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Machine Design - Interview Questions and Answers

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26. When a close coiled helical spring is compressed, its wire is subjected to
A. tension
B. shear
C. compression
D. all of the above
E. none of the above.
Explanation:
27. In V-belt drive, belt touches
A. at bottom
B. at sides only
C. both at bottom and sides
D. could touch anywhere
E. none of the above.
Explanation:
28. Belt slip may occur due to
A. heavy load
B. loose belt
C. driving pulley too small
D. all of the above
E. none of the above.
Explanation:
29. In cross or regular lay ropes
A. direction of twist of wires in strands is opposite to the direction of twist of strands
B. direction of twist of wires and strands are same
C. wires in two adjacent strands are twisted in opposite direction
D. wires are not twisted
E. none of the above.
Explanation:
30. Basic shaft is one
A. whose upper deviation is zero
B. whose lower deviation is zero
C. whose lower as well as upper deviations are zero
D. does not exist
E. none of the above.
Explanation:
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