Machine Design
An elastic bar is fixed at the upper end and loaded at the lower end by a falling weight. The shock load produced can be reduced by

Decreasing the modulus of elasticity of the bar
All of these
Increasing the length of bar
Decreasing the cross-sectional area of the bar

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Machine Design
When the belt speed increases

Power transmitted decreases
Power transmitted increases to a maximum value and then decreases
Power transmitted increases
Power transmitted remains the same

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

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