Fluid Mechanics
Reynolds number for water flow through a tube of I.D. 5 cm is 1500. If a liquid of 5 centipoise viscosity and 0.8 specific gravity flows in the same pipe at the same velocity, then the pressure drop will

Increase
Data insufficient to predict pressure drop
Remain same
Decrease

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Fluid Mechanics
Shear stress in a fluid flowing in a round pipe

Remains constant over the cross-section
Varies parabolically across the cross-section
Is zero at the wall and increases linearly to the centre
Is zero at the centre and varies linearly with the radius

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