Transmission / AC/DC / Converter Stations/ Distribution

88 Questions | Total Attempts: 160

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Transmission / AC/DC / Converter Stations/ Distribution

Questions and Answers
  • 1. 
    The sending end voltage is higher than the receiving end voltage on a transmission line and requirement is to transmit power out of the control area: What needs to happen with the generation?
    • A. 

      Create a leading power angle

    • B. 

      Increase the frequency

    • C. 

      Increase the prime mover

    • D. 

      Adjust the voltage

  • 2. 
    Which is best described as a machine that is operating and is creating the effect of generating +VARS onto a transmission line  ?
    • A. 

      Induction motor

    • B. 

      Rectifier

    • C. 

      Add a reactor

    • D. 

      Synchronous machine

  • 3. 
    The phase shift between the sending and receiving ends of a transmission line is due to 
    • A. 

      Reactance

    • B. 

      Resistance

    • C. 

      Voltage at which the line is operated

    • D. 

      Conductor size

  • 4. 
    To insure the greatest transient stability of a line, it is best to:
    • A. 

      Maintain the balance the power into the line and the load

    • B. 

      Add series reactors

    • C. 

      Add resistance

    • D. 

      Increase the voltage

  • 5. 
    To increase the power handling stability capability in a long high voltage transmission line add_____
    • A. 

      Series capacitors

    • B. 

      Shunt capacitors

    • C. 

      Series Reactor

    • D. 

      Shunt reactor

  • 6. 
    Transient stability on transmission lines is most difficult for
    • A. 

      Line to ground fault

    • B. 

      Line to line fault

    • C. 

      Two-line to ground fault

    • D. 

      Three-phase fault

  • 7. 
    The operation of steady state stability limit of a power transmission system depends on the system synchronous reactance in which the system is operating at 
    • A. 

      True

    • B. 

      False

  • 8. 
    The surge impedance of a transmission line is directly proportional to line impedance and inversely proportional to capacitance
    • A. 

      True

    • B. 

      False

  • 9. 
    To counter the effects of charging current on a long transmission line (> 10 miles), charging current will be reduced if:
    • A. 

      Add series capacitor

    • B. 

      Add series reactor

    • C. 

      Add shunt capacitor

    • D. 

      Add shunt reactor

  • 10. 
    If power in a transmission line is exceeding the surge capacitance of the load what is the cause?
    • A. 

      Charging current less than power transfer

    • B. 

      Charging current higher than power transfer

    • C. 

      Charging current is equal to the power transfer

  • 11. 
    As a functional load, the most loss on a DC system is from
    • A. 

      Reactor

    • B. 

      Filter capacitors

    • C. 

      Valves

    • D. 

      Converter transformer

  • 12. 
    Reactive compensation methods do not cancel line charging.
    • A. 

      True

    • B. 

      False

  • 13. 
    Shunt capacitors supply VARS to the system
    • A. 

      True

    • B. 

      False

  • 14. 
    In a distribution system that has both underground cables and overhead lines, to divide the load equally, what is added to the overhead lines?
    • A. 

      Shunt Capacitors

    • B. 

      Shunt Reactors

    • C. 

      Series Capacitors

    • D. 

      Series Reactors

  • 15. 
    When running a neutral in an overhead distribution system
    • A. 

      A neutral in the distribution system is continuous

    • B. 

      The size of the neutral conductor is the same size as the other phase conductors

    • C. 

      The neutral of all transformers in the system is grounded at the transformer poles

    • D. 

      The neutral conductor is run in the secondary of the distribution system

  • 16. 
    The voltage spread (difference between the maximum and minimum voltage at a point in distribution system) between heavy and light loads is
    • A. 

      Largest for the first customer

    • B. 

      Smallest for the first customer

    • C. 

      Independent of the location

    • D. 

      Equal for both customers

  • 17. 
    What area is the smoothing reactor? 
    • A. 

      A

    • B. 

      B

    • C. 

      C

    • D. 

      D

    • E. 

      E

    • F. 

      F

  • 18. 
    What area designates the DC Filter?
    • A. 

      A

    • B. 

      B

    • C. 

      C

    • D. 

      D

    • E. 

      E

    • F. 

      F

  • 19. 
    What area designates the AC Filter?
    • A. 

      A

    • B. 

      B

    • C. 

      C

    • D. 

      D

    • E. 

      E

    • F. 

      F

  • 20. 
    What area is the Electrode (Line)?
    • A. 

      A

    • B. 

      B

    • C. 

      C

    • D. 

      D

    • E. 

      E

    • F. 

      F

  • 21. 
    What type of HVDC filter is this?
    • A. 

      Single tuned filter

    • B. 

      Double tuned filter

    • C. 

      High pass filter

  • 22. 
    What type of HVDC filter is this?
    • A. 

      Single tuned filter

    • B. 

      Double tuned filter

    • C. 

      High pass filter

  • 23. 
    What type of HVDC filter is this?
    • A. 

      Single tuned filter

    • B. 

      Double tuned filter

    • C. 

      High pass filter

  • 24. 
    During light load conditions power lines are primarily inductive
    • A. 

      True

    • B. 

      False

  • 25. 
    During heavy load conditions power lines are primarily capacitve
    • A. 

      True

    • B. 

      False

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