Machine Design
The connecting rod bolts are tightened up so that tightening stress

Approaches yield point
Is 50% of yield point
Is about yield point divided by safety factor
Is just sufficient to hold parts together

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Machine Design
According to Rankine's theory, the failure occurs at a point in a member

When the strain energy per unit volume in a biaxial stress system reaches the strain energy at the elastic limit per unit volume as determined from a simple tension test
When the maximum shear stress in a biaxial stress system reaches the shear stress at elastic limit in a simple tension test
When the maximum principal stress in a biaxial stress system reaches the elastic limit of the material in a simple tension test
When the maximum principal strain in a biaxial stress system reaches the strain at the elastic limit as determined from a simple tension test

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Machine Design
Which is correct statement? Stress concentration in cyclic loading is

Seriousness would depend on other factors
Very serious in ductile materials and less serious in brittle materials
Equally serious in both types of materials
Very serious in brittle materials and less serious in ductile materials

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Machine Design
In case of V belt drive

None of these
The belt should not touch the sides of groove in the pulley
The belt should touch the bottom of groove in the pulley
The belt should not touch the bottom of groove in the pulley

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