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Machine Design

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

Brittle
Ductile
Plastic
Elastic

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Machine Design
When screw threads are to be used in a situation where power is being transmitted in one direction only, then the screw threads suitable for this will be

Buttress threads
Square threads
Acme threads
Knuckle threads

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Machine Design
A metal pipe of 1 m diameter contains a fluid having a pressure of 1 N/mm². If the permissible tensile stress in the metal is 20 N/mm², then the thickness of the metal required for making the pipe will be

15 mm
25 mm
5 mm
10 mm

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Machine Design
In order to withstand resistance to wear, the best profile of gear is

20° involute stub tooth
14½° full depth involute tooth
20° full depth involute tooth
14½° stub tooth

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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
Which of the following property is essential for spring materials?

Resilience
Plasticity
Ductility
Stiffness

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