Nitriding, Cyaniding and Carbonitriding MCQ

Test your knowledge with important Nitriding, Cyaniding and Carbonitriding MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30 + more Nitriding, Cyaniding and Carbonitriding MCQs at Bissoy

• Nitriding steels are tempered at about ________
  ক

  100-200oC

  খ

  300-450oC

  গ

  600-700oC

  ঘ

  800-950oC
• What are the applications of nitriding?
  ক

  Gears, camshafts

  খ

  Valve guides and seatings

  গ

  Chain links, nuts, bolts, and screws

  ঘ

  Gears, nuts, bolts
• What is the hardness achieved in the carbonitriding process?
  ক

  HRC 35

  খ

  HRC 65

  গ

  HRC 105

  ঘ

  HRC 140
• What is the case depth obtained in the cyaniding process?
  ক

  0.38 mm

  খ

  0.25 mm

  গ

  0.5 mm

  ঘ

  1.25 mm
• At what temperature is the workpiece tempered in carbonitriding process?
  ক

  180oC

  খ

  360oC

  গ

  540oC

  ঘ

  720oC
• How long is the heating process for carbonitriding done for?
  ক

  1-2 hours

  খ

  2-10 hours

  গ

  12-20 hours

  ঘ

  24-30 hours
• Gas cyaniding is otherwise known as __________
  ক

  Nitriding

  খ

  Carbonitriding

  গ

  Induction Hardening

  ঘ

  Flame Hardening
• Which of the following does not apply to cyaniding?
  ক

  Requires less time

  খ

  Operated at lower temperatures

  গ

  Low corrosion resistance

  ঘ

  Costly process
• Cyaniding is carried out at a temperature of ___________
  ক

  175oC

  খ

  500oC

  গ

  950oC

  ঘ

  1300oC
• Cyaniding is usually done for _________
  ক

  Plain carbon steels

  খ

  Cast irons

  গ

  Stainless steels

  ঘ

  Pig iron
• Which of the following is not applicable for nitriding process?
  ক

  Surface formed is extremely hard

  খ

  Minimized cracking and distortion

  গ

  Expensive

  ঘ

  High-temperature treatment
• Why is atmospheric nitrogen inappropriate for use in the nitriding process?
  ক

  Cannot be heated

  খ

  Insufficient density

  গ

  Inability to be absorbed

  ঘ

  Expensive process
• How long should a steel component be heat treated before nitriding?
  ক

  5-20 hours

  খ

  40-100 hours

  গ

  100-200 hours

  ঘ

  300-500 hours
• What is necessary to be done before the nitriding process?
  ক

  Heat Treatment

  খ

  Washing the material

  গ

  Chamfering of sample

  ঘ

  Shaping of material
• Why is nitriding not used for plain carbon steels?
  ক

  Formation of oxides

  খ

  Formation of cracks

  গ

  Formation of iron nitrides

  ঘ

  Formation of spots
• Which of the following is required for the nitriding process?
  ক

  Carbon

  খ

  Nitralloy

  গ

  Niobium

  ঘ

  Zirconium
• Nitriding involves the addition of ___________ for the hardening of surface.
  ক

  Nitrogen

  খ

  Nichrome

  গ

  Neon

  ঘ

  Niobium