Key Terms in Fire Alarm Systems
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Questions and Answers

What does AHJ stand for?

  • Authority Having Jurisdiction (correct)
  • Alarm Handling Job
  • Automatic High Jumper
  • Alarm Hazard Junction

What is an addressable device in a fire alarm system?

A fire alarm system component with discrete identification that can have its status individually identified or used to control other functions.

What are adverse conditions in relation to fire alarms?

Any condition occurring in communications or transmission of status change signals at a supervising station.

What is an auxiliary alarm box?

<p>An alarm box that can only be operated from one or more initiating devices or an auxiliary alarm system used to send an alarm.</p> Signup and view all the answers

What is a Manual Fire Alarm Box?

<p>A manually operated device used to initiate a fire alarm signal.</p> Signup and view all the answers

What methods does an alarm system use?

<p>Methods of alerting people to potential dangers.</p> Signup and view all the answers

Describe the Alarm Verification Feature.

<p>A feature that reduces unwanted alarms by requiring smoke detectors to confirm alarm conditions over a set period.</p> Signup and view all the answers

What is Annunciation in fire alarm systems?

<p>A unit containing indicators that provide status information about a circuit, condition, or location.</p> Signup and view all the answers

What is an Audible Notification Appliance?

<p>Approved sounding devices like horns, bells, or speakers indicating a fire or emergency condition.</p> Signup and view all the answers

What defines a ceiling in the context of fire alarms?

<p>The upper surface of a space, regardless of height.</p> Signup and view all the answers

What is a sloping ceiling?

<p>A ceiling that has a slope of more than 1 in 8.</p> Signup and view all the answers

What characterizes a smooth ceiling?

<p>A smooth ceiling is uninterrupted by continuous projections such as solid joists or beams extended more than 4 inches below the ceiling surface.</p> Signup and view all the answers

What is a central station in fire alarm systems?

<p>An off-premises facility that monitors alarm systems and notifies the fire department.</p> Signup and view all the answers

What does a circuit refer to in fire alarm terminology?

<p>A means of providing power or a connection path between locations.</p> Signup and view all the answers

What are Cloud Chamber Smoke Detectors?

<p>A type of air-sampling detector capable of detecting microscopic particles of smoke.</p> Signup and view all the answers

What is the function of a coded alarm signal?

<p>An audible or visible signal that conveys several discrete bits of information.</p> Signup and view all the answers

Define a Combination Detector.

<p>A device that responds to more than one fire condition or employs multiple operating principles.</p> Signup and view all the answers

What is meant by abnormal (off-normal) condition?

<p>A situation, environmental state, or equipment state that demands a signal, notification, or action.</p> Signup and view all the answers

What constitutes an Alarm Condition?

<p>An abnormal condition that poses an immediate threat to life, property, or mission.</p> Signup and view all the answers

What is a Pre-Alarm Condition?

<p>An abnormal condition that poses an immediate threat to life or property but time is available for intervention.</p> Signup and view all the answers

Define a supervisory condition.

<p>An abnormal condition related to the supervision of other systems, processes, or equipment.</p> Signup and view all the answers

What is a Trouble Condition?

<p>An abnormal condition in a system due to a fault.</p> Signup and view all the answers

What does a control unit do in a fire alarm system?

<p>It monitors inputs and controls outputs through various types of circuits.</p> Signup and view all the answers

What is the purpose of a Fire Alarm Control Panel (FACP)?

<p>A system component that processes signals from initiating devices and activates outputs.</p> Signup and view all the answers

What is a detector in fire alarms?

<p>A device that responds to a physical stimulus such as gas, heat, or smoke.</p> Signup and view all the answers

What is the Air Sampling-Type Detector?

<p>A detector that consists of a piping or tubing network running to the area to be protected.</p> Signup and view all the answers

What are heat detectors?

<p>Devices that detect fires by sensing significant increases in temperature.</p> Signup and view all the answers

Describe what a Line-Type Detector is.

<p>A device in which detection is continuous along a path.</p> Signup and view all the answers

What does a Rate Compensation Detector do?

<p>Responds when the temperature reaches a predetermined level, regardless of temperature rise rate.</p> Signup and view all the answers

What triggers a Rate of Rise detector?

<p>Responds when the temperature rises at a rate exceeding a predetermined value.</p> Signup and view all the answers

What is a smoke detector?

<p>An alarm-initiating device designed to actuate when detecting combustion products.</p> Signup and view all the answers

What is a Spot-Type Detector?

<p>A detection device that provides coverage in a specific area with a fixed sensing element.</p> Signup and view all the answers

Define a Digital Alarm Communicator Transmitter (DACT).

<p>A device that takes output signals from the fire alarm system and encodes them for transmission.</p> Signup and view all the answers

What is a Digital Alarm Communicator Receiver (DACR)?

<p>A device that receives, decodes, and communicates signals from a DACT.</p> Signup and view all the answers

Describe a Dwelling Unit.

