TFM 12 FIRE ALARM TECHNICAL EXAM
Questions and Answers
1. Does a fire hood system and a kitchen need to be monitored by
the fire alarm system?
Answer Yes
2. What does P.L.F.A stand for?
Answer Power Limited Fire Alarm
3. What does N.P.L.F.A stand for?
Answer Non-Power Limited Fire Alarm
4. 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.
5. What material must N.P.F.L.A circuit conductors be made from?
Answer ONLY solid stranded copper is permitted.
6. What does A.W.G stand for?
Answer American Wire Gauge
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,7. 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.
8. What is used to protect transformers or other devices supplied
from pow- er-supply conductors?
Answer An over-current device not rated over 20 amperes.
9. 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.
10. Single conductors shall not
be smaller than A.W.G?
Answer 18
11. 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
12. 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.
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, 13. What is Plenum cable?
Answer Cable that can be installed in ducts, plenums, or other spaces used for
environmental air.
14. What is a Riser cable?
Answer 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.
15. What is general purpose cable?
Answer 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.
16. Why 'type' shall plenum cable be? What substitutions are
allowed?
Answer Power Limited Fire Alarm Plenum (F.P.L.P) C.M.P can be substituted.
17. Why 'type' shall riser cable be? What substitutions are allowed?
Answer Power Limited Fire Alarm Riser (F.P.L.R) C.M.P, F.P.L.P.
C.M.R can be substituted.
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Questions and Answers
1. Does a fire hood system and a kitchen need to be monitored by
the fire alarm system?
Answer Yes
2. What does P.L.F.A stand for?
Answer Power Limited Fire Alarm
3. What does N.P.L.F.A stand for?
Answer Non-Power Limited Fire Alarm
4. 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.
5. What material must N.P.F.L.A circuit conductors be made from?
Answer ONLY solid stranded copper is permitted.
6. What does A.W.G stand for?
Answer American Wire Gauge
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,7. 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.
8. What is used to protect transformers or other devices supplied
from pow- er-supply conductors?
Answer An over-current device not rated over 20 amperes.
9. 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.
10. Single conductors shall not
be smaller than A.W.G?
Answer 18
11. 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
12. 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.
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, 13. What is Plenum cable?
Answer Cable that can be installed in ducts, plenums, or other spaces used for
environmental air.
14. What is a Riser cable?
Answer 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.
15. What is general purpose cable?
Answer 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.
16. Why 'type' shall plenum cable be? What substitutions are
allowed?
Answer Power Limited Fire Alarm Plenum (F.P.L.P) C.M.P can be substituted.
17. Why 'type' shall riser cable be? What substitutions are allowed?
Answer Power Limited Fire Alarm Riser (F.P.L.R) C.M.P, F.P.L.P.
C.M.R can be substituted.
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