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Machine Design

Machine Design
In radial bearings, the load acts __________ to the axis of rotation.

Parallel
None of these
Perpendicular
Both A and B

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Machine Design
The spring mostly used in gramophones is

Conical spring
Flat spiral spring
Volute spring
Helical spring

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Machine Design
For a shoe brake, the equivalent coefficient of friction is equal to (where μ = Actual coefficient of friction, and θ = Semi-block angle)

μ sinθ/(2θ + sin 2θ)
2μ sinθ/(θ + sinθ)
4μ sinθ/(θ + sinθ)
4μ sinθ/(2θ + sin 2θ)

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Machine Design
Rankine Gordon formula for buckling is valid for

Long column
Short column
Short and long column
Very long column

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Machine Design
The arms of the pulleys for flat belt drive have

All the three characteristics
Major axis twice the minor axis
Elliptical cross-section
Major axis in plane of rotation

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Machine Design
A self locking screw has

Coefficient of friction is greater than tangent of load angle
Fine threads
Course threads
Hole for inserting split pin

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