Chapter Quiz

  1. What is the force required to cause current to flow in a circuit and is also referred to as electromotive force or difference potential?
    1. Resistance
    2. Voltage
    3. Current
    4. Ohms
  2. What is the property of a component, circuit, or material that opposes current flow?
    1. Electromotive force
    2. Voltage
    3. Current
    4. Resistance
  3. Ohm’s Law states
    1. I = R/V
    2. R = P/V
    3. I = P/V
    4. I = V/R
  4. In three phase electric, the black, red, and white leads are used as the three hot leads.
    1. True
    2. False
  5. A circuit that has a complete path for the flow of electricity is said to have
    1. Resistance
    2. Amperage
    3. Ohms
    4. Continuity
  6. In the U.S. the alternating current frequency is 60 Hertz, meaning it cycles 60 times per
    1. Second
    2. Minute
    3. Hour
    4. Day
  7. Negatively charged parts of an atom are called
    1. Protons
    2. Neutrons
    3. Electrons
    4. Negatrons
  8. Atoms with very mobile electrons are called insulators.
    1. True
    2. False
  9. A ________ carries power from the source to the load.
    1. Conductor
    2. Voltage
    3. Resistor
    4. None of the above
  10. A __________ is used to step up or step down voltage.
    1. Relay
    2. Transformer
    3. Circuit
    4. Fuse
  11. Rubber, wood, and plastic are examples of insulators.
    1. True
    2. False
  12. Which of the following statements is correct?
    1. Voltage is measured in volts.
    2. Current is measured in amps.
    3. Resistance is measured in ohms.
    4. All of the above
  13. In a 480-volt circuit with a 30-horsepower motor, what would the current draw be?
    1. 47 amps
    2. 22 amps
    3. 10 amps
    4. 37 amps
  14. The strength of the magnetic field around a coil increases as ___________ increases.
    1. Current
    2. Number of turns
    3. Both current and number of turns
    4. None of the above
  15. Single phase 240-volt power comes from opposite ends of the same coil, making the two sine waves exactly opposite.
    1. True
    2. False
  16. Current actually flows toward the ______ pole because electrons have a ______ charge.
    1. Negative, positive
    2. Positive, negative
    3. Negative, neutral
    4. Positive neutral
  17. Using current in a primary coil to cause current in a secondary coil is called
    1. Mutual induction
    2. Three phase induction
    3. Single phase induction
    4. Magic
  18. What horsepower is a motor if the voltage is 220 and the current is 30 amps?
    1. 5.3 horsepower
    2. 808 horsepower
    3. 8.8 horsepower
    4. 10 horsepower