<p>One or more rooms arranged for complete, independent housekeeping purposes.</p> Signup and view all the answers

What is a household fire alarm system?

<p>A system of devices using a fire alarm control unit to produce an alarm signal in a household.</p> Signup and view all the answers

What is a protected premises fire alarm system?

<p>A fire alarm system located at the protected premises.</p> Signup and view all the answers

What is an initiating device?

<p>A component that originates transmission of a change-of-state condition.</p> Signup and view all the answers

What is a Nonrestorable Initiating Device?

<p>A device in which the sensing element is destroyed during operation.</p> Signup and view all the answers

What is a Restorable Initiating Device?

<p>A device where the sensing element is not ordinarily destroyed, allowing restoration.</p> Signup and view all the answers

What defines an Ionization smoke detector?

<p>A type of smoke detector using a small amount of radioactive material to detect smoke.</p> Signup and view all the answers

What is a Mass Notification System (MNS)?

<p>A system that notifies occupants of a dangerous situation with information and instructions.</p> Signup and view all the answers

Describe a Multiple Station Alarm.

<p>An alarm system where all detectors are interconnected for simultaneous notifications.</p> Signup and view all the answers

What is Multiplexing?

<p>A form of transmission that allows multiple signals to travel simultaneously over a circuit.</p> Signup and view all the answers

What are Notification Appliances?

<p>Audible notifications like bells, horns, and chimes; visible notifications like strobes.</p> Signup and view all the answers

What is a visible notification appliance?

<p>A notification appliance that alerts by the sense of sight.</p> Signup and view all the answers

What is a signal in fire alarm systems?

<p>An indication of a condition communicated by electrical, audible, or other means.</p> Signup and view all the answers

What is an alarm signal?

<p>A signal that results from the manual or automatic detection of an alarm condition.</p> Signup and view all the answers

Define Fire Alarm Signal.

<p>A signal resulting from the manual or automatic detection of a fire alarm condition.</p> Signup and view all the answers

What is a Supervisory Signal?

<p>A signal resulting from the detection of a supervisory condition indicating the need for action.</p> Signup and view all the answers

Describe a Trouble Signal.

<p>A signal that results from detecting a trouble condition.</p> Signup and view all the answers

What is a Signaling Line Circuit (SLC)?

<p>A circuit path between any combination of addressable appliances or devices.</p> Signup and view all the answers

What are Photoelectric light-scattering smoke detectors?

<p>Sensors that detect smoke by scattering light particles with smoke presence.</p> Signup and view all the answers

What is an unwanted alarm?

<p>Any alarm that occurs not due to a hazardous condition.</p> Signup and view all the answers

Define a Nuisance Alarm.

<p>An unwanted activation of a signaling system not resulting from a hazardous condition.</p> Signup and view all the answers

What are malicious alarms?

<p>Unwanted activation of an alarm caused by a person acting with malice.</p> Signup and view all the answers

What is a zone in fire alarm terminology?

<p>A defined area within the protected premises.</p> Signup and view all the answers

What is a notification zone?

<p>A discrete area of a building bound by fire safety subdivisions for receiving notifications.</p> Signup and view all the answers

Flashcards

AHJ (Authority Having Jurisdiction)

The organization responsible for enforcing building codes and standards related to fire safety.

Addressable Device

A fire alarm component uniquely identified for controlling specific functions and monitoring its status.

Adverse Conditions

Conditions hindering communication and interpretation of alarm signals at the supervising station.

Auxiliary Alarm Box

An alarm box activated by initiating devices or another system to alert a communications center.

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Manual Fire Alarm Box

A device manually activated to initiate a fire alarm signal.

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Alarm System

Systems designed to warn individuals about potential fire hazards.

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Alarm Verification Feature

A system feature verifying an alarm condition over time to minimize false alarms.

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Annunciation

A device displaying status information about circuits or locations within the fire alarm system.

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Audible Notification Appliance

Devices like horns and bells that signal fire or emergency situations.

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Ceiling

The upper surface of a space; in spaces with suspended ceilings, there are two.

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Sloping Ceiling

A ceiling with a slope greater than 1 in 8.

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Smooth Ceiling

A ceiling without continuous projections extending more than 4 inches below the surface.

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Central Station

A facility that monitors alarm systems remotely and notifies the fire department.

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Detector

A device that responds to physical stimuli like smoke, heat, or gas.

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Heat Detectors

A detector triggered by significant temperature increases or rates of temperature rise.

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Smoke Detector

A device that initiates alarms in response to visible or invisible combustion products.

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Combination Detector

A device that can detect multiple fire conditions or utilizes more than one detection principle.

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Air Sampling-Type Detector

Uses a network to continuously sample air for smoke particles.

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Alarm Condition

Indicates an immediate threat to life or property.

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Pre-Alarm Condition

Indicates a potential threat allowing time for intervention.

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Supervisory Condition

Abnormal situations requiring supervision of other systems or equipment.

