resistance(R)Oppositionto currentflow,measured inohms (Ω)fuseProtectivedevice thatmelts to openthe circuit whencurrent is toohigh.capacitorStoreselectricalcharge andreleases itwhen needed.statorthestationarycoil of wireinside thealternatoroscilloscopean electronic testinginstrument thatgraphically displayselectrical signals as awaveform on ascreen, showing howvoltage changes overtime.regulatorControlsalternatoroutputvoltage.relayElectricallyoperated switchused to controlhigh-currentcircuits with lowcurrent.switchManuallyoperateddevice thatopens or closesa circuit.opencircuitA break orinterruptionin the circuitpreventingcurrent flow.harnessBundle ofelectricalwires inprotectivecovering.voltage(V)Electricalpressure orpotentialdifference thatpushes currentthrough a circuit.groundCommon returnpath forelectricalcurrent; typicallyconnected to thevehicle chassis. Multimeter(DVOM)Tool used tomeasurevoltage,resistance,and current.watt(W)Unit ofelectricalpower; Power= Voltage ×Current.solenoidElectromagneticswitch thatmoves a plungeror contacts(used instarters).connectorDevice thatjoins electricalwires orcomponentstogether.loadAny componentthat useselectricalenergy (bulb,motor, heater,etc.).parallelcircuitComponentsconnectedacross the samevoltage; currentdivides amongbranches.terminalConnectionpoint forwiring orcomponents.resistorComponentthat limits orcontrolscurrent flow.batteryStores electricalenergy inchemical form;provides voltageto the system.circuitA completepath forcurrent toflow.current(I)The flow ofelectrons througha conductor,measured inamperes (amps).continuitytestCheck tosee if acircuit pathis complete.continuityA completepath with noopen circuits;verified with ameter.rectifierdiodeConverts ACcurrent toDC currentinside thealternator.EEPROMa type of non-volatilememory used incontrol modules(ECUs/ECMs) tostore data even whenthe vehicle’s batteryis disconnected.ampere(Amp)Unit used tomeasureelectricalcurrent flow.alternatorGenerateselectricalcurrent whilethe engineruns; chargesthe battery.shortcircuitUnintendedpath of lowresistancecausingexcessivecurrent flow.circuitbreakerReusableovercurrentprotectiondevice.troublecode(DTC)Diagnosticcode stored bythe vehicle’scontrol modulewhen a faultoccurs.commutatora reversing switchthat keeps themotor turningsmoothly byflipping the currentdirection at just theright time.referencevoltageStable voltage(usually 5V)supplied byan ECU to asensor.cotterpina metal fastener usedto secure otherfasteners, such asnuts or bolts, andprevent them fromloosening due tovibration.seriescircuitComponentsconnected end-to-end; samecurrent flowsthrough all.Ohm’sLawThe relationshipbetweenvoltage, current,and resistance:V = I × RparasiticdrawUnwantedelectrical drainfrom the batterywhen thevehicle is off.resistance(R)Oppositionto currentflow,measured inohms (Ω)fuseProtectivedevice thatmelts to openthe circuit whencurrent is toohigh.capacitorStoreselectricalcharge andreleases itwhen needed.statorthestationarycoil of wireinside thealternatoroscilloscopean electronic testinginstrument thatgraphically displayselectrical signals as awaveform on ascreen, showing howvoltage changes overtime.regulatorControlsalternatoroutputvoltage.relayElectricallyoperated switchused to controlhigh-currentcircuits with lowcurrent.switchManuallyoperateddevice thatopens or closesa circuit.opencircuitA break orinterruptionin the circuitpreventingcurrent flow.harnessBundle ofelectricalwires inprotectivecovering.voltage(V)Electricalpressure orpotentialdifference thatpushes currentthrough a circuit.groundCommon returnpath forelectricalcurrent; typicallyconnected to thevehicle chassis. Multimeter(DVOM)Tool used tomeasurevoltage,resistance,and current.watt(W)Unit ofelectricalpower; Power= Voltage ×Current.solenoidElectromagneticswitch thatmoves a plungeror contacts(used instarters).connectorDevice thatjoins electricalwires orcomponentstogether.loadAny componentthat useselectricalenergy (bulb,motor, heater,etc.).parallelcircuitComponentsconnectedacross the samevoltage; currentdivides amongbranches.terminalConnectionpoint forwiring orcomponents.resistorComponentthat limits orcontrolscurrent flow.batteryStores electricalenergy inchemical form;provides voltageto the system.circuitA completepath forcurrent toflow.current(I)The flow ofelectrons througha conductor,measured inamperes (amps).continuitytestCheck tosee if acircuit pathis complete.continuityA completepath with noopen circuits;verified with ameter.rectifierdiodeConverts ACcurrent toDC currentinside thealternator.EEPROMa type of non-volatilememory used incontrol modules(ECUs/ECMs) tostore data even whenthe vehicle’s batteryis disconnected.ampere(Amp)Unit used tomeasureelectricalcurrent flow.alternatorGenerateselectricalcurrent whilethe engineruns; chargesthe battery.shortcircuitUnintendedpath of lowresistancecausingexcessivecurrent flow.circuitbreakerReusableovercurrentprotectiondevice.troublecode(DTC)Diagnosticcode stored bythe vehicle’scontrol modulewhen a faultoccurs.commutatora reversing switchthat keeps themotor turningsmoothly byflipping the currentdirection at just theright time.referencevoltageStable voltage(usually 5V)supplied byan ECU to asensor.cotterpina metal fastener usedto secure otherfasteners, such asnuts or bolts, andprevent them fromloosening due tovibration.seriescircuitComponentsconnected end-to-end; samecurrent flowsthrough all.Ohm’sLawThe relationshipbetweenvoltage, current,and resistance:V = I × RparasiticdrawUnwantedelectrical drainfrom the batterywhen thevehicle is off.

