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Machine Design

Machine Design
Guest's theory is used for

Plastic materials
Ductile materials
Elastic materials
Brittle materials

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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

εc² + εl
2εc + εl
εc + εl²
εc + 2εl

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Machine Design
A coupling used to connect two perfectly aligned shafts, is

Compression coupling
Muff coupling
All of these
Flange coupling

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Machine Design
When two non-intersecting and non-coplanar shafts are connected by gears, the arrangement is known as

Spiral gearing
Bevel gearing
Helical gearing
Spur gearing

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Machine Design
Stress concentration in cyclic loading is more serious in

Brittle materials
Ductile materials
Equally serious in both cases
Depends on other factors

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Machine Design
Which of the following key is preferred for the condition when a large amount of impact type torque is to be transmitted in both direction of rotation?

Gib-head key
Feather key
Woodruff key
Tangent key

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