SSC JE Civil Engineering 2017 Set 1 Solved Paper

Question : 122 of 200

Marks: +1, -0

At the centre line of a pipe flowing under pressure where the velocity gradient is zero, the shear stress will be ......... .

Solution:

Shear stress is simply proportional to the velocity gradient,

τ = µ{du}/{dy}

, and at cenre line

du = 0

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