NICET FAS-I flashcards
NICET FAS-I · Build recall with a focused review session.
33 cards. Read the term and the definition here. The deck at the top of this page is optional.
- Class A circuit
- A circuit that provides a redundant path so that a single open or ground fault does not prevent operation of any device on the circuit; the fault must still be annunciated as a trouble.
- Class B circuit
- A circuit with a single path; a single open disables the devices beyond the break, and the fault is annunciated as a trouble at the control unit.
- Initiating device circuit
- The circuit connecting conventional initiating devices to the control unit; devices report by zone rather than by individual address, so troubleshooting requires field tracing.
- Signaling line circuit
- The addressable circuit connecting individually addressed devices to the control unit; each device reports its status and address to the control unit.
- Notification appliance circuit
- The power circuit supplying audible and visible notification appliances; it must deliver at least the listed minimum voltage to the last appliance on the circuit.
- Supervisory signal
- An off-normal condition of a system component, such as a closed valve or low air pressure, annunciated distinctly from alarm and trouble signals.
- Trouble signal
- An indication of a circuit fault or component failure, such as an open, short, ground fault, or power loss, annunciated at the control unit.
- Waterflow switch
- An initiating device on a sprinkler system that reports water flow as an alarm condition; it is tested by opening the inspector's test connection.
- Valve tamper switch
- A supervisory device that reports when a sprinkler control valve is not fully open; its signal must be distinct from alarm and trouble signals.
- Manual fire alarm box
- A manually operated initiating device mounted along the path of egress at an accessible height, typically 42 to 48 inches to the operating handle.
- Smoke detector spacing
- The listed coverage distance for a smoke detector, typically a 30 ft nominal radius on smooth ceilings, adjusted for ceiling height and configuration.
- Heat detector listing temperature
- The temperature rating at which a fixed-temperature heat detector operates; it must be selected above the expected maximum ambient temperature.
- Duct smoke detector
- A detector installed in an air-handling system to sense smoke being circulated and to initiate shutdown of the unit where the design requires it.
- Visible appliance candela
- The rated light output of a visible notification appliance; the rating and mounting height determine the area the appliance covers.
- Audibility requirement
- The minimum sound pressure level a notification appliance must produce above ambient in an occupiable area, with a higher level required in sleeping areas.
- Secondary power supply
- The battery or other backup supply that operates the system when primary power fails; it must be sized for the standby and alarm loads.
- Battery calculation
- The computation of standby and alarm loads over the required times, derated for temperature and age, to size the secondary supply.
- Ground fault
- An unintended connection between a circuit conductor and ground; the system must detect and annunciate it as a trouble condition.
- Alarm silencing
- The function that silences notification appliances while retaining the alarm condition and visual indication until the system is reset.
- System reset
- The function that restores the control unit to normal supervision after an alarm or trouble condition has been cleared.
- Remote annunciator
- A supervised unit that displays system conditions at a location away from the main control unit and indicates the same conditions where required.
- Supervising station
- The location that receives fire alarm signals and acts on them; the method of monitoring is part of the system design.
- Acceptance test
- The test performed after installation to verify that each device and circuit performs as designed before the system is placed in service.
- Record of completion
- Documentation including as-built drawings, device list, battery calculations, and testing records that describes the installed system.
- Authority having jurisdiction
- The organization or individual responsible for enforcing the code; it may witness acceptance testing and require additional documentation.
- Addressable device address
- The discrete identifier assigned to a device on a signaling line circuit; duplicate addresses cause faults and prevent proper annunciation.
- Voltage drop
- The reduction in voltage along a notification appliance circuit due to conductor resistance; it must not reduce the last appliance below its listed minimum.
- Primary power supply
- The dedicated normal source of power for the fire alarm system, protected by a breaker or fuse accessible only to authorized personnel.
- Battery charger
- The device that restores the secondary supply to full charge within the required time after a discharge; its failure is annunciated as a trouble.
- Alarm signal distinction
- The requirement that alarm, supervisory, and trouble signals be distinguishable from each other by audible and visual means.
- Inspection and testing interval
- The frequency at which a system component must be inspected and tested under the code; it depends on the component and the system type.
- Notification appliance supervision
- The monitoring of notification appliance circuits and power supplies so that a failure is annunciated as a trouble condition.
- Smoke detector sensitivity
- The listed response of a smoke detector expressed in percent per foot obscuration; field testing verifies response within the listed range.