Electrical Panel Boards and Utilization Equipment
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Questions and Answers

What is the unit of electric resistance?

  • Volt
  • Watt
  • Ampere
  • Ohm (correct)

    • Which unit represents the rate of doing electrical work?

  • Ohm
  • Volt
  • Watt-hour (correct)
  • Coulomb

    • According to Ohm's Law, what happens to the current in a circuit if the resistance increases?

  • Voltage increases
  • Current increases
  • Current decreases (correct)
  • Current remains the same

    • What is the unit of electric power?

    <p>Watt</p> Signup and view all the answers

    Which component in an electric field moves a charge between two points?

    <p>Volt</p> Signup and view all the answers

    What does electric load control aim to achieve?

    <p>Reduce demand charge</p> Signup and view all the answers

    What is the main purpose of an Automatic Transfer Switch (ATS)?

    <p>To automatically supply emergency service on failure of normal power</p> Signup and view all the answers

    How does a Fuse function in an electrical circuit?

    <p>It allows all current passing through the circuit to pass through it before melting</p> Signup and view all the answers

    Which protective device functions as a switch as well as an overcurrent protector?

    <p>Circuit Breaker</p> Signup and view all the answers

    What material is commonly used to make Wall Plates or Faceplates?

    <p>Plastic (Bakelite)</p> Signup and view all the answers

    What is the function of Ground Fault Circuit Interrupters (GFCI) in an electrical system?

    <p>To provide ground fault protection and function as a circuit breaker</p> Signup and view all the answers

    Where are the protective devices housed in an electrical system?

    <p>In panelboards</p> Signup and view all the answers

    What is the function of panel boards and sub-panel boards in an electrical system?

    <p>To control and protect sub feeders and branch circuits</p> Signup and view all the answers

    What does a bus do in an electrical system?

    <p>Collect, carry, and distribute large electric currents</p> Signup and view all the answers

    What is the purpose of a grounding electrode in an electrical system?

    <p>Establish a ground connection</p> Signup and view all the answers

    What happens when a fuse melts in an electrical circuit?

    <p>It automatically interrupts the circuit to prevent excess current</p> Signup and view all the answers

    How does a circuit breaker differ from a fuse in an electrical system?

    <p>A circuit breaker can be reclosed and reused, while a fuse needs replacement</p> Signup and view all the answers

    Where are the switches, fuses, and circuit breakers mounted for controlling branch circuits in an electrical system?

    <p>Panel boards</p> Signup and view all the answers

    Where are lighting and outlet loads typically connected in a Three Phase AC electrical system?

    <p>Between any phase leg and a neutral line</p> Signup and view all the answers

    What is the purpose of a transformer vault in a large building?

    <p>To house a transformer and auxiliary equipment</p> Signup and view all the answers

    What is the function of a standby generator in a building's electrical system?

    <p>To act as a backup power source during outages</p> Signup and view all the answers

    What is the purpose of a service entrance conductor in an electrical system?

    <p>To extend from a service drop to the building's equipment</p> Signup and view all the answers

    What is the definition of a line drop in a power line system?

    <p>The decrease in voltage between two points caused by resistance or leakage</p> Signup and view all the answers

    What is the role of a substation in an electrical system?

    <p>To step up or down voltage levels</p> Signup and view all the answers

    What is another name for Non-Metallic Sheathed Cable?

    <p>ROMEX</p> Signup and view all the answers

    Which type of cable is specifically designed for installation in cable trays, raceways, or where supported by wire?

    <p>Power and Control Tray Cable (Type TC)</p> Signup and view all the answers

    What distinguishes Shielded Non-Metallic Sheathed Cable (Type SNM) from Non-Metallic Sheathed Cable (Type NM)?

    <p>Covering within an overlapping spiral metal tape</p> Signup and view all the answers

    Which type of cable is recommended for direct burial in the ground as feeder or branch circuit?

    <p>Service Entrance Cable (Type SE or USE)</p> Signup and view all the answers

    What is the main purpose of Flat Conductor Cable (Type FCC)?

    <p>Placement in square structural channels</p> Signup and view all the answers

    Which cable type is provided with an overall covering and is primarily used for service wire?

    <p>Service Entrance Cable (Type SE or USE)</p> Signup and view all the answers

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