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Machine Design

Machine Design
When a close coiled helical spring is compressed, its wire is subjected to

Shear
Tension
Compression
All of these

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Machine Design
The process extensively used for making bolts and nuts is

Hot piercing
Extrusion
Cold heading
Cold peening

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Machine Design
In thrust bearings, the load acts

Parallel to the axis of rotation
In any direction
Along the axis of rotation
Perpendicular to the axis of rotation

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Machine Design
The ratio of belt tensions (p1/p2) considering centrifugal force in flat belt is given byWhere m = mass of belt per meter (kg/m)v = belt velocity (m/s)f = coefficient of frictiona = angle of wrap (radians)

P1 / P2 = eᶠα
(P1 - mv²)/ (P2 - mv²) = e–ᶠα
P1 / P2 = e–ᶠα
(P1 - mv²)/ (P2 - mv²) = eᶠα

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Machine Design
When a bolt is subjected to shock loading, the resilience of the bolt should be considered in order to prevent breakage at the

Thread
Middle
Head
Shank

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Machine Design
When the fulcrum is in between the load and effort, the lever is said to be of

Second type
Any one of these
Third type
First type

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