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Machine Design

Machine Design
The railway carriage couplings have

Square threads
Acme threads
Knuckle threads
Buttress threads

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

Ductile
Brittle
Elastic
Plastic

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Machine Design
The dedendum is the radial distance from the

Pitch circle to the top of a tooth
Top of a tooth to the bottom of a tooth
Addendum circle to the clearance circle
Pitch circle to the bottom of a tooth

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Machine Design
The value of stress concentration factor depends upon

None of these
Material and geometry of the part
Geometry of the part
Material of the part

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

All of these
Tension
Shear
Compression

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Machine Design
The endurance limit of a material with finished surface in comparison to rough surface is

More or less depending on quantum of load
Less
Same
More

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