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Machine Design

Machine Design
Ball bearing type screws are found in following application

Steering mechanism
Aeroplane engines
Screw jack
Crane

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Machine Design
Which of the following spring is used in mechanical wrist watch?

Spiral spring
Belleville spring
Helical compression spring
Torsion spring

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Machine Design
Which of the following screw thread is adopted for power transmission in either direction?

Acme threads
Square threads
Buttress threads
Multiple threads

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Machine Design
Soderberg relation is based on __________ of the material whereas all other failure relation for dynamic loading are based on ultimate strength of the material.

Shear strength
Yield strength
None of these
Elastic strength

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Machine Design
Oldham coupling is used to connect two shafts

Whose axes intersect at a small angle
Which are perfectly aligned
Which are not in exact alignment
Which have lateral misalignment

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Machine Design
The shearing stresses in the inner face as compared to outer face of the wire in a heavy close coiled spring is

Equal
Smaller
Larger
Larger/smaller depending on diameter of spring coil

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