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TFM 12 Fire Alarm Technical Questions and Answers Fully Solved
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TFM 12 Fire Alarm Technical
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TFM 12 Fire Alarm TechnicalDoes a fire hood system and a kitchen need to be monitored by the fire alarm system? -
answer Yes
What does P.L.F.A stand for? - answer Power Limited Fire Alarm
What does N.P.L.F.A stand for? - answer on-Power Limited Fire Alarm
What is the difference between P.F.L.A and N.P.F.L.A? - answer an N.P.L.F.A can
operate at up to 600v, and the power output isn't limited
a P.L.F.A has the voltage and power limited by a listed power source.
What material must N.P.F.L.A circuit conductors be made from? - answer ONLY solid
stranded copper is permitted.
What does A.W.G stand for? - answer American Wire Gauge
What size conductors are permitted? - answer Size 18 A.W.G and 16 A.W.G are
permitted, provided they do not exceed certain capacities.
What is used to protect transformers or other devices supplied from power-supply
conductors? - answer An over-current device not rated over 20 amperes.
When located within 7 feet of the floor, how shall cables be fastened? - answer 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? - answer18
Conductors of 28 A.W.G shall only be permitted in which circumstance? - answer
Spliced with a connector listed as suitable for 26 to 24 A.W.G
How shall P.F.L.A conductors NOT be installed? – answer P.F.L.A conductors shall not
be strapped, taped, or attached to the exterior of any conduit or raceway.
What is Plenum cable? - answer Cable that can be installed in ducts, plenums, or other
spaces used for environmental air.
What is a Riser cable? - answerCable to be used in vertical wire runs in shafts between
floors. Not to be used where Plenum cable is required.
, It is capable of preventing fire from rising from floor to floor.
What is general purpose cable? - answerCable for general purpose fire alarm use. Not
to be used where plenum cable or riser cable is required.
It is resistant to the spread of fire.
Why 'type' shall plenum cable be? What substitutions are allowed? - answerPower
Limited Fire Alarm Plenum (F.P.L.P) C.M.P can be substituted.
Why 'type' shall riser cable be? What substitutions are allowed? - answerPower Limited
Fire Alarm Riser (F.P.L.R) C.M.P, F.P.L.P.
C.M.R can be substituted.
What 'type' shall general purpose wire be? What substitutions are permitted? -
answerPower Limited Fire Alarm (F.P.L) C.M.P, F.P.L.P, C.M.R, F.P.L.R, C.M.G
CM can be substituted (all types)
What is the maximum voltage permitted through multi-conductor N.P.F.L.A cables? -
answer150 volts
What is the voltage rating marked on P.F.L.A cables? - answerNot less than 300 volts
Shall the voltage rating marked on P.F.L.A cables? - answerNo, because they may be
mistakenly used for electrical applications.
What is 'Rate Compensation Detector'? - answerA device that responds when a
temperature rises at an exceeding rate that is predetermined.
What is a 'Smoke Detector'? - answera device that detects both visible and invisible
combustion particles?
Which detector is best a detecting invisible particles? - answerIonization
Which sensor is better at detecting thick, visible smoke particles? - answerPhotoelectric
What is a SPOT TYPE sensor? - answera device in which detecting an element is
concentrated at a particular location.
What is a DIGITAL ALARM COMMUNICATOR TRANSMITTER ( D.A.C.T)? - answerA
system component at the protected premises is connected to the detection devices. It
has a line seizure and can connect to a D.A.C.R.
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