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Machine Design

Machine Design
The pitch diameter is the __________ diameter of an external or internal screw thread.

None of these
Effective
Largest
Smallest

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Machine Design
The surface finish factor for a mirror polished material is

1
0.65
0.85
0.45

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Machine Design
The resultant axial load on a bolt depends upon

All of these
External load applied
Relative elastic yielding of the bolt and the connected members
Initial tension due to tightening of the bolt

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Machine Design
In a journal bearing, the load on the bearing is __________ to the axis of the journal.

None of these
Parallel
Perpendicular
Both A and B

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Machine Design
The suitable material for belt in agricultural machinery is

Leather
Rubber
Cotton duck
Balata gum

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Machine Design
The circumferential and longitudinal strains in a cylindrical boiler under internal steam pressure are εc and εl respectively. The change in volume of the boiler cylinder per unit volume will be

2εc + εl
εc² + εl
εc + εl²
εc + 2εl

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