NFPA 72 EXAM 2025 QUESTIONS AND
ANSWERS
What does PFLA stand for? - ANS Power Limited Fire Alarm.
What does NPFLA stand for? - ANS Non-Power Limited Fire Alarm.
What material must NPFLA circuit conductors be made from? - ANS Only solid or stranded
copper is permitted.
What is a single station detector? - ANS Battery powered smoke detectors that do not
communicate off premises.
What is a multiple station detector? - ANS Mains powered smoke detectors with battery
backup that are linked together, so that if one unit initiates, alarms in all detectors will sound.
They do not communicate off premises.
How frequently must household single and multiple station detectors be inspected and tested?
- ANS In accordance with the manufacturers recommendations, at least monthly.
How frequently must household fire alarm systems be inspected and tested? - ANS At least
every 3 years, by a qualified service technician.
How frequently must heat detectors be tested? - ANS Two or more annually different
detectors must be tested each year though and within 5 years all detectors must have been
tested.
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, What does "restorable" mean? - ANS The detector can be "restored" or "reused" after it has
initiated an alarm.
What does "non-restorable" mean? - ANS The detector cannot be "reused" after it has
initiated an alarm. (Think of a heat detector, which self-destructs upon initiating.)
What size conductors are permitted? - ANS Size 18 A.W.G and 16 A.W.G are permitted,
provided they do not exceed certain rated ampacities.
What is used to protect transformers or other devices supplied from power-supply conductors?
- ANS An over-current device not rated over 20 Amperes.
When located within 7 feet of the floor, how shall cables be fastened? - ANS Cables shall be
fastened in an approved manner at intervals of not more than 18 inches.
Single conductors shall not be smaller than ___ A.W.G? - ANS 18.
Conductors of 26 A.W.G shall only be permitted in which circumstances? - ANS Where
spliced with a connector listed as suitable for 26 to 24 A.W.G.
How should PFLA conductors NOT be installed? - ANS PFLA conductors shall not be strapped,
taped or attached to the exterior of any conduit or raceway.
What is a Plenum cable? What are its characteristics? - ANS Cable that can be installed in
ducts, plenums or other spaces used for environmental air.
It has adequate fire resistance and low smoke producing characteristics.
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ANSWERS
What does PFLA stand for? - ANS Power Limited Fire Alarm.
What does NPFLA stand for? - ANS Non-Power Limited Fire Alarm.
What material must NPFLA circuit conductors be made from? - ANS Only solid or stranded
copper is permitted.
What is a single station detector? - ANS Battery powered smoke detectors that do not
communicate off premises.
What is a multiple station detector? - ANS Mains powered smoke detectors with battery
backup that are linked together, so that if one unit initiates, alarms in all detectors will sound.
They do not communicate off premises.
How frequently must household single and multiple station detectors be inspected and tested?
- ANS In accordance with the manufacturers recommendations, at least monthly.
How frequently must household fire alarm systems be inspected and tested? - ANS At least
every 3 years, by a qualified service technician.
How frequently must heat detectors be tested? - ANS Two or more annually different
detectors must be tested each year though and within 5 years all detectors must have been
tested.
COPYRIGHT © 2025 BRAINBARTER ALL RIGHTS RESERVED 1
, What does "restorable" mean? - ANS The detector can be "restored" or "reused" after it has
initiated an alarm.
What does "non-restorable" mean? - ANS The detector cannot be "reused" after it has
initiated an alarm. (Think of a heat detector, which self-destructs upon initiating.)
What size conductors are permitted? - ANS Size 18 A.W.G and 16 A.W.G are permitted,
provided they do not exceed certain rated ampacities.
What is used to protect transformers or other devices supplied from power-supply conductors?
- ANS An over-current device not rated over 20 Amperes.
When located within 7 feet of the floor, how shall cables be fastened? - ANS Cables shall be
fastened in an approved manner at intervals of not more than 18 inches.
Single conductors shall not be smaller than ___ A.W.G? - ANS 18.
Conductors of 26 A.W.G shall only be permitted in which circumstances? - ANS Where
spliced with a connector listed as suitable for 26 to 24 A.W.G.
How should PFLA conductors NOT be installed? - ANS PFLA conductors shall not be strapped,
taped or attached to the exterior of any conduit or raceway.
What is a Plenum cable? What are its characteristics? - ANS Cable that can be installed in
ducts, plenums or other spaces used for environmental air.
It has adequate fire resistance and low smoke producing characteristics.
COPYRIGHT © 2025 BRAINBARTER ALL RIGHTS RESERVED 2
