QUIZ - 6



  1. Buchholz relay is used in-
      2. Oil cooled Transformer
      Air cooled Transformer
      Transmission Line
      Generator


  2. Buchholz relay operates on the principle of-
      3. over current
      over voltage
      Gas
      Over power


  3. Buchholz relay is installed-
      4. Between of transformer tank and conservator
      in the Conservator
      in the Main tank
      in the Reservoir


  4. Buchholz relay is used for protection of transformer from
      5. The flow of excessively high current
      Low level of oil in main tank
      Both (a) and (b)
      Excessive high voltage


  5. Buchholz relay is-
      6. Safety device
      Control device
      Generating device
      Electrical instrument


  6. How do we test Buchholz relay during maintenance
      7. Generate air bubbles with pump and force it to Buchholz relay
      Reduce oil level in Buchholz relay
      Both (a) & (b)
      None of these


  7. Buchholz relay is used to protect from
      8. All internal faults of transformer
      All external faults of transformer
      Both (a) and (b)
      None of these


  8. Buchholz relay protects a transformer from
      9. Winding to ground fault
      Winding to winding fault
      Turn to turn fault
      All of these


  9. Minimum operating time of Buchholz relay is
      10. 0.1 Second
      1 Second
      2 Second
      0.5 Second


  10. Average operating time of Buchholz relay is
      11. 1 Second
      0.2 Second
      0.1 Second
      5 Second