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Machine Design

Machine Design
In a flange coupling, the bolts are subjected to

Shear stress
Compressive stress
Tensile stress
None of these

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Machine Design
The design calculations for members subject to fluctuating loads with the same factor of safety, yield the most conservative estimates when using

Soderberg relation
None of these
Goodman relation
Gerber relation

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Machine Design
Factor of safety for fatigue loading is the ratio of

Elastic limit to the yield point
Young's modulus to the ultimate tensile strength
Elastic limit to the working stress
Endurance limit to the working stress

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Machine Design
A screw will be self locking, if

Efficiency of screw is 100%
Friction angle is less than helix angle
Friction angle is equal to helix angle
Friction angle is more than helix angle

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Machine Design
A bench vice has following type of threads

Metric
Buttress
Acme
Square

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Machine Design
The velocity factor for ordinary cut gears operating at velocities up to 12.5 m/s is equal to

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

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