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TFM 12 Fire Alarm Technical Exam Questions with Verified Solutions. $17.99   Add to cart

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TFM 12 Fire Alarm Technical Exam Questions with Verified Solutions.

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TFM 12 Fire Alarm Technical Exam Questions with Verified Solutions.TFM 12 Fire Alarm Technical Exam Questions with Verified Solutions.

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  • April 3, 2024
  • 7
  • 2023/2024
  • Exam (elaborations)
  • Questions & answers
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TFM 12 Fire Alarm Technical Exam Questions with
Verified Solutions.
Does a fire hood system and a kitchen need to be monitored by the fire alarm system? -
ANS Yes

What does P.L.F.A stand for? - ANS Power Limited Fire Alarm

What does N.P.L.F.A stand for? - ANS Non-Power Limited Fire Alarm

What is the difference between P.F.L.A and N.P.F.L.A? - ANS 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? - ANS ONLY solid stranded
copper is permitted.

What does A.W.G stand for? - ANS American Wire Gauge

What size conductors are permitted? - ANS 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? - 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 28 A.W.G shall only be permitted in which circumstance? - ANS Spliced with
a connector listed as suitable for 26 to 24 A.W.G

How shall P.F.L.A conductors NOT be installed? - ANS P.F.L.A conductors shall not be
strapped, taped, or attached to the exterior of any conduit or raceway.

What is Plenum cable? - ANS Cable that can be installed in ducts, plenums, or other spaces
used for environmental air.

What is a Riser cable? - ANS 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? - ANS 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? - ANS Power Limited Fire
Alarm Plenum (F.P.L.P) C.M.P can be substituted.


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, Why 'type' shall riser cable be? What substitutions are allowed? - ANS 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? - ANS 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? - ANS
150 volts

What is the voltage rating marked on P.F.L.A cables? - ANS Not less than 300 volts

Shall the voltage rating marked on P.F.L.A cables? - ANS No, because they may be
mistakenly used for electrical applications.

What is 'Rate Compensation Detector'? - ANS A device that responds when a temperature
rises at an exceeding rate that is predetermined.

What is a 'Smoke Detector'? - ANS a device that detects both visible and invisible
combustion particles?

Which detector is best a detecting invisible particles? - ANS Ionization

Which sensor is better at detecting thick, visible smoke particles? - ANS Photoelectric

What is a SPOT TYPE sensor? - ANS a device in which detecting an element is
concentrated at a particular location.

What is a DIGITAL ALARM COMMUNICATOR TRANSMITTER (D.A.C.T)? - ANS A 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.

What is a DIGITAL ALARM COMMUNICATOR RECEIVER? (D.A.C.R)? - ANS A system
component that accepts and displays signals sent over the public phone network from a
D.A.C.T (i.e. A.D.T monitoring center)

What is an alarm signal? - ANS A signal indicating an emergency that requires immediate
action.

What is a Supervisory signal? - ANS A signal that indicates the need for action in connection
with the SUPERVISION of fire equipment.

What is a Trouble signal? - ANS A signal that indicates a fault with the fire equipment. It
must have an audible signal, distinctive from alarm signals.

Does an exterior harm for a sprinkler system need to be supervised? - ANS Yes

What is a Cloud Chamber Smoke detection? - ANS A detector draws an air sample into a
high humidity, low pressure chamber. The conditions in the chamber cause the moisture in
the air to condense on the smoke particles, forming a cloud. The density of this cloud is
measured by a photoelectric principle, if it meets a certain criteria, an alarm is generated.

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