Electrical Power Supply and Protection MCQ

Test your knowledge with important Electrical Power Supply and Protection MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30 + more Electrical Power Supply and Protection MCQs at Bissoy

• Live wire and hot wire are same.
  ক

  True

  খ

  False
• Green and yellow striped wire is also used to indicate ac (alternating current) supply live wire.
  ক

  True

  খ

  False
• What is the standard colour of ac supply neutral wire in India?
  ক

  Red

  খ

  Black

  গ

  Pink

  ঘ

  Green
• What is the standard colour of ac supply live wire in India?
  ক

  Red

  খ

  Magenta

  গ

  Pink

  ঘ

  Green
• What is the standard colour of ac supply ground wire in India?
  ক

  Red

  খ

  Magenta

  গ

  Pink

  ঘ

  Green
• What does “BOCB” stand for in context to circuit protections?
  ক

  Bulk on-spot circuit breakers

  খ

  Bonded oil circuit breaker

  গ

  Bulk oiled circuit breaker

  ঘ

  Bulk oil circuit breaker
• Which material is commonly used for making the arch of circuit breakers?
  ক

  Copper

  খ

  Tungsten

  গ

  Aluminium

  ঘ

  Copper tungsten alloy
• What is the medium in which arc is kept in BOCB (Bulk oil circuit breaker)?
  ক

  Oil

  খ

  Air

  গ

  Sand

  ঘ

  Water
• What is the principal on which MCB (Miniature circuit breaker) works ?
  ক

  Magnetic effect of electric current

  খ

  Lenz law

  গ

  Faradays law of electric current

  ঘ

  Flemings Right hand rule
• What does “MCB” stand for?
  ক

  Miniature circuit breaker

  খ

  Mini circuit breaker

  গ

  Miniature capacitor breaker

  ঘ

  Mini Capacitance breaker
• Potential difference and EMF (Electro-motive force) are same.
  ক

  True

  খ

  False
• What is the dielectric strength of Sulphur hexafluoride used in SF6 type circuit breaker?
  ক

  2.5 times of air

  খ

  2.5 times of water

  গ

  2.5 times of oil

  ঘ

  2.5 times of glass
• Which is not a property of Sulphur hexafluoride?
  ক

  Colourless

  খ

  Odourless

  গ

  Toxic

  ঘ

  Non-Inflammable
• SF6 circuit breakers are better than BOCB (Bulk oil circuit breaker).
  ক

  True

  খ

  False
• What is the medium in which arc is kept in SF6 circuit breaker?
  ক

  Oil

  খ

  Air

  গ

  Sand

  ঘ

  Sulphur hexafluoride