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Machine Design

Machine Design
In worm gears, the pressure angle is __________ the angle between two inclined faces in axial plane.

Twice
Thrice
None of these
Half

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Machine Design
A special case of ductility which permits materials to be rolled or hammered into thin sheets, is called

Elasticity
Ductility
Plasticity
Malleability

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Machine Design
In a belt drive, if the pulley diameter is doubled keeping the tension and belt width constant, then it will be necessary to

Decrease the key length
Increase the key depth
Increase the key length
Increase the key width

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Machine Design
Stress concentration in static loading is more serious in

Brittle materials
Depends on other factors
Equally serious in both cases
Ductile materials

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Machine Design
A tube has the following advantage over pipe

Greater shock absorption
All of these
Lighter and easier to handle
Smoother inside walls

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Machine Design
The centre distance between two meshing involute gears is equal to

Difference of base circle radii/cosφ
Sum of base circle radii/cosφ
Difference of pitch circle radii/cosφ
Sum of pitch circle radii/cosφ

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