ITFAS-Level-1 Dumps with Practice Exam Questions Answers

NFPA 72 sets a maximum time limit for verifying that signals frominitiating devicesreach thesupervising stationduring testing. The purpose is to ensure that communication paths and processing do not introduce unsafe delays.

NFPA 72 (2022), Section 14.4.3.4.2:

"Where connected to a supervising station, the signal shall be confirmed as received at the supervising station within 90 seconds of initiating device activation."

Correct answer: C. 90 seconds

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Forsealed lead-acid batteries, NFPA 72 specifies that their condition be verified by checkingspecific gravity, which indicates battery charge status and health.

NFPA 72 (2022), Table 14.4.3.2 — Testing Methods:

Lead-acid batteries shall be tested semiannually by measuring specific gravity.

If batteries are sealed and specific gravity cannot be tested, voltage and visual checks are used instead.

Correct answer: C. By verifying specific gravity

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NFPA 72 requires that the secondary power supply be capable of powering the fire alarm system underquiescent or supervisory loadfor 24 hours, followed by full alarm load for a minimum time (typically 5 or 15 minutes depending on system type).

NFPA 72 (2022), Section 10.6.7.2.1.1:

“The secondary power supply shall have sufficient capacity to operate the system under quiescent load (supervisory condition) for a minimum of 24 hours…”

Testing should verify operation under thissupervisory (normal monitoring)condition.

Correct answer: D. Supervisory load

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NFPA 72 defines a time requirement for how quickly a waterflow switch must respond when a sprinkler system activates. The waterflow initiating device (typically a paddle-type switch) must send an alarmwithin 90 seconds, but the system may have aretard delayof up to90 seconds, making the total allowable time120 seconds.

NFPA 72 (2022), Section 17.13.2:

“Waterflow alarm-initiating devices shall be set to operate within 90 seconds after the flow begins. Retard devices shall not delay the signal more than an additional 90 seconds.”

Thus, the maximumtotal activation timeis:

90 seconds operation + 90 seconds retard =120 seconds max

Correct answer: C. 120 seconds

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In aClass Afire alarm circuit, asingle opencondition does not affect communication but must still be annunciated as atroublesignal.

NFPA 72 (2022), Section 12.3.1.1.1.4:

“A single open condition on a Class A pathway shall result in a trouble signal.”

This maintains system operation while alerting of a wiring fault.

Correct answer: D. Trouble

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