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Machine Design

Machine Design
Rankine's theory is used for

Elastic materials
Brittle materials
Plastic materials
Ductile materials

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Machine Design
A plate with an elliptical hole in the centre, with semi-major axis (a) perpendicular to the direction of loading and semi-minor axis (b) along the direction of loading, is subjected to a pull P. The maximum stress induced at the edge of the hole is equal to (where σ = Stress for a plate with no hole i.e. nominal stress)

σ [1 + (b/3a)]
σ [1 + (b/2a)]
σ [1 + (2a/b)]
σ [1 + (3a/b)]

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Machine Design
A column is known as a long column if the slenderness ratio is

100
50
70
40

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Machine Design
In the case of an elastic bar fixed at upper end and loaded by a falling weight at lower end, the shock load produced can be decreased by

Increasing the cross-section area of bar
Remain unaffected with cross-section area
Would depend upon other factors
Decreasing the cross-section area of bar

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Machine Design
In a butt welded joint, the size of weld is __________ the throat of weld.

0.5 times
Double
2 times
Equal to

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Machine Design
The face angle of a bevel gear is equal to

Pitch angle - dedendum angle
Pitch angle + addendum angle
Pitch angle + dedendum angle
Pitch angle - addendum angle

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