TFM 12 Fire Alarm Technical Questions
with Correct Answers
Does a fire hood system and a kitchen need to be monitored by the fire alarm system? -
ANSWERSYes
What does P.L.F.A stand for? - ANSWERSPower Limited Fire Alarm
What does N.P.L.F.A stand for? - ANSWERSNon-Power Limited Fire Alarm
What is the difference between P.F.L.A and N.P.F.L.A? - ANSWERSan 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? - ANSWERSONLY
solid stranded copper is permitted.
What does A.W.G stand for? - ANSWERSAmerican Wire Gauge
What size conductors are permitted? - ANSWERSSize 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? - ANSWERSAn over-current device not rated over 20 amperes.
When located within 7 feet of the floor, how shall cables be fastened? -
ANSWERSCables 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? - ANSWERS18
Conductors of 28 A.W.G shall only be permitted in which circumstance? -
ANSWERSSpliced with a connector listed as suitable for 26 to 24 A.W.G
How shall P.F.L.A conductors NOT be installed? - ANSWERSP.F.L.A conductors shall
not be strapped, taped, or attached to the exterior of any conduit or raceway.
What is Plenum cable? - ANSWERSCable that can be installed in ducts, plenums, or
other spaces used for environmental air.
What is a Riser cable? - ANSWERSCable 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? - ANSWERSCable 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? - ANSWERSPower
Limited Fire Alarm Plenum (F.P.L.P) C.M.P can be substituted.
Why 'type' shall riser cable be? What substitutions are allowed? - ANSWERSPower
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? -
ANSWERSPower 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? -
ANSWERS150 volts
What is the voltage rating marked on P.F.L.A cables? - ANSWERSNot less than 300
volts
Shall the voltage rating marked on P.F.L.A cables? - ANSWERSNo, because they may
be mistakenly used for electrical applications.
What is 'Rate Compensation Detector'? - ANSWERSA device that responds when a
temperature rises at an exceeding rate that is predetermined.
What is a 'Smoke Detector'? - ANSWERSa device that detects both visible and invisible
combustion particles?
Which detector is best a detecting invisible particles? - ANSWERSIonization
Which sensor is better at detecting thick, visible smoke particles? -
ANSWERSPhotoelectric
What is a SPOT TYPE sensor? - ANSWERSa device in which detecting an element is
concentrated at a particular location.
with Correct Answers
Does a fire hood system and a kitchen need to be monitored by the fire alarm system? -
ANSWERSYes
What does P.L.F.A stand for? - ANSWERSPower Limited Fire Alarm
What does N.P.L.F.A stand for? - ANSWERSNon-Power Limited Fire Alarm
What is the difference between P.F.L.A and N.P.F.L.A? - ANSWERSan 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? - ANSWERSONLY
solid stranded copper is permitted.
What does A.W.G stand for? - ANSWERSAmerican Wire Gauge
What size conductors are permitted? - ANSWERSSize 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? - ANSWERSAn over-current device not rated over 20 amperes.
When located within 7 feet of the floor, how shall cables be fastened? -
ANSWERSCables 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? - ANSWERS18
Conductors of 28 A.W.G shall only be permitted in which circumstance? -
ANSWERSSpliced with a connector listed as suitable for 26 to 24 A.W.G
How shall P.F.L.A conductors NOT be installed? - ANSWERSP.F.L.A conductors shall
not be strapped, taped, or attached to the exterior of any conduit or raceway.
What is Plenum cable? - ANSWERSCable that can be installed in ducts, plenums, or
other spaces used for environmental air.
What is a Riser cable? - ANSWERSCable 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? - ANSWERSCable 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? - ANSWERSPower
Limited Fire Alarm Plenum (F.P.L.P) C.M.P can be substituted.
Why 'type' shall riser cable be? What substitutions are allowed? - ANSWERSPower
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? -
ANSWERSPower 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? -
ANSWERS150 volts
What is the voltage rating marked on P.F.L.A cables? - ANSWERSNot less than 300
volts
Shall the voltage rating marked on P.F.L.A cables? - ANSWERSNo, because they may
be mistakenly used for electrical applications.
What is 'Rate Compensation Detector'? - ANSWERSA device that responds when a
temperature rises at an exceeding rate that is predetermined.
What is a 'Smoke Detector'? - ANSWERSa device that detects both visible and invisible
combustion particles?
Which detector is best a detecting invisible particles? - ANSWERSIonization
Which sensor is better at detecting thick, visible smoke particles? -
ANSWERSPhotoelectric
What is a SPOT TYPE sensor? - ANSWERSa device in which detecting an element is
concentrated at a particular location.
