Communication and Signal Systems Overview
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Questions and Answers

What type of detector is commonly known as a 'Thermostat'?

  • Smoke Detector
  • Photoelectric Detector
  • Temperature Detector (correct)
  • Infrared Detector
  • Which detector type is most effective in areas where fires produce significant smoke and gas?

  • Fixed Temperature Detector
  • Rate-of-Rise Detector
  • Heat Detector
  • Photoelectric Detector (correct)
  • What is a characteristic feature of the Fixed Temperature Unit in heat detectors?

  • It resets automatically after activation.
  • It activates based on unexpected temperature rise.
  • It is designed for high ambient temperature areas only.
  • It triggers contacts when a specific temperature is reached. (correct)
  • Which component of a fire alarm system is responsible for processing information and coordination of alarms?

    <p>Control Unit or Panel (B)</p> Signup and view all the answers

    In terms of location, how are temperature detectors rated for ordinary rooms?

    <p>At 135°F per 200 sqft (B)</p> Signup and view all the answers

    Which type of smoke detector uses the obscuration of a light beam as its detection method?

    <p>Photoelectric Detector (B)</p> Signup and view all the answers

    What is the primary function of alarm devices in fire detection systems?

    <p>To alert and warn building occupants (C)</p> Signup and view all the answers

    Rate-of-Rise Units in heat detectors are designed to activate based on what criterion?

    <p>Rate of ambient temperature increase (C)</p> Signup and view all the answers

    What is a characteristic of a Zone Coded System in fire alarm panels?

    <p>It can identify manual stations through coded alarms. (D)</p> Signup and view all the answers

    How does a Dual Coded System function in fire alarms?

    <p>It combines identifying coded alarms and continuous evacuation alarms. (C)</p> Signup and view all the answers

    Which system allows for selective alerting of key personnel?

    <p>Pre-signal System (D)</p> Signup and view all the answers

    What is the main feature of a General and Selective Coded System?

    <p>All manual and automatic devices can trip transmitters. (A)</p> Signup and view all the answers

    What does a Pre-signal System enable personnel to do during a fire alarm?

    <p>Personnel can investigate and manually activate the general alarm. (A)</p> Signup and view all the answers

    Which type of fire alarm system requires manual activation?

    <p>Manual System (D)</p> Signup and view all the answers

    What distinguishes coded manual stations from non-coded stations?

    <p>Coded stations are easier to identify at the control panel. (C)</p> Signup and view all the answers

    The function of the control unit panel in a fire alarm system includes all of the following except:

    <p>Dispensing water automatically (B)</p> Signup and view all the answers

    Which alarm type is characterized by a rhythmic ringing at 108 strokes per minute?

    <p>Master Coded Systems (C)</p> Signup and view all the answers

    Sprinkler systems in fire detection are controlled through which component?

    <p>Sprinkler Control Panel (A)</p> Signup and view all the answers

    What is a characteristic of non-coded systems used in fire alarms?

    <p>They support zoning and identification. (D)</p> Signup and view all the answers

    Which system combines both manual and automatic activation methods?

    <p>Combination Manual and Automatic System (B)</p> Signup and view all the answers

    Which component must be serviced with an emergency standby battery for fire alarms?

    <p>Control Unit Panel (D)</p> Signup and view all the answers

    Flashcards

    Fire Alarm System Types

    Fire alarm systems are categorized into manual, automatic, and combination systems.

    Manual Fire Alarm System

    A fire alarm system triggered manually by activating a station.

    Automatic Fire Alarm System

    A fire alarm system triggered automatically by fire detectors.

    Sprinkler Alarm System

    A fire suppression system using sprinkler heads to automatically dispense water.

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    Control Unit Panel (Fire Alarm)

    The central component of a fire alarm system that activates alarm devices and controls other functions.

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    Non-coded Manual Stations

    Manual fire alarm stations without unique identification at the control panel.

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    Master Coded System

    A fire alarm system with unique codes for each station, often with specific alarm sounds.

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    March Time Alarm

    A rapid evacuation alarm characterized by a rhythmic cadence.

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    Fire Detection Alarm System

    A system designed to detect fire, by recognizing products of combustion like smoke, heat, or light giving early warnings to occupants .

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    Temperature Detector (Heat Detector)

    A fire detector that triggers based on changes in temperature reaching a specific threshold.

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    Fixed Temperature Unit

    A temperature detector that activates when the surrounding temperature reaches a pre-set limit.

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    Rate-of-Rise Unit

    A temperature detector that activates when the rate at which the temperature rises is too high, usually used in combination with fixed temperature units.

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    Photoelectric Detector

    A fire detector that detects smoke by sensing the interruption of a light beam caused by smoke particles.

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    Smoke Detector

    A type of fire detector that uses light beams to detect smoke particles, useful for fires with significant smoke.

