Insulating Varnishes MCQ

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• Which of the following is not a coating method for varnishes?
  ক

  Dip impregnation

  খ

  Vacuum impregnation

  গ

  Thick coat

  ঘ

  Flow coat
• At what temperature is Class F operation carried out?
  ক

  180oC

  খ

  155oC

  গ

  130oC

  ঘ

  105oC
• What kind of varnishes are used for most temperatures or classes?
  ক

  Silicone

  খ

  Polyester

  গ

  Acrylic

  ঘ

  Epoxy
• Acrylic varnishes are generally used in _______ gases.
  ক

  Acetylene

  খ

  Natural

  গ

  Refrigerant

  ঘ

  Nitrogen
• Silicone varnishes have a ______ operation.
  ক

  Class A

  খ

  Class B

  গ

  Class F

  ঘ

  Class H
• Which of the following is not a property of insulating varnishes?
  ক

  Moisture resistance

  খ

  Abrasion resistance

  গ

  Electric strength

  ঘ

  Oil receptive
• Dissolved resins in alcohol produce ______ varnishes.
  ক

  Oleoresinous

  খ

  Phenolic

  গ

  Spirit

  ঘ

  Alkyd
• Which of the following varnishes is oxidizing in nature?
  ক

  Air-drying

  খ

  Polymerizing

  গ

  Heat-reactive baking

  ঘ

  Solventless