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MCQs

Total Questions : 34 | Page 3 of 4 pages
Question 21. Which material is used for intermediate polishing of soft materials?
  1.    Emery paper
  2.    Silicon carbide
  3.    Globar
  4.    Acetal copolymer polyoxymethylene
 Discuss Question
Answer: Option B. -> Silicon carbide
Answer: (b).Silicon carbide
Question 22. What is the final stage of intermediate polishing using emery paper?
  1.    3/0
  2.    4/0
  3.    5/0
  4.    6/0
 Discuss Question
Answer: Option B. -> 4/0
Answer: (b).4/0
Question 23. Which of the following is not used for fine polishing of the mount?
  1.    Aluminum oxide
  2.    Diamond paste
  3.    Bauxite tailing
  4.    Cerium oxide
 Discuss Question
Answer: Option C. -> Bauxite tailing
Answer: (c).Bauxite tailing
Question 24. Which polishing cloth is mostly used for polishing of materials?
  1.    Gamal
  2.    Brass
  3.    Nylon
  4.    Polyester
 Discuss Question
Answer: Option A. -> Gamal
Answer: (a).Gamal
Question 25. What does Stefan-Boltzmann law for radiation pyrometers denote?
  1.    W = KT⁴
  2.    W = KT
  3.    W = KT⁻⁴
  4.    W = K/T⁴
 Discuss Question
Answer: Option A. -> W = KT⁴
Answer: (a).W = KT⁴
Question 26. Removal of hard sample material is done by _________
  1.    Manual hacksawing
  2.    Piercing
  3.    Abrasive cutoff wheel
  4.    Oxy-fuel burning
 Discuss Question
Answer: Option C. -> Abrasive cutoff wheel
Answer: (c).Abrasive cutoff wheel
Question 27. What can be done to make the color comparison better for an optical pyrometer?
  1.    Better accuracy of telescope
  2.    Using electrical circuit for control box
  3.    Inclusion of absorbing screen
  4.    Using red filter
 Discuss Question
Answer: Option D. -> Using red filter
Answer: (d).Using red filter
Question 28. What is the maximum usable temperature of radiation pyrometers?
  1.    1000 F
  2.    5000 F
  3.    10000 F
  4.    No limit
 Discuss Question
Answer: Option D. -> No limit
Answer: (d).No limit
Question 29. What can be done to increase the temperature range of optical pyrometers?
  1.    Better accuracy of telescope
  2.    Using electrical circuit for control box
  3.    Inclusion of absorbing screen
  4.    Using red filter
 Discuss Question
Answer: Option C. -> Inclusion of absorbing screen
Answer: (c).Inclusion of absorbing screen
Question 30. What can be done to make the specimen easy to handle?
  1.    Surface grinding
  2.    Cylindrical grinding
  3.    Rough grinding
  4.    Creep-feed grinding
 Discuss Question
Answer: Option C. -> Rough grinding
Answer: (c).Rough grinding

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