Cooling Techniques for Transformer MCQ

Test your knowledge with important Cooling Techniques for Transformer MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30 + more Cooling Techniques for Transformer MCQs at Bissoy

• Natural air cooling method can’t be adopted because of some unavoidable effects, beyond _______
  ক

  1.5 MVA

  খ

  5 MVA

  গ

  15 MVA

  ঘ

  50 MVA
• What is the function of breather in a transformer?
  ক

  To provide oxygen inside the tank

  খ

  To cool the coils during reduced load

  গ

  To cool the transformer oil

  ঘ

  To arrest flow of moisture when outside air enters the transformer
• What should be ideal volatility and ideal viscosity of the transformer oil?
  ক

  Low, low

  খ

  High, high

  গ

  Low, high

  ঘ

  High, low
• Which of the following listed component will see and perform according to changes in volume of transformer cooling oil due to variation of atmospheric temperature during day and night?
  ক

  Conservator

  খ

  Breather

  গ

  Bushings

  ঘ

  Buchholz relay
• Buchholz’s relay will give warning and protection against ___________
  ক

  Electrical fault inside the transformer itself

  খ

  Electrical fault outside the transformer in outgoing feeder

  গ

  For both outside and inside faults

  ঘ

  Cannot be determined
• Gas is liberated due to temperature limit and due to dissociation of transformer oil after ___________
  ক

  50°C

  খ

  80°C

  গ

  100°C

  ঘ

  150°C
• On which of the following transformer, Buchholz’s relay can be fixed on?
  ক

  Auto-transformers

  খ

  Air-cooled transformers

  গ

  Welding transformers

  ঘ

  Oil cooled transformers
• A transformer oil used in an electrical transformer must be free from ________
  ক

  Gases

  খ

  Odour

  গ

  Sludge

  ঘ

  Moisture
• Which chemical is used in breather?
  ক

  Asbestos fibre

  খ

  Silica sand

  গ

  Sodium chloride

  ঘ

  Silica gel
• Which of the following is the most important quality required for chemical in breather, so that it can be used perfectly in an electrical transformer?
  ক

  Ionizing air

  খ

  Absorbing moisture

  গ

  Cleansing the transformer oil

  ঘ

  Cooling the transformer oil
• What is the function of spacers?
  ক

  To insulate the coils from each other

  খ

  To provide free passage to the cooling oil

  গ

  To insulate coils and provide free passage

  ঘ

  Cannot be determined
• Natural oil cooling method have some limitations due to which it is adopted for transformers up to a rating of ____________
  ক

  3000 kVA

  খ

  1000 kVA

  গ

  500 kVA

  ঘ

  250 kVA
• Function of conservator in an electrical transformer is __________
  ক

  Supply cooling oil to transformer in time of need

  খ

  Provide fresh air for cooling the transformer

  গ

  Protect the transformer from damage when oil expends due to heating

  ঘ

  Cannot be determkned
• Which is the most common, famous and adopted method of cooling of a power transformer?
  ক

  Air blast cooling

  খ

  Natural air cooling

  গ

  Oil cooling

  ঘ

  Any of the above method can be used