circulating. NFPA 72 requires that these detectors and their shutdown functions be testedannually.

NFPA 72 (2022), Table 14.4.3.2 – Testing Frequencies:

"Duct-type smoke detectors with HVAC shutdown" → Frequency: Annually.

The test must verifydetector functionandHVAC control activation.

Correct answer: D. Annually

Normally, smoke detector sensitivity testing is requiredevery two years, butNFPA 72 allows extension up to five yearsif thedetectors have not experienced frequent nuisance alarmsand accuraterecords of performanceare maintained.

NFPA 72 (2022), Section 14.4.4.3.2:

“Where detectors are cleaned and maintained and where records of nuisance alarms and changes in detector locations are kept, the sensitivity testing interval shall be permitted to be extended to 5 years.”

Keeping a log of nuisance alarms helps assess the reliability of the detectors over time.

Correct answer: C. Records of nuisance alarms shall be maintained

Asupervisory signalindicates a condition thatrequires attention but is not an alarm. In sprinkler systems, one of the most common supervisory signals comes from avalve tamper switch, indicating a partially closed valve, or sometimes awaterflow switch resetissue.

NFPA 72 (2022), Section 3.3.269:

"Supervisory Signal — A signal indicating the need for action in connection with the supervision of guard tours, the fire suppression systems, or equipment or maintenance features of related systems."

Also:Table A.10.14.2.1

Shows thatwaterflow valves and tamper switchesare typical sources of supervisory signals.

So the correct answer — awaterflow alarmimplies something abnormal with the fire protection system, possibly indicating a tamper switch or system supervisory issue.

Correct answer: D. A waterflow alarm has been activated

===========