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MCQs

Total Questions : 137 | Page 12 of 14 pages
Question 111. The molten baths used in liquid carburizing are composed of _________
  1.    20-50% sodium cyanide, 40% sodium carbonate
  2.    40% sodium cyanide, 20-50% sodium carbonate
  3.    10% sodium cyanide, 20% sodium carbonate
  4.    20% sodium cyanide, 10% sodium carbonate
 Discuss Question
Answer: Option A. -> 20-50% sodium cyanide, 40% sodium carbonate
Answer: (a).20-50% sodium cyanide, 40% sodium carbonate
Question 112. Which of the following is not applicable for liquid carburizing?
  1.    Uniform temperature
  2.    Dirty work surface
  3.    Temperature controlled by pyrometers
  4.    High cost of carburizing
 Discuss Question
Answer: Option B. -> Dirty work surface
Answer: (b).Dirty work surface
Question 113. Liquid carburizing temperature range lies between ________
  1.    120-250°C
  2.    300-375°C
  3.    425-660°C
  4.    870-950°C
 Discuss Question
Answer: Option D. -> 870-950°C
Answer: (d).870-950°C
Question 114. Liquid carburizing can be used for producing ________ cases.
  1.    0.05-0.1 mm
  2.    0.1-0.25 mm
  3.    0.3-0.6 mm
  4.    0.7-1.0 mm
 Discuss Question
Answer: Option B. -> 0.1-0.25 mm
Answer: (b).0.1-0.25 mm
Question 115. Nitriding involves the addition of ___________ for the hardening of surface.
  1.    Nitrogen
  2.    Nichrome
  3.    Neon
  4.    Niobium
 Discuss Question
Answer: Option A. -> Nitrogen
Answer: (a).Nitrogen
Question 116. Which of the following filler metals is used for carbide tip brazing?
  1.    BAG-1
  2.    BAG-4
  3.    BAG-8
  4.    BAG-18
 Discuss Question
Answer: Option B. -> BAG-4
Answer: (b).BAG-4
Question 117. Tin-zinc solders are used for joining __________
  1.    Aluminum
  2.    Zinc
  3.    Copper
  4.    Glass
 Discuss Question
Answer: Option A. -> Aluminum
Answer: (a).Aluminum
Question 118. Addition of ___________ increases the mechanical properties of a tin-lead solder.
  1.    Bismuth
  2.    Tellurium
  3.    Antimony
  4.    Molybdenum
 Discuss Question
Answer: Option C. -> Antimony
Answer: (c).Antimony
Question 119. Aluminum can be joined to another aluminum with the use of ________ solder.
  1.    Lead-silver
  2.    Indium-tin
  3.    Cadmium-silver
  4.    Fusible alloy
 Discuss Question
Answer: Option C. -> Cadmium-silver
Answer: (c).Cadmium-silver
Question 120. What is the solidus temperature of tin-lead solders?
  1.    183
  2.    297
  3.    444
  4.    604
 Discuss Question
Answer: Option A. -> 183
Answer: (a).183

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