CATS ASE Electrical - Call List

(Print) Use this randomly generated list as your call list when playing the game. There is no need to say the BINGO column name. Place some kind of mark (like an X, a checkmark, a dot, tally mark, etc) on each cell as you announce it, to keep track. You can also cut out each item, place them in a bag and pull words from the bag.


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  1. Opposition to current flow, measured in ohms (Ω)
    resistance (R)
  2. Protective device that melts to open the circuit when current is too high.
    fuse
  3. Stores electrical charge and releases it when needed.
    capacitor
  4. the stationary coil of wire inside the alternator
    stator
  5. an electronic testing instrument that graphically displays electrical signals as a waveform on a screen, showing how voltage changes over time.
    oscilloscope
  6. Controls alternator output voltage.
    regulator
  7. Electrically operated switch used to control high-current circuits with low current.
    relay
  8. Manually operated device that opens or closes a circuit.
    switch
  9. A break or interruption in the circuit preventing current flow.
    open circuit
  10. Bundle of electrical wires in protective covering.
    harness
  11. Electrical pressure or potential difference that pushes current through a circuit.
    voltage (V)
  12. Common return path for electrical current; typically connected to the vehicle chassis.
    ground
  13. Tool used to measure voltage, resistance, and current.
    Multimeter (DVOM)
  14. Unit of electrical power; Power = Voltage × Current.
    watt (W)
  15. Electromagnetic switch that moves a plunger or contacts (used in starters).
    solenoid
  16. Device that joins electrical wires or components together.
    connector
  17. Any component that uses electrical energy (bulb, motor, heater, etc.).
    load
  18. Components connected across the same voltage; current divides among branches.
    parallel circuit
  19. Connection point for wiring or components.
    terminal
  20. Component that limits or controls current flow.
    resistor
  21. Stores electrical energy in chemical form; provides voltage to the system.
    battery
  22. A complete path for current to flow.
    circuit
  23. The flow of electrons through a conductor, measured in amperes (amps).
    current (I)
  24. Check to see if a circuit path is complete.
    continuity test
  25. A complete path with no open circuits; verified with a meter.
    continuity
  26. Converts AC current to DC current inside the alternator.
    rectifier diode
  27. a type of non-volatile memory used in control modules (ECUs/ECMs) to store data even when the vehicle’s battery is disconnected.
    EEPROM
  28. Unit used to measure electrical current flow.
    ampere (Amp)
  29. Generates electrical current while the engine runs; charges the battery.
    alternator
  30. Unintended path of low resistance causing excessive current flow.
    short circuit
  31. Reusable overcurrent protection device.
    circuit breaker
  32. Diagnostic code stored by the vehicle’s control module when a fault occurs.
    trouble code (DTC)
  33. a reversing switch that keeps the motor turning smoothly by flipping the current direction at just the right time.
    commutator
  34. Stable voltage (usually 5V) supplied by an ECU to a sensor.
    reference voltage
  35. a metal fastener used to secure other fasteners, such as nuts or bolts, and prevent them from loosening due to vibration.
    cotter pin
  36. Components connected end-to-end; same current flows through all.
    series circuit
  37. The relationship between voltage, current, and resistance: V = I × R
    Ohm’s Law
  38. Unwanted electrical drain from the battery when the vehicle is off.
    parasitic draw