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MCQs

Total Questions : 137 | Page 7 of 14 pages
Question 61. Which of the following is not a diffusion method of surface heat treatment?
  1.    Carburizing
  2.    Cyaniding
  3.    Induction hardening
  4.    Carbonitriding
 Discuss Question
Answer: Option C. -> Induction hardening
Answer: (c).Induction hardening
Question 62. Which of the following is not a method of carburizing?
  1.    Pack carburizing
  2.    Gas carburizing
  3.    Cyaniding
  4.    Nitriding
 Discuss Question
Answer: Option D. -> Nitriding
Answer: (d).Nitriding
Question 63. The energizer in pack carburizing makes up ________ of the total composition.
  1.    10%
  2.    25%
  3.    40%
  4.    80%
 Discuss Question
Answer: Option C. -> 40%
Answer: (c).40%
Question 64. The treatment of steel to get a stronger casing while maintaining a soft core is called _________
  1.    Surface hardening
  2.    Tempering
  3.    Sintering
  4.    Surface lining
 Discuss Question
Answer: Option A. -> Surface hardening
Answer: (a).Surface hardening
Question 65. Steels containing ________ carbon are used for carburizing.
  1.    0.1-0.2%
  2.    0.2-0.35%
  3.    0.4-0.6%
  4.    0.7-0.9%
 Discuss Question
Answer: Option A. -> 0.1-0.2%
Answer: (a).0.1-0.2%
Question 66. What kind of carbon-rich material is used in the carburizing mixture?
  1.    Charred leather
  2.    Sodium carbonate
  3.    Barium carbonate
  4.    Carbon black
 Discuss Question
Answer: Option A. -> Charred leather
Answer: (a).Charred leather
Question 67. What is the carburizing temperature?
  1.    150-250°C
  2.    400-450°C
  3.    650-700°C
  4.    900-950°C
 Discuss Question
Answer: Option D. -> 900-950°C
Answer: (d).900-950°C
Question 68. Gas carburizing differs from pack carburizing due to the use of ________
  1.    Silicon-providing gas
  2.    Mercury-providing gas
  3.    Carbon-providing gas
  4.    Argon
 Discuss Question
Answer: Option C. -> Carbon-providing gas
Answer: (c).Carbon-providing gas
Question 69. Which of the following holds true for pack carburizing?
  1.    Efficient heating
  2.    Uniform temperature
  3.    Easy to handle
  4.    Not readily adoptable
 Discuss Question
Answer: Option D. -> Not readily adoptable
Answer: (d).Not readily adoptable
Question 70. Prevention of carburizing of components can be done by ___________
  1.    Adding filler
  2.    Electroplating
  3.    Cold working
  4.    Adding water
 Discuss Question
Answer: Option B. -> Electroplating
Answer: (b).Electroplating

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