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Machine Design

Machine Design
If the tearing efficiency of a riveted joint is 75%, then the ratio of diameter of rivet to the pitch is equal to

0.5
0.6
0.25
0.2

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Machine Design
A screw is said to be a self locking screw, if its efficiency is

More than 50%
None of these
Equal to 50%
Less than 50%

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Machine Design
Crushing resistance required to crush the rivet per pitch length is

p.t.σc
n.d.t.σc
p.d.σc
(p - d) t.σc

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Machine Design
The suitable material for belt in agricultural machinery is

Balata gum
Leather
Rubber
Cotton duck

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Machine Design
The expression 0.175 - 0.841/T is the Lewis form factor for

None of these
20° full depth involute system
20° stub system
14½° composite and full depth involute system

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Machine Design
According to Indian standards, a bolt thread of 6 mm size of coarse pitch and with allowance on the threads and normal tolerance grade is designated as

M8 - 6d
M6 - 8d
M6
M8

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