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Machine Design

Machine Design
The product of the diametral pitch and circular pitch is equal to

1
1/π
π × number of teeth
π

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Machine Design
The shear stress in a beam varies from zero at the outer fibers to a maximum at the________.

Upper surface
Lower surface
None of these
Neutral surface

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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 - addendum angle
Pitch angle + dedendum angle

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Machine Design
Screws used for power transmission should have

Strong teeth
Very fine threads
High efficiency
Low efficiency

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Machine Design
The number of slots in a 25 mm castle nut is

8
6
2
4

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Machine Design
Brittle coating technique is used for

Experimental stress analysis
Protecting metal against corrosion
Determining brittleness
Protecting metal against wear and tear

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