Exam (elaborations)
TFM 12 Fire Alarm Technical Exam Questions with Correct Answers
TFM 12 Fire Alarm Technical Exam Questions with Correct Answers
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TFM 12 Fire Alarm Technical Exam Questionswith Correct Answers
Does a fire hood system and a kitchen need to be monitored by the fire
alarm system? - -Yes
-What does P.L.F.A stand for? - -Power Limited Fire Alarm
-What does N.P.L.F.A stand for? - -Non-Power Limited Fire Alarm
-What is the difference between P.F.L.A and N.P.F.L.A? - -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? - -ONLY
solid stranded copper is permitted.
-What does A.W.G stand for? - -American Wire Gauge
-What size conductors are permitted? - -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? - -An over-current device not rated over 20 amperes.
-When located within 7 feet of the floor, how shall cables be fastened? - -
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? - -18
-Conductors of 28 A.W.G shall only be permitted in which circumstance? - -
Spliced with a connector listed as suitable for 26 to 24 A.W.G
-How shall P.F.L.A conductors NOT be installed? - -P.F.L.A conductors shall
not be strapped, taped, or attached to the exterior of any conduit or
raceway.
-What is Plenum cable? - -Cable that can be installed in ducts, plenums, or
other spaces used for environmental air.
-What is a Riser cable? - -Cable 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? - -Cable 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? - -Power
Limited Fire Alarm Plenum (F.P.L.P) C.M.P can be substituted.
-Why 'type' shall riser cable be? What substitutions are allowed? - -Power
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? - -Power 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? - -150 volts
-What is the voltage rating marked on P.F.L.A cables? - -Not less than 300
volts
-Shall the voltage rating marked on P.F.L.A cables? - -No, because they may
be mistakenly used for electrical applications.
-What is 'Rate Compensation Detector'? - -A device that responds when a
temperature rises at an exceeding rate that is predetermined.
-What is a 'Smoke Detector'? - -a device that detects both visible and
invisible combustion particles?
-Which detector is best a detecting invisible particles? - -Ionization
-Which sensor is better at detecting thick, visible smoke particles? - -
Photoelectric
-What is a SPOT TYPE sensor? - -a device in which detecting an element is
concentrated at a particular location.
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