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

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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))`

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A. `prop` Q

B. `prop sqrt(Q)`

C. `prop Q^2`

D. constant

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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

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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)`

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