Lakshya Education MCQs

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Question: Induction hardening is the process of
Options:
A. Hardening surface of work-piece to obtain hard and wear resistant surface
B. Heating and cooling rapidly
C. Increasing hardness throughout
D. Inducing hardness by continuous process
Answer: Option A
Explanation :

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More Questions on This Topic :

Question 1. Stress relaxation is the phenomenon
  1.     In which parts are not loaded
  2.     In which stress remains constant on increasing load
  3.     In which deformation tends to loosen the joint and produces a stress reduced
  4.     Stress reduces on increasing load
Answer: Option C
Explanation :
Question 2. Induction hardening is the process of
  1.     Hardening surface of work-piece to obtain hard and wear resistant surface
  2.     Heating and cooling rapidly
  3.     Increasing hardness throughout
  4.     Inducing hardness by continuous process
Answer: Option A
Explanation :
Question 3. Smelting is the process of
  1.     Removing the impurities like clay, sand etc. from the iron ore by washing with water
  2.     Expelling moisture, carbon dioxide, sulphur and arsenic from the iron ore by heating in shallow kilns
  3.     Reducing the ore with carbon in the presence of a flux
  4.     All of the above
Answer: Option C
Explanation :
Question 4. Stress relaxation is the phenomenon
  1.     In which parts are not loaded
  2.     In which stress remains constant on increasing load
  3.     In which deformation tends to loosen the joint and produces a stress reduced
  4.     Stress reduces on increasing load
Answer: Option C
Explanation :
Question 5. Smelting is the process of
  1.     Removing the impurities like clay, sand etc. from the iron ore by washing with water
  2.     Expelling moisture, carbon dioxide, sulphur and arsenic from the iron ore by heating in shallow kilns
  3.     Reducing the ore with carbon in the presence of a flux
  4.     All of the above
Answer: Option C
Explanation :
Question 6. In nodular iron, graphite is in the form of
  1.     Cementite
  2.     Free carbon
  3.     Flakes
  4.     Spheroids
Answer: Option D
Explanation :

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