Fluid Mechanics

1

Uniform fluid flow occurs, when the derivative of the flow variables satisfy the following condition.

A. `(partial)/(partial t)` =0
B. `(partial)/(partial t)` =constant
C. `(partial)/(partial s)` =0
D. `(partial)/(partial s` =constant

2

The hydraulic radius for flow in a rectangular duct of cross-sectional dimension H, W is

A. `sqrt((HW)/(n))`
B. `(HW)/(2(H+W)^2)`
C. `(HW)/(4(H+W)^2)`
D. `(2HW)/((H+W))`

3

Drag force on the float of a rotameter is(where Q = flow rate of the

A. `prop` Q
B. `prop sqrt(Q)`
C. `prop Q^2`
D. constant

4

Steady fluid flow occurs, when the derivative of flow variables satisfy the following condition.

A. `(partial)/(partial s)` = 0
B. `(partial)/(partial t)` = 0
C. `(partial)/(partial s)` = constant
D. `(partial)/(partial t)`= consant

5

The Kozney-Carman equation, rewritten in terms of non-dimensional numbers gives` (Delta`P/`rho` u2) proportional to

A. `(L//D_p)/(R_e)`
B. `(R_e)/(D_p//L)`
C. `(L//D_p)/(R_e^2)`
D. `(R_e^2)/(D_p//L)`