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Machine Design

Machine Design
The suitable material for belt in agricultural machinery is

Leather
Cotton duck
Rubber
Balata gum

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Machine Design
In case of pressure vessels having open ends, the fluid pressure induces

None of these
Shear stress
Circumferential stress
Longitudinal stress

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Machine Design
The square threads are usually found on

Screw cutting lathes
Railway carriage couplings
Feed mechanism of machine tools
Spindles of bench vices

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Machine Design
In block brakes, the ratio of shoe width to wheel diameter is taken between

0.1 and 0.25
0.50 and 0.75
0.75 and 1
0.25 and 0.50

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Machine Design
A closely coiled helical spring is acted upon by an axial force. The maximum shear stress developed in the spring is τ. The half of the length of the spring if cut off and the remaining spring is acted upon by the same axial force. The maximum shear stress in the spring in new condition will be

4 τ
τ
τ/2
2 τ

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Machine Design
In a marine flange coupling, the thickness of flange is taken as

d/4
d/2
3d/4
d/3

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