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Machine Design

Machine Design
The shear modulus of resilience is proportional to

(Shear stress)3
(Shear stress)²
(Shear stress)⁴
Shear stress

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Machine Design
Two rigid plates are clamped by means of bolt and nut with an initial force F. After tightening, a separating force P (P < F) is applied to the lower plate, which in turn acts on the nut. The tension in the both after this is

F + P
F
P
F.P

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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

0.25
0.6
0.5
0.2

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Machine Design
For general industrial machinery, the ratio of the length of journal to its diameter is taken as

0.5 to 1
3 to 5
1 to 2
5 to 10

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Machine Design
The backlash for spur gears depends upon

Module
Both module and pitch line velocity
Pitch line velocity
Tooth profile

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Machine Design
The shock absorbing capacity of a bolt can be increased by

Making shank diameter equal to core diameter of thread
Increasing shank diameter
Tightening it properly
Grinding the shank

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