TFM 12 Fire Alarm Technical Exam Correct 100%

Does a fire hood system and a kitchen need to be monitored by the fire alarm system? - ANSWERYes What does P.L.F.A stand for? - ANSWERPower Limited Fire Alarm What does N.P.L.F.A stand for? - ANSWERNon-Power Limited Fire Alarm What is the difference between P.F.L.A and N.P.F.L.A? - ANSWERan 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? - ANSWERONLY solid stranded copper is permitted. What does A.W.G stand for? - ANSWERAmerican Wire Gauge What size conductors are permitted? - ANSWERSize 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? - ANSWERAn over-current device not rated over 20 amperes. When located within 7 feet of the floor, how shall cables be fastened? - ANSWERCables 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? - ANSWER18 Conductors of 28 A.W.G shall only be permitted in which circumstance? - ANSWERSpliced with a connector listed as suitable for 26 to 24 A.W.G How shall P.F.L.A conductors NOT be installed? - ANSWERP.F.L.A conductors shall not be strapped, taped, or attached to the exterior of any conduit or raceway. What is Plenum cable? - ANSWERCable that can be installed in ducts, plenums, or other spaces used for environmental air. What is a Riser cable? - ANSWERCable 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? - ANSWERCable 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? - ANSWERPower Limited Fire Alarm Plenum (F.P.L.P) C.M.P can be substituted. Why 'type' shall riser cable be? What substitutions are allowed? - ANSWERPower 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? - ANSWERPower 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? - ANSWER150 volts What is the voltage rating marked on P.F.L.A cables? - ANSWERNot less than 300 volts Shall the voltage rating marked on P.F.L.A cables? - ANSWERNo, because they may be mistakenly used for electrical applications. What is 'Rate Compensation Detector'? - ANSWERA device that responds when a temperature rises at an exceeding rate that is predetermined. What is a 'Smoke Detector'? - ANSWERa device that detects both visible and invisible combustion particles? Which detector is best a detecting invisible particles? - ANSWERIonization Which sensor is better at detecting thick, visible smoke particles? - ANSWERPhotoelectric What is a SPOT TYPE sensor? - ANSWERa device in which detecting an element is concentrated at a particular location. What is a DIGITAL ALARM COMMUNICATOR TRANSMITTER ( D.A.C.T)? - ANSWERA 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)? - ANSWERA 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? - ANSWERA signal indicating an emergency that requires immediate action. What is a Supervisory signal? - ANSWERA signal that indicates the need for action in connection with the SUPERVISION of fire equipment. What is a Trouble signal? - ANSWERA 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? - ANSWERYes What is a Cloud Chamber Smoke detection? - ANSWERA 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. What is an Ionization Smoke detector? - ANSWERA detector that used a small amount of radio active material to ionize the air between two differently charged electrodes. When smoke is present between these electrodes, it causes the conductance of the air to decrease, and this causes the alarm to trip. What is Photo Electric Light Scattering Smoke Detection? - ANSWERA 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. What is important about the way trouble signals sound? - ANSWERThey must be distinctive from alarm signals. What three procedures must be in place before it is permitted to install a means to silence trouble/supervisory/alarm signals? - ANSWERThe means shall be key operated and contained within a locked enclosure The means shall transfer it's audible warning to a visual warning. The audible trouble signal shall sound when the system is set to silent mode and no trouble or supervisory exists. Fire/supervisory signals shall be ____ in sound from other signals and shall not be used for any other purpose. - ANSWERDistinctive What code shall all wiring, cable and equipment be in accordance with? - ANSWERNFPA 70, National Electric Code, Specifically articles 760, 770, and 800. All systems shall test free of _______, except for application in which _______ are approved. - ANSWERgrounds, grounds So long as a single open, ground, or short circuit conditioned do not affect the operation equipment, what is not needed? - ANSWERMonitoring for integrity, such conditions must not prevent alarm, trouble or supervisory signals being sent. If speakers are used to generate audible fire signals, What rule must apply? - ANSWERThe speaker must be monitored for integrity, and failure should result in a trouble signal. Where must a spot type heat and smoke sensors be located on walls and ceilings? - ANSWEROn the ceiling- not less than 4 inches from the sidewall. On the wall- between 4 inches and 12 inches from the ceiling. When more than one detector is used on a ceiling, what spacing measurement shall be used? - ANSWERAll points shall have a detector equal to 0.7 times the listed spacing. When water flow occurs that is equal or greater than the flow of a single sprinkler, how quickly shall the alarm signal initiate? - ANSWERWithin 90 seconds Can detectors be installed within an air duct system? Can they be used as a substitute for open area protection? - ANSWERYes and No Detectors shall be ________ for the purpose for which they are being used. - ANSWERListed (i.e zone listed) Which signals must take priority over all other signals? - ANSWERFire. Even if a non fire signal is generated first.