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Trouble Condition

Any system fault that creates an abnormal state.

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Nuisance Alarm

An alarm triggered without a real hazard.

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Malicious Alarms

Alarm activations caused by intentional actions.

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Digital Alarm Communicator Transmitter (DACT)

Encodes output signals from alarm systems for transmission over dedicated lines.

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Digital Alarm Communicator Receiver (DACR)

Receives and decodes signals from DACTs for interpretation.

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Signaling Line Circuit (SLC)

Path connecting different addressable devices within the fire alarm system.

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Notification Appliances

Devices used for signaling alarms, including audible and visible alerts.

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Visible Notification Appliance

Alerts individuals visually, enhancing communication in emergencies.

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Mass Notification System (MNS)

Notifies occupants and delivers emergency information and instructions.

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Control Unit

Motors inputs and controls outputs in the alarm system.

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Fire Alarm Control Panel (FACP)

Main controller processing signals from initiating devices and activating outputs.

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Initiating Device

A component that triggers the transmission of a system state change, such as an alarm.

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Restorable and Nonrestorable Initiating Devices

Devices that can or cannot be reset without destruction during operation.

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Zone

A defined area within a protected building for alarm signal management.

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Notification Zone

A specific area designed for common notification of alarm signals in a building.

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Study Notes

Key Terms in Fire Alarm Systems

  • AHJ (Authority Having Jurisdiction): Refers to the organization, office, or individual responsible for enforcing the requirements of a code or standard.

  • Addressable Device: Component of a fire alarm system identified individually to control specific functions and monitor status.

  • Adverse Conditions: Situations affecting communication and interpretation of status change signals at supervising stations.

  • Auxiliary Alarm Box: Alarm box operated by initiating devices or an auxiliary system to alert a communications center.

  • Manual Fire Alarm Box: Device requiring manual activation to initiate a fire alarm signal.

  • Alarm System: Systems designed to alert individuals to potential fire hazards.

  • Alarm Verification Feature: System feature that confirms an alarm condition over a time period to reduce unwanted alarms.

  • Annunciation: Unit providing status information through indicators or displays regarding circuit conditions or locations.

  • Audible Notification Appliance: Devices such as horns and bells that signal fire or emergency situations.

  • Ceiling: The upper surface of a space; in spaces with suspended ceilings, two distinct ceilings exist.

  • Sloping Ceiling: A ceiling that has a slope greater than 1 in 8.

  • Smooth Ceiling: Ceiling without continuous projections extending more than 4 inches below the surface.

Monitoring and Detection

  • Central Station: Facility that monitors alarm systems off-site and notifies the fire department of alarms.

  • Detector: Device responding to physical stimuli like smoke, heat, or gas.

  • Heat Detectors: Triggered by significant temperature increases or rates of temperature rise.

  • Smoke Detector: Initiates alarms in response to visible or invisible combustion products.

  • Combination Detector: Device detecting multiple fire conditions or utilizing more than one detection principle.

  • Air Sampling-Type Detector: Utilizes a distribution network to continuously sample air for smoke particles.

Alarm and Condition Types

  • Alarm Condition: Indicates an immediate threat to life or property.

  • Pre-Alarm Condition: Indicates a potential threat allowing time for intervention.

  • Supervisory Condition: Abnormal situations requiring supervision of other systems or equipment.

  • Trouble Condition: Any system fault that creates an abnormal state.

  • Nuisance Alarm: An alarm triggered without real hazard conditions.

  • Malicious Alarms: Alarm activations caused by deliberate actions.

Integration and Communication

  • Digital Alarm Communicator Transmitter (DACT): Encodes output signals from alarm systems for transmission over dedicated lines.

  • Digital Alarm Communicator Receiver (DACR): Receives and decodes signals from DACTs for interpretation.

  • Signaling Line Circuit (SLC): Path connecting various addressable devices within the fire alarm system.

Fire Alarms and Notifications

  • Notification Appliances: Devices used for signaling alarms, including audible and visible alerts.

  • Visible Notification Appliance: Alerts individuals visually, enhancing communication in emergencies.

  • Mass Notification System (MNS): Notifies occupants and provides emergency information and instructions.

System Components and Types

  • Control Unit: Motors inputs and controls outputs in the alarm system.

  • Fire Alarm Control Panel (FACP): Main controller processing signals from initiating devices and activating outputs.

  • Initiating Device: Component triggering the transmission of a change in system state.

  • Restorable and Nonrestorable Initiating Devices: Devices that can or cannot be reset without destruction during operation.

Zones in Fire Alarm Systems

  • Zone: A defined area within protected premises for alarm signal management.

  • Notification Zone: A specific area designed for common notification of alarm signals within the building.

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Description

This quiz covers essential terms related to fire alarm systems, including their definitions and functionalities. Test your knowledge on concepts like AHJ, addressable devices, and alarm verification features. Perfect for professionals in fire safety and engineering fields.

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