Hydraulics

1

Discharge with velocity of approach, over a rectangular weir is

A. `2/3 C_d xx L xx 2g [(H + ha)^(3//2) + ha^ (3//2)]`
B. `2/3 C_d xx L xx 2g [(H + ha)^(3//2) - ha^ (3//2)]`
C. `2/3 C_d xx L xx 2g [(H - ha)^(3//2) + ha^ (3//2)]`
D. `2/3 C_d xx L xx 2g [(H - ha)^(3//2) - ha^ (3//2)]`

2

Specific energy of a flowing fluid per unit weight is

A. `P/W + (V^2)/(2g)`
B. `P/W + (V)/(2g)`
C. ` (V^2)/(2g)+ h`
D. `P/W + (V^2)/(2g) + h`

3
The minimum specific energy of flow of water in open channel is : (where hc is the critical depth)
A. `h_c`
B. `h_c/2`
C. `(3h_c)/(2)`
D. `2/3 h_c`

4
The pressure variation along the radial direction for vortex flow along a horizontal plane is related by
A. `(partial rho)/(partial r) = - rho V^2/r`
B. `(partial rho)/(partial r) = rho V^2/r`
C. `(partial rho)/(partial r) = rho V/r^2`
D. `(partial rho)/(partial r) = rho V^2/r^2`

5

If L, D and f are the length, diameter and coefficient of friction of a pipe, the ratio of the areas of the pipe A and nozzle a, to transmit maximum power, is

A. `sqrt((8fL^2)/D))`
B. `sqrt((8L^2f)/D))`
C. `sqrt((8f//L)/D))`
D. `sqrt((8fL)/D))`