Exam (elaborations)
TFM 12 2023/2024 already graded A+
- Course
- Institution
TFM 12 2023/2024 already graded A+
[Show more]
Content preview
TFM 12What does PLFA stand for? - ANSPower Limited Fire Alarm
What does NPLFA stand for? - ANSNon-Power Limited Fire Alarm
What material must NPLFA circuit conductors be made from? - ANSSolid or stranded copper
What is a single station detector? - ANSBattery powered smoke detectors that do not
communicate off premises.
What is a multiple station detector? - ANSMains powered smoke detectors with battery backup
that are linked together, so that if one unit initiates, alarms in all detectors will sound. They do
not communicate off premises.
How frequently must household single and multiple station detectors be inspected and tested? -
ANSIn accordance with the manufacturers recommendations, at least monthly
How frequently must household fire alarm systems be inspected and tested? - ANSAt least
every 3 years, by a qualified service technician.
What does 'restorable' mean? - ANSThe detector can be 'restored' or 'reused' after it has
initiated an alarm.
What size conductors are permitted? - ANSSize 18AWG and 16AWG
What is used to protect transformers or other devices supplied from power-supply conductors? -
ANSAn overcurrent device not rated over 20 Amperes.
When located within 7ft of the floor, how shall cables be fastened? - ANSCables shall be
fastened in an approved manner at intervals of not more than 18 inches.
Single conductors shall not be smaller than __________ AWG - ANS18
Conductors of 26AWG shall only be permitted in which circumstances? - ANSWhere spliced
with a connector listed as suitable for 26 to 24 AWG
What is a Plenum cable? - ANSCable that can be installed in ducts and other spaces used for
environmental air.
What is Riser cable? - ANSCable to be used in vertical wire runs in shafts or between floors.
, What is General Purpose cable? - ANSCable for general purpose fire alarm use
What 'type' shall plenum cable be? What substitutions are allowed? - ANSFPLP
What 'type' shall riser wire be? What substitutions are permitted? - ANSFPLR
What 'type' shall general purpose wire be? What substitutions are permitted? - ANSFPL
What is the maximum voltage permitted through multi-conductor NPLFA cables? - ANS150 volts
What is the voltage rating of PLFA cables? - ANSNot less than 300 volts
Shall the voltage be marked on PLFA cables? - ANSNO
What is a 'Rate Compensation Detector'? - ANSA device that responds when the temperature
reaches a pre-determined level.
What is a 'Rate of Rise Detector'? - ANSA device that responds when the temperature rises at a
rate exceeding a pre-determined value
Which sensor is best at detecting 'invisible' smoke particles? - ANSIonization
Which sensor is best at detecting thick, 'visible' smoke particles? - ANSPhotoelectric
What is a 'Spot Type Detector'? - ANSA device in which the detecting element is concentrated
at a particular location.
What is a 'Digital DACR? - ANSDigital alarm communicator Receiver
Name a DACR - ANSImpassa
What is an Alarm Signal? - ANSA signal indicating an emergency that requires IMMEDIATE
action
Does an exterior horn for a sprinkler system need to be supervised? - ANSYES
Does a fire hood sprinkler system in a kitchen need to be monitored by the fire alarm system? -
ANSYES
What is 'Photoelectric Light-Scattering Smoke Detection'? - ANSA detector that uses a light
source and a photosensitive sensor, arranged so that light will only fall on the sensor when
smoke particles are present. The particles reflect and retract light towards the sensor, tripping
the alarm.
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller Ashley96. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $9.99. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
76449 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now