Engineering Quiz: A Basic Electrical Theory Assessment Test

100 Questions | Total Attempts: 7505

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Engineering Quiz: A Basic Electrical Theory Assessment Test

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Questions and Answers
  • 1. 
    Frequency is measured in which of the following:
    • A. 

      Voltage

    • B. 

      Watts

    • C. 

      Hertz

    • D. 

      None of the above

  • 2. 
    For electroplating power, which of the following generators should be used?
    • A. 

      Separately excited

    • B. 

      Delta system

    • C. 

      Split phase

    • D. 

      None of the above

  • 3. 
    Power factor is equal to which of the following:
    • A. 

      Apparent power multiplied by true power

    • B. 

      True power divided by apparent power

    • C. 

      Watts multiplied by amps

    • D. 

      None of the above

  • 4. 
    The combined opposition to current by resistance and reactance is which of the following:
    • A. 

      ā€œZā€

    • B. 

      Impedance

    • C. 

      Both of the above

    • D. 

      None of the above

  • 5. 
    In a generator, voltage is produced by which of the following conditions:
    • A. 

      Electrical pressure

    • B. 

      Vibration

    • C. 

      Magnetism

    • D. 

      Cutting lines of force

  • 6. 
    A capacitor performs which of the following functions:
    • A. 

      It opposes changes in voltage

    • B. 

      It generators voltage

    • C. 

      It creates changes in amperage

    • D. 

      None of the above

  • 7. 
    Where the current flow through a conductor is greatest will be the point where the voltage drop is the lowest.
    • A. 

      True

    • B. 

      False

  • 8. 
    Of all of the materials used for insulation, which of the following has the highest electrical breakdown strength and the longest life:
    • A. 

      Rubber

    • B. 

      Cloth

    • C. 

      Impregnated paper

    • D. 

      Colored vinyl

  • 9. 
    What does it cost per year (at 8 cents per kWh) for the power loss of a 12 AWG circuit conductor (100ft long) that has a total resistance of 0.40 ohms and current flow of 16A?
    • A. 

      $30

    • B. 

      $50

    • C. 

      $70

    • D. 

      $90

  • 10. 
    A three horsepower motor is equivalent to which of the following in watts:
    • A. 

      746 watts

    • B. 

      2238 watts

    • C. 

      3000 watts

    • D. 

      None of the above

  • 11. 
    Illumination is measured in which of the following units:
    • A. 

      Lumens

    • B. 

      Foot candles

    • C. 

      Light per square inch

    • D. 

      None of the above

  • 12. 
    Some copper conductors are tinned to help prevent chemical reaction:
    • A. 

      A. True

    • B. 

      B. False

  • 13. 
    Which of the following should be tested to check for voltage to ground?
    • A. 

      A. From the breaker to the grounding neutral

    • B. 

      B. From hot to neutral

    • C. 

      C. From a breaker to the cabinet

    • D. 

      D. All of the above

  • 14. 
    During one complete rotation of 360 degrees, a three-phase 6-pole AC 34 kVA alternator on a Y- connected system will have how many cycles:
    • A. 

      4

    • B. 

      3

    • C. 

      18

    • D. 

      12

  • 15. 
    Which of the following terms is used to describe the inductive action, which causes current to flow on the outer surface of a conductor:
    • A. 

      Halo Effect

    • B. 

      Inductance

    • C. 

      Skin effect

    • D. 

      Insulated par value

  • 16. 
    The wattage  rating of a resistor determines its ability to absorb heat.
    • A. 

      True

    • B. 

      False

  • 17. 
    A wiring system has two lengths of wires, where wire A has a resistance of 10 ohms and wire B is three times the length of wire A with two times the cross-sectional area, which means that resistance of wire B is equal to which of the following:
    • A. 

      30 ohms

    • B. 

      20 ohms

    • C. 

      15 ohms

    • D. 

      10 ohms

  • 18. 
    The circuit conductors between service equipment and the final branch circuit overcurrent device are considered to be which of the following:
    • A. 

      Service laterals

    • B. 

      Feeder conductors

    • C. 

      Grounded conductors

    • D. 

      A wire assembly

  • 19. 
    The sum of series voltage drops equals the applied voltage.
    • A. 

      True

    • B. 

      False

  • 20. 
    If a transformer ratio is 20/1,  then which of the following is true:
    • A. 

      For every 20 turns in the primary, there is one turn in the secondary.

    • B. 

      The primary voltage is 20 times greater than that of the secondary.

    • C. 

      For every 20 rotations in the secondary, there is one rotation in the primary.

    • D. 

      None of the above

  • 21. 
    When a switch on a 110 amp system is closed, the total resistance of the switch is equal to which of the following:
    • A. 

      A. 55 amps

    • B. 

      B. 220 volts

    • C. 

      C. 1100 ohms

    • D. 

      D. Zero

  • 22. 
    If a series circuit has unequal resistances throughout the circuit, then which of the following is true:
    • A. 

      The lowest resistance has the highest current.

    • B. 

      The lowest resistance has the highest voltage.

    • C. 

      The highest resistance has the highest voltage.

    • D. 

      The highest resistance has the highest current.

  • 23. 
    When reduced to the most nominal component, the smallest element of matter is which of the following:
    • A. 

      One ohm of electrical current

    • B. 

      An atom

    • C. 

      Electrons

    • D. 

      None of the above

  • 24. 
    The armature reaction in an alternator is magnetizing at lagging loads.
    • A. 

      True

    • B. 

      False

  • 25. 
    A wire secured at one end with the other end fastened to a pole under tension is known as which of the following:
    • A. 

      Messenger wire

    • B. 

      A service drop

    • C. 

      A guy wire

    • D. 

      None of the above

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