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Machine Design

Machine Design
The crest diameter of a screw thread is same as

Minor diameter
Pitch diameter
Major diameter
Core diameter

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Machine Design
Maximum principal stress theory is applicable for

Brittle materials
Elastic materials
Ductile materials
All of these

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Machine Design
Stress concentration factor is defined as the ratio of

Nominal stress to the maximum stress
Maximum stress to the nominal stress
Maximum stress to the endurance limit
Nominal stress to the endurance limit

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Machine Design
The fatigue life of a part can be improved by

Coating
Electroplating
Polishing
Shot peening

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Machine Design
Which of the following coupling is used to connect two shafts which have both lateral and angular misalignment?

All of these
Universal coupling
Oldham coupling
Bushed pin type coupling

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Machine Design
The suitable material for belt in agricultural machinery is

Cotton duck
Balata gum
Leather
Rubber

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