14.
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)?

15.
The capacity of a centrifugal pump Can be increased by increasing the

17.
What type of motion the fluid element undergoes, when it changes from one position to another position, such that the angle between the two sides change?

19.
A globe valve is the most suitable for applications, in which

20.
Fanning equation is given by $$\frac{{\Delta {\text{p}}}}{\rho } = 4{\text{f}} \cdot \frac{{\text{L}}}{{\text{D}}} \cdot \frac{{{{\text{v}}^2}}}{{2{{\text{g}}_{\text{c}}}}}.$$    It is applicable to __________ region flow.

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