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MCQs

Total Questions : 66 | Page 3 of 7 pages
Question 21. Natural muscovite is normally stable up to ______
  1.    300°C
  2.    600°C
  3.    800°C
  4.    1000°C
 Discuss Question
Answer: Option B. -> 600°C
Answer: (b).600°C
Question 22. Which of the following is not a form of mica?
  1.    Fully trimmed
  2.    Partially trimmed
  3.    Film
  4.    Wire
 Discuss Question
Answer: Option D. -> Wire
Answer: (d).Wire
Question 23. Which of the following is not a property of insulating varnishes?
  1.    Moisture resistance
  2.    Abrasion resistance
  3.    Electric strength
  4.    Oil receptive
 Discuss Question
Answer: Option D. -> Oil receptive
Answer: (d).Oil receptive
Question 24. Which of the following varnishes is oxidizing in nature?
  1.    Air-drying
  2.    Polymerizing
  3.    Heat-reactive baking
  4.    Solventless
 Discuss Question
Answer: Option A. -> Air-drying
Answer: (a).Air-drying
Question 25. Dissolved resins in alcohol produce ______ varnishes.
  1.    Oleoresinous
  2.    Phenolic
  3.    Spirit
  4.    Alkyd
 Discuss Question
Answer: Option C. -> Spirit
Answer: (c).Spirit
Question 26. Silicone varnishes have a ______ operation.
  1.    Class A
  2.    Class B
  3.    Class F
  4.    Class H
 Discuss Question
Answer: Option D. -> Class H
Answer: (d).Class H
Question 27. Acrylic varnishes are generally used in _______ gases.
  1.    Acetylene
  2.    Natural
  3.    Refrigerant
  4.    Nitrogen
 Discuss Question
Answer: Option C. -> Refrigerant
Answer: (c).Refrigerant
Question 28. What kind of varnishes are used for most temperatures or classes?
  1.    Silicone
  2.    Polyester
  3.    Acrylic
  4.    Epoxy
 Discuss Question
Answer: Option B. -> Polyester
Answer: (b).Polyester
Question 29. Which of the following is not a coating method for varnishes?
  1.    Dip impregnation
  2.    Vacuum impregnation
  3.    Thick coat
  4.    Flow coat
 Discuss Question
Answer: Option C. -> Thick coat
Answer: (c).Thick coat
Question 30. At what temperature is Class F operation carried out?
  1.    180°C
  2.    155°C
  3.    130°C
  4.    105°C
 Discuss Question
Answer: Option B. -> 155°C
Answer: (b).155°C

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