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Machine Design

Machine Design
The size of a cam depends upon

Pitch curve
Prime circle
Pitch circle
Base circle

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Machine Design
The application of third type levers is found in

A pair of tongs
Hand wheel of a punching press
Lever of a loaded safety valve
Handle of a hand pump

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Machine Design
Guest's theory is used for

Plastic materials
Brittle materials
Ductile materials
Elastic materials

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Machine Design
I.S. specifies following total number of grades of tolerances

16
20
22
18

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Machine Design
The stress induced in the belt is,

Compressive stress
Tensile stress
Torsional shear stress
Direct shear stress

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Machine Design
The velocity factor for precision metallic gears cut with high accuracy and operating at velocities up to 20 m/s is equal to

4.5/ (4.5 + v)
6/ (6 + v)
3/ (3 + v)
0.75/ (0.75 + √v)

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