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Machine Design

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

6
8
2
4

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Machine Design
In designing a key, it is assumed that the distribution of forces along the length of key

Varies exponentially, being less at the torque-input end
Varies linearly
Is uniform throughout
Varies exponentially, being more at the torque-input end

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Machine Design
The maximum shear stress theory is used for

Nonferrous materials
Plastic materials
Brittle materials
Ductile materials

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Machine Design
The helix angle for single helical gears ranges from

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

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Machine Design
A compound cylinder with inner radius 50 mm and outer radius 70 mm is made by shrinking one cylinder on to the other cylinder, the junction radius is 60 mm and the junction pressure is 1.1 N/mm². The maximum hoop stress developed in the inner cylinder is

7.2 N/mm² tension
3.6 N/mm² compression
7.2 N/mm² compression
3.6 N/mm² tension

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Machine Design
Shear stress theory is applicable for

Elastic materials
Brittle materials
All of these
Ductile materials

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