Q.1
Which of the following does not apply to cyaniding?
  • a) Requires less time
  • b) Operated at lower temperatures
  • c) Low corrosion resistance
  • d) Costly process
Q.2
Gas cyaniding is otherwise known as __________
  • a) Nitriding
  • b) Carbonitriding
  • c) Induction Hardening
  • d) Flame Hardening
Q.3
How long is the heating process for carbonitriding done for?
  • a) 1-2 hours
  • b) 2-10 hours
  • c) 12-20 hours
  • d) 24-30 hours
Q.4
At what temperature is the workpiece tempered in carbonitriding process?
  • a) 180oC
  • b) 360oC
  • c) 540oC
  • d) 720oC
Q.5
What is the case depth obtained in the cyaniding process?
  • a) 0.38 mm
  • b) 0.25 mm
  • c) 0.5 mm
  • d) 1.25 mm
Q.6
What is the hardness achieved in the carbonitriding process?
  • a) HRC 35
  • b) HRC 65
  • c) HRC 105
  • d) HRC 140
Q.7
What are the applications of nitriding?
  • a) Gears, camshafts
  • b) Valve guides and seatings
  • c) Chain links, nuts, bolts, and screws
  • d) Gears, nuts, bolts
Q.8
Nitriding steels are tempered at about ________
  • a) 100-200oC
  • b) 300-450oC
  • c) 600-700oC
  • d) 800-950oC
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