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OH, Fire Alarm Study Materials
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OH, Fire Alarm Study MaterialsSmoke detectors installed in air duct systems are normally used to control spreading
smoke.
T/F ? - answer True
A two-wire Class B circuit has 10 smoke detectors on it. A Class B circuit will typically
have an end-of-line device on the last detector in the circuit. The end-of-line device is
usually a _____. - answer Resistor
A smoke detector installed in an air duct system is permitted to be used as a substitute
for open area protection.
T/F? - answer FALSE -- Areas in duct, below floors/above ceilings count as separate
areas.
If control circuits are used to shut down elevator power, the control circuits are not
required to be monitored for the presence of operating voltage. - answer FALSE
According to the Ohio Fire Code, in a covered mall building exceeding 50,000 ft 2 in
area, a (an) ______ shall be provided. - answerEmergency Voice/Alarm
Communications System
A detector that is capable of resetting itself when the heat in the area drops below the
detector's set point. - answerRestorable Heat Detector
Any alarm that occurs that is not the result of a potentially hazardous condition is known
as - answerUnwanted Alarm
smoke detectors must be functionally tested: - answerAnnually
smoke alarms or smoke detectors are requird at what locations? - answerIn each
sleeping room, outside each sleeping room, and on each level
A Class X circuit is a redundant pathway that only applies to addressable fire alarm
signaling device circuits.
T/F? - answerTRUE
When installing a smoke detector for door release service and the depth of the wall
above the door is greater than 24 inches on one side only, we must install _____
ceiling-mounted detector(s) on the higher side or ____ wall-mounted detector(s) (one on
each side of the doorway - answer1, 2
, During a power outage, the secondary power source for a smoke or heat alarm must be
capable of supplying power for 7 days in the normal condition.
T/F? - answerTRUE
Smoke detectors in elevator lobbies, hoistways or machine rooms can be used to
activate the elevator recall function. Other fire detectors may be permitted if ambient
conditions in those locations prohibit the use of smoke detectors.
T/F? - answerTrue
The location of remotely located power supplies shall be identified at the _____. -
answerMaster Control unit
For a ceiling height of 16 ft, we must multiply a heat detector' s listed spacing by what
factor? - answer0.77
Sensitivity testing for smoke detectors or smoke alarms are permitted to be conducted
with a small puff of aerosol without the use of test equipment.
T/F? - answerFalse
Where does the Ohio Fire Code require impairment tags to be placed on fire protection
systems? - answerFire alarm control unit
Smoke detectors must be visually inspected: - answerSemiannually
What chapter of NFPA 72 covers supervising station requirements? - answerChapter 26
A public mode audible signal shall have a sound level of at least ____ dBA above the
average ambient sound level or ____ dBA above the maximum sound level whichever
is greatest. - answer15,5
Audible alarm appliances must be tested with: - answerA sound pressure level
measurement device
Smoke detectors can only be tested using an aerosol if: - answerThe aerosol is
acceptable to the manufacturer
A fire alarm system for the private operating mode can be described as: - answerOnly
sounded at a constantly attended station to allow investigation and/or action by the
attendants
What is the maximum permitted spacing between two heat detectors when the
detectors have a listed spacing of 50 ft. and the ceiling height the detectors will be
mounted on has a height of 28 ft, 4 inches? - answer17 ft.
per ceiling height above 28 ft. and up to and including 30 ft., we must multiply the
detector's listed spacing by 0.34. 50- ft. spacing x 0.34 = 17 ft.
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