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MCQs

Total Questions : 68 | Page 7 of 7 pages
Question 61. Cold working is generally carried out __________
  1.    Below melting point
  2.    Above recrystallization temperature
  3.    At room temperature
  4.    Cryogenic temperature
 Discuss Question
Answer: Option C. -> At room temperature
Answer: (c).At room temperature
Question 62. How does hot working affect grain structure?
  1.    Refines it
  2.    Distorts it
  3.    Warps it
  4.    Has no effect
 Discuss Question
Answer: Option A. -> Refines it
Answer: (a).Refines it
Question 63. Which of the following is a drawback of cold working?
  1.    Oxide formation
  2.    Surface scaling
  3.    Decarburization
  4.    Low ductility
 Discuss Question
Answer: Option D. -> Low ductility
Answer: (d).Low ductility
Question 64. Which of the following is a hot working process?
  1.    Stamping
  2.    Squeezing
  3.    Forging
  4.    Bending
 Discuss Question
Answer: Option C. -> Forging
Answer: (c).Forging
Question 65. Which of the following is a characteristic of hot rolling?
  1.    Refines grain structure
  2.    Economic
  3.    Slow speed
  4.    Uniform size
 Discuss Question
Answer: Option C. -> Slow speed
Answer: (c).Slow speed
Question 66. __________ involves hammering of heated bars inside closed impression dies.
  1.    Press forging
  2.    Drop forging
  3.    Hammer forging
  4.    Upset forging
 Discuss Question
Answer: Option B. -> Drop forging
Answer: (b).Drop forging
Question 67. What is the hot rolling temperature of mild steel?
  1.    200°C
  2.    450°C
  3.    1000°C
  4.    1200°C
 Discuss Question
Answer: Option C. -> 1000°C
Answer: (c).1000°C
Question 68. Cold forging is done for _________
  1.    Improving strength and hardness
  2.    Adding forging scale
  3.    Eliminating carburization
  4.    Rough surface finish
 Discuss Question
Answer: Option A. -> Improving strength and hardness
Answer: (a).Improving strength and hardness

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