Lakshya Education MCQs

Question: Cores are used to
Options:
A. Form internal cavities in the casting
B. Improve mould surface
C. Form a part of a green sand mould
D. All of these
Answer: Option D
Explanation :

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More Questions on This Topic :

Question 1. The blank diameter used in thread rolling will be
  1.     Equal to minor diameter of the thread
  2.     Equal to pitch diameter of the thread
  3.     A little larger than the minor diameter of the thread
  4.     A little larger than the pitch diameter of the thread
Answer: Option C
Explanation :
Question 2. The blank diameter used in thread rolling will be
  1.     Equal to minor diameter of the thread
  2.     Equal to pitch diameter of the thread
  3.     A little larger than the minor diameter of the thread
  4.     A little larger than the pitch diameter of the thread
Answer: Option C
Explanation :
Question 3. Green sand is a mixture of
  1.     30% sand and 70% clay
  2.     50% sand and 50% clay
  3.     70% sand and 30% clay
  4.     90% sand and 10% clay
Answer: Option C
Explanation :
Question 4. The welding process used to join the ends of two pipes of uniform cross-section, is
  1.     Spot welding
  2.     Seam welding
  3.     Projection welding
  4.     Upset butt welding
Answer: Option D
Explanation :
Question 5. Cores are used to
  1.     Form internal cavities in the casting
  2.     Improve mould surface
  3.     Form a part of a green sand mould
  4.     All of these
Answer: Option D
Explanation :
Question 6. During drawing operation, the states of stress in cup would include
  1.     Compressive stress in the flange
  2.     Tensile stress in the wall
  3.     Both (A) and (B)
  4.     None of these
Answer: Option C
Explanation :

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