Question

Which of the following equations as suggested by Colebrook and White gives the increase in roughness of a new surface (ε₀) with age/time (t) (where, ε = roughness of the surface after time't'. α = a co-efficient to be experimentally determined)?

a.

ε = ε₀ + α.t

b.

ε = ε₀ + α.t²

c.

ε = ε₀ + α.t³

d.

ε = ε₀ + α.t⁴

Answer: (a).ε = ε₀ + α.t

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Q. Which of the following equations as suggested by Colebrook and White gives the increase in roughness of a new surface (ε₀) with age/time (t) (where, ε = roughness of the surface...

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