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Machine Design

Machine Design
The helix angle for single helical gears ranges from

15° to 20°
20° to 35°
35° to 50°
10° to 15°

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Machine Design
Fibrous fracture occurs in

Brittle material
Hard material
Ductile material
Elastic material

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Machine Design
According to Indian standard specifications, plain carbon steel designated by 40C8 contains carbon

0.20 to 0.40%
0.35 to 0.45%
0.40 to 0.60%
None of these

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Machine Design
The deflection of a cantilever beam under load W is 8. If its width is halved, then the deflection under load W will be

43869
44047
44045
43929

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Machine Design
The expression 0.175 - 0.841/T is the Lewis form factor for

20° stub system
20° full depth involute system
14½° composite and full depth involute system
None of these

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Machine Design
Rivets are generally specified by

Diameter of head
Nominal diameter
Length of rivet
Thickness of plates to be riveted

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