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Machine Design

Machine Design
Rankine's theory of failure is applicable for following type of materials

Ductile
Elastic
Brittle
Plastic

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Machine Design
The resultant axial load on a bolt depends upon

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

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Machine Design
Which process will increase the fatigue duration of parts?

De-carburisation
Shot-peening
Electroplating
Finishing and polishing

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Machine Design
The design of the pressure vessel is based on

Longitudinal stress
Longitudinal and hoop stress
Hoop stress
None of these

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Machine Design
For a shaft diameter of 100 mm, the number of bolts in a flange coupling should be

10
6
4
8

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Machine Design
A double fillet welded joint with parallel fillet weld of length 'l' and leg 's' is subjected to a tensile force 'P'. Assuming uniform stress distribution, the shear stress in the weld is given by

2P/s.l
√2P/s.l
P/√2.s.l
P/2.s.l

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