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    Thermostat

    A type of fixed temperature unit, commonly used in fire detection systems.

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    Fire Detection System Parts

    Typically includes detectors, a control unit/panel, alarm devices, and wiring/circuitry to establish communication and alert occupants.

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    Zone Coded System

    A fire alarm system where manual stations are grouped into zones. Each zone is assigned a unique code that is transmitted to the control panel when activated. This allows immediate identification of the station in trouble.

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    Dual Coded Systems

    A fire alarm system that combines the features of non-coded and zone-coded systems. It activates two distinct alarms: a coded alarm for specific locations and a continuous ringing alarm for the whole building.

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    General and Selective Coded System

    A fully coded fire alarm system where both manual and automatic devices have unique codes. This system provides detailed information about the type and location of the fire alarm.

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    Pre-signal System

    A fire alarm system used to alert only key personnel. It involves a selective coded alarm, which allows for immediate investigation and manual activation of the general alarm.

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    What type of system uses a continuous ringing evacuation alarm for the whole building?

    Dual Coded Systems activate a continuous ringing evacuation alarm in addition to a coded alarm for specific locations. This ensures that all occupants are alerted to evacuate.

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    Study Notes

    Communication and Signal Systems

    • All signal systems require a surveillance system to process information, including the transmission of signals, and a way to indicate the signals, such as visually, audibly, or on permanent records.

    Types of Communication and Signal Systems

    • Fire Detection Alarm System: Detects fire products such as smoke, heat, and light, providing early notification for occupant safety. Utilizes various methods, like heat/smoke detectors, to alert occupants to a fire.

    • Building Security Systems: Include intruder detection, building access, and CCTV.

    • Audio and Visual Telecommunication Systems: Comprises telephone, intercom, and public television equipment.

    • Time Equipment: Incorporates clock and program equipment.

    Fire Detection and Alarm Systems

    • Detects: Products of combustion (smoke, heat, light).

    • Methods: Utilizing various heat and smoke detection techniques.

    • Alerting: Includes audible and visual alarms.

    • Components:

    • Detectors: Detect fire products.

    • Control Unit/Panel: Manages the system.

    • Alarm Devices: Provide signals (audible and visual).

    • Wiring/Circuitry: Connects all components.

    Detectors

    • Types of Temperature (Heat) Detectors:

    • Fixed Temperature: Contacts trigger when a set temperature is reached.

    • Rate-of-Rise: Activates when the rate of temperature change exceeds a set value.

    • Combinations: Combined units with both features.

    • Types of Smoke Detectors (Photoelectric):

    • Photoelectric: Reacts to the obscuring of a light beam by smoke.

    • Types of Smoke Detectors (Ionization):

    • Ionization: Detects ionized particles in the air.

    • Flame Detectors (Types):

    • Infrared (IR): Detects rapid flaming combustion and CO2 production. Used in enclosed spaces, like storage areas, and has less sensitivity

    • Ultraviolet (UV): Useful for detecting UV radiation, such as from walls and ceilings

    • Combined UV/IR: Combines both technologies.

    Alarm Systems

    • Manual Pull Station: Lever-like devices mounted in strategic locations that activate an alarm when pulled.

    • Emergency Voice Communication System: Uses pre-programmed recorded messages to provide guidance in emergencies.

    • Alarm System: Consists of devices that create audible signals (bells, buzzers, strobes etc.) and external bells for notifying others of a fire.

    • Types of Alarm Systems

    • Manual: Use a trigger to activate.

    • Non-coded manual stations: stations aren't identifiable at the control panel

    • Coded manual stations: stations have codes received at the control panel

    • Automatic: Use detectors to trigger the alarm

    • Combination of both.

    • Control Unit Panel Typical Functions:

    • Non-coded: Continuous ringing of alarm, zoned (identifiable) by annunciator.

    • Master Coded: Rhythmic cadence ("march time") alarm.

    • Zone Coded: Zoned alarm with single-stroke gong, indicating station.

    • Dual Coded: Combination of non- and zone-coded systems with multiple functions.

    • General/Selective Coded: Fully coded manual and automatic devices, triggering code transmitters at the control panel.

    • Pre-signal: System designed to alert specific personnel and turning on the general alarm manually.

    Sprinkler Alarm System

    • Consists of sprinkler heads, network of pipes, dispensed water when fire detected.

    Control Unit Panel

    • Function: Energizes audible devices (bells, buzzers, gongs) upon alarm signal receipt, and may include other functions like shutting off utilities or lights to prevent fire spread. -Servicing: Emergency standby batteries. Interfaced with building management systems (BMS).

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    Description

    This quiz covers the essential types of communication and signal systems, including fire detection alarm systems, building security systems, and telecommunication solutions. Explore how these systems function, their detection methods, and the importance of alerting mechanisms. Test your understanding of how these systems enhance safety and security.

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