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Machine Design - Interview Questions and Answers

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96. The pitch of threads on a Jock nut in comparison to pitch of nut is
A. same
B. coarser
C. finer
D. very coarse
E. very fine.
Explanation:
97. Rivets are generally specified by
A. thickness of plates to be riveted
B. length of rivet
C. diameter of head
D. nominal diameter
E. all of the above.
Explanation:
98. A key made from a cylindrical disc having segmental cross-section, is known as
A. wood-ruff key
B. feather key
C. flat saddle key
D. gib head key
E. hollow saddle key.
Explanation:
99. Jam nut is a locking device in which
A. one smaller nut is tightened over main nut and main nut tightened against smaller one by loosening, creating friction jamming
B. a slot is cut partly in middle of nut and then slot reduced by tightening a screw
C. a hard fibre or nylon cotter is recessed in the nut and becomes threaded as the nut is screwed on the bolt causing a tight grip
D. through slots are made at top and a cotter-pin is passed through these and a hole in the bolt, and cotter splitted and bent in reverse direction at other end
E. none of the above.
Explanation:
100. A tapered key which fits in a keyway in the hub and is flat on the shaft, is known as
A. wood-ruff key
B. feather key
C. flat saddle key
D. gib head key
E. hollow saddle key.
Explanation:
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