Lakshya Education MCQs

Question: A moving mandrel is used in
Options:
A. Wire drawing
B. Tube drawing
C. Metal cutting
D. Forging
Answer: Option B
Explanation :

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Question 1. The electrode tip diameter (d) in spot welding should be equal to (where t = thickness of plate to be welded)
  1.     √t
  2.     1.5 t
  3.     3 t
  4.     6 t
Answer: Option A
Explanation :
Question 2. The operation of cutting a cylindrical hole in a sheet of metal by the punch and die is called
  1.     Shearing
  2.     Piercing
  3.     Punching
  4.     Blanking
Answer: Option B
Explanation :
Question 3. Which of the following statement is wrong?
  1.     The hot chamber die casting machine is used for casting zinc, tin, lead and other low melting alloys.
  2.     The cold chamber die casting machine is used for casting aluminium, magnesium, copper base alloys and other high melting alloys.
  3.     The castings produced by centrifugal casting method have open and coarse grained structure.
  4.     All of the above
Answer: Option C
Explanation :
Question 4. The electrode tip diameter (d) in spot welding should be equal to (where t = thickness of plate to be welded)
  1.     √t
  2.     1.5 t
  3.     3 t
  4.     6 t
Answer: Option A
Explanation :
Question 5. The operation of cutting a cylindrical hole in a sheet of metal by the punch and die is called
  1.     Shearing
  2.     Piercing
  3.     Punching
  4.     Blanking
Answer: Option B
Explanation :
Question 6. A moving mandrel is used in
  1.     Wire drawing
  2.     Tube drawing
  3.     Metal cutting
  4.     Forging
Answer: Option B
Explanation :

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