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MCQs

Total Questions : 137 | Page 8 of 14 pages
Question 71. Which of the following is not applicable for nitriding process?
  1.    Surface formed is extremely hard
  2.    Minimized cracking and distortion
  3.    Expensive
  4.    High-temperature treatment
 Discuss Question
Answer: Option D. -> High-temperature treatment
Answer: (d).High-temperature treatment
Question 72. Which of the following does not apply to cyaniding?
  1.    Requires less time
  2.    Operated at lower temperatures
  3.    Low corrosion resistance
  4.    Costly process
 Discuss Question
Answer: Option C. -> Low corrosion resistance
Answer: (c).Low corrosion resistance
Question 73. Cyaniding is usually done for _________
  1.    Plain carbon steels
  2.    Cast irons
  3.    Stainless steels
  4.    Pig iron
 Discuss Question
Answer: Option A. -> Plain carbon steels
Answer: (a).Plain carbon steels
Question 74. Cyaniding is carried out at a temperature of ___________
  1.    175°C
  2.    500°C
  3.    950°C
  4.    1300°C
 Discuss Question
Answer: Option C. -> 950°C
Answer: (c).950°C
Question 75. Gas cyaniding is otherwise known as __________
  1.    Nitriding
  2.    Carbonitriding
  3.    Induction Hardening
  4.    Flame Hardening
 Discuss Question
Answer: Option B. -> Carbonitriding
Answer: (b).Carbonitriding
Question 76. At what temperature is the workpiece tempered in carbonitriding process?
  1.    180°C
  2.    360°C
  3.    540°C
  4.    720°C
 Discuss Question
Answer: Option A. -> 180°C
Answer: (a).180°C
Question 77. How long is the heating process for carbonitriding done for?
  1.    1-2 hours
  2.    2-10 hours
  3.    12-20 hours
  4.    24-30 hours
 Discuss Question
Answer: Option B. -> 2-10 hours
Answer: (b).2-10 hours
Question 78. What are the applications of nitriding?
  1.    Gears, camshafts
  2.    Valve guides and seatings
  3.    Chain links, nuts, bolts, and screws
  4.    Gears, nuts, bolts
 Discuss Question
Answer: Option B. -> Valve guides and seatings
Answer: (b).Valve guides and seatings
Question 79. What is the case depth obtained in the cyaniding process?
  1.    0.38 mm
  2.    0.25 mm
  3.    0.5 mm
  4.    1.25 mm
 Discuss Question
Answer: Option B. -> 0.25 mm
Answer: (b).0.25 mm
Question 80. What is the hardness achieved in the carbonitriding process?
  1.    HRC 35
  2.    HRC 65
  3.    HRC 105
  4.    HRC 140
 Discuss Question
Answer: Option B. -> HRC 65
Answer: (b).HRC 65

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