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Machine Design

Machine Design
For maximum power, the velocity of the belt will be

None of these
√(T/3m)
√(T/m)
√(T/2m)

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Machine Design
Stress concentration factor is defined as the ratio of

Maximum stress to the nominal stress
Maximum stress to the endurance limit
Nominal stress to the endurance limit
Nominal stress to the maximum stress

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Machine Design
The dedendum circle diameter is equal to (where φ = Pressure angle)

Pitch circle diameter × sinφ
Clearance circle diameter × cosφ
Addendum circle diameter × cosφ
Pitch circle diameter × cosφ

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Machine Design
Which of the following formula is used in designing a connecting rod?

Johnson's parabolic formula
Euler's formula
Rankine's formula
Johnson's straight line formula

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Machine Design
In nitrated parts, the origins of the fatigue cracks will occur at

Within the core
Surface
None of these
Just below the surface

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Machine Design
The ratio of endurance limit in shear to the endurance limit in flexure is

0.4
0.55
0.33
0.5

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