Earthing Or Grounding MCQ

Test your knowledge with important Earthing Or Grounding MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30+ more Earthing Or Grounding MCQs on Bissoy. Bissoy App

• The size of the earth or ground wire is based on the
  ক

  maximum fault current carrying through the ground wire

  খ

  rated current carrying capacity of the service line

  গ

  depends on the soil resistance

  ঘ

  both (A) and (C)
• Earth wire or ground wire is made of
  ক

  copper

  খ

  aluminium

  গ

  iron

  ঘ

  galvanized steel
• Average resistance of human body is
  ক

  500 ohms

  খ

  1000 ohms

  গ

  1500 ohms

  ঘ

  2000 ohms
• When earth fault occurs
  ক

  voltage potential at the earth mat increases due to grounding

  খ

  voltage potential at the earth mat decreases due to grounding

  গ

  voltage potential at the earth mat remains zero irrespective of fault

  ঘ

  none of the above
• Factors on which soil resistance depends
  ক

  depth of the electrode

  খ

  moisture

  গ

  Nacl

  ঘ

  all the above
• The objective of earthing or grounding is
  ক

  to provide as low resistance possible to the ground

  খ

  to provide as high resistance possible to the ground

  গ

  to provide flow of positive, negative and zero sequence currents

  ঘ

  none of the above
• For an EHV equipment for maintenance first it should be isolated and connected to ground because
  ক

  to provide low impedance

  খ

  to discharge the charging capacitance to ground

  গ

  protection for operating personnel

  ঘ

  both (B) and (C)
• Ground resistance should be designed such that
  ক

  grounding resistance should be as low as possible

  খ

  grounding resistance should be as high as possible

  গ

  grounding resistance should be always zero

  ঘ

  none of the above
• Generally grounding is provided for
  ক

  only for the safety of the equipment

  খ

  only for the safety of the operating personnel

  গ

  both (A) and (B)

  ঘ

  none of the above
• Moisture content in the soil _______ the earth soil resistance
  ক

  increase

  খ

  decrease

  গ

  does not affect

  ঘ

  none of the above