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Machine Design

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

(p - d) t.σc
p.d.σc
p.t.σc
n.d.t.σc

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Machine Design
In order to withstand resistance to wear, the best profile of gear is

20° full depth involute tooth
14½° full depth involute tooth
20° involute stub tooth
14½° stub tooth

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Machine Design
The condition for maximum power transmission is that the maximum tension in the flat belt should be equal to(Where, Pc = tension in belt due to centrifugal force)

3 Pc
2 Pc
1 Pc
Pc/3

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Machine Design
When a nut is tightened by placing a washer below it, the bolt will be subjected to following type of loads

Compression
Combined loads
Tension
Shear

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Machine Design
According to Unwin's formula, the relation between the diameter of rivet hole (d) and the thickness of plate (t) is given by (where d and t are in mm)

d = 6√t
d = 2√t
d = 1.6√t
d = √t

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Machine Design
In skew bevel gearing, the axes of shafts are

Non-intersecting and non-parallel and the teeth are straight
Intersecting and the teeth are curved
None of these
Non-intersecting and nonparallel and the teeth are curved

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