Texas Fire Alarm Exam Prep Questions and Answers Verified 100% Correct

Texas Fire Alarm Exam Prep Questions and Answers Verified 100% Correct How should PLFA conductors NOT be installed? - ANSWER -PLFA conductors shall not be strapped, taped or attached to the exterior of any conduit or raceway. What is a Plenum cable? What are its characteristics? - ANSWER -Cable that can be installed in ducts, plenums or other spaces used for environmental air. It has adequate fire resistance and low smoke-producing characteristics. What is Riser cable? What are its characteristics? - ANSWER -Cable to be used in vertical wire runs in shafts or between floors. Not to be used where Plenum cable is required. It is capable of preventing fire from rising floor-to-floor. What is General Purpose cable? What are its characteristics? - ANSWER -Cable for general purpose fire alarm use. Not to be used where Plenum or Riser cable is required. It is resistant to the spread of fire. What 'type' shall plenum cable be? What substitutions are allowed'? - ANSWER Power Limited Fire Alarm Plenum (FPLP) CMP can be substituted. What 'type' shall riser wire be? What substitutions are permitted? - ANSWER Power Limited Fire Alarm Riser (FPLR) CMP, FPLP, CMR can be substituted. What 'type' shall general purpose wire be? What substitutions are permitted? - ANSWER -Power Limited Fire Alarm (FPL) CMP, FPLP, CMR, FPLR, CMG and CM can be substituted. (All types) What is the maximum voltage permitted through multi-conductor NPLFA cables? - ANSWER -150 volts What is the voltage rating of PLFA cables? - ANSWER -Not less than 300 volts Shall the voltage be marked on PLFA cables? - ANSWER -No, because they may be misinterpreted and used for electrical applications. What is a 'Rate Compensation Detector'? - ANSWER -A device that responds when the temperature reaches a pre-determined level. What is a 'Rate of Rise Detector'? - ANSWER -A device that responds when the temperature rises at a rate exceeding a pre-determined value. What is a 'Smoke Detector?' - ANSWER -A device that detects both visible and invisible combustion particles Which sensor is best at detecting 'invisible' smoke particles? - ANSWER Ionization Which sensor is best at detecting thick, 'visible' smoke particles? - ANSWER Photoelectric What is a 'Spot Type Detector'? - ANSWER -A device in which the detecting element is concentrated at a particular location. What is a 'Digital Alarm Communicator Receiver'? (DACR) - ANSWER -A system component that accepts and displays signals sent over the public phone network from a DACT. (I.e. ADT monitoring center) What is a 'Digital Alarm Communicator Transmitter? (DACT) - ANSWER -A system component at the protected premises is connected to the detection devices. It has line seizure and can connect to a OACR. (I.e. DSC Impassa) What is an Alarm Signal? - ANSWER -A signal indicating an emergency that requires IMMIDIATE action What is a Supervisory Signal? - ANSWER -A signal that indicates the need for action in connection with the SUPERVISION of fire equipment What is a Trouble Signal? - ANSWER -A signal that indicates a FAULT with fire equipment. It must have an audible signal, distinction from alarm signals. Does an exterior horn for a sprinkler system need to be supervised? - ANSWER Yes Does a fire hood sprinkler system in a kitchen need to be monitored by the fire alarm system? - ANSWER -Yes What is 'Cloud Chamber Smoke Detection'? - ANSWER -A detector that 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 'Ionization Smoke Detection'? - ANSWER -A detector that uses a small amount of radioactive 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 'Photoelectric Light-Scattering Smoke Detection'? - ANSWER -A detector that uses a light source and a photosensitive sensor, arranged so that light will only fall on the sensor when smoke particles arc present t. The particles reflect and retract light towards the sensor, tripping the alarm. What is important about the way trouble signals sound? - ANSWER -They must be distinctive from alarm sounds. What three procedures must be in place before it is permitted to install a means to silence trouble/supervisory/alarm signals? - ANSWER -1. The means shall be key operated and contained within a locked enclosure. 2. The means shall transfer its audible warning to a visual warning. (I.e. flashing lamp) 3. The audib1c trouble signal shall sound when the system is set to this 'silent' mode and no trouble or supervisory exists. Fire/ Supervisory signals shall be BLANK in sound from other signals and shall not be used for any other purpose. - ANSWER -Distinctive What code shall all wiring, cable and equipment be in accordance with? - ANSWER -NFPA 70 and the National electrical code. Specifically articles 760, 770 and 800. All systems shall test free of BLANK except for applications in which BLANK are approved. - ANSWER -Grounds, grounds So long as single open, ground or short circuit conditions do not affect the operation of equipment, what is not needed? - ANSWER -Monitoring for integrity. Such conditions must not prevent alarm, trouble or supervisory signals being sent.