Machine Design
If the size of a standard specimen for a fatigue testing machine is increased, the endurance limit for the material will

Increase
Have same value as that of standard specimen
Decrease
None of these

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Machine Design
Spring index is

Load required to produce unit deflection
Its capability of storing energy
Ratio of coil diameter to wire diameter
Indication of quality of spring

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Machine Design
Which is correct statement?

Which one is rigid will depend on several other factors
Both will be equally rigid
A member made of steel will generally be more rigid than a member of equal load carrying ability made of cast iron
A member made of cast iron will generally be more rigid than a member of equal load carrying ability made of steel

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Machine Design
In order to determine the stresses in a thin cylinder due to an internal pressure, it is assumed that

The effect of the restraining action of the heads at the end of the pressure vessel is neglected
The tensile stresses are uniformly distributed over the section of the walls
The effect of curvature of the cylinder wall is neglected
All of these

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