Hydraulics and Fluid Mechanics - Mechanical Engineering Questions and Answers

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Venturimeter is used to

measure the velocity of a flowing liquid

measure the pressure of a flowing liquid

measure the discharge of liquid flowing in a pipe

measure the pressure difference of liquid flowing between two points in a pipe line

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A hemispherical tank of radius (R) containing liquid upto height (H₁) has an orifice of cross-sectional area (a) at its bottom. The time required to lower the level of liquid from (H₁) to (H₂) will be

$\frac { n } { C_d \times a\sqrt{2g} } [\frac {2}{3} R(H_1^\frac{3}{2} - H_2^\frac{3}{2}) - \frac{1}{5}(H_1^\frac{5}{2} - H_2^\frac{5}{2})]$

$\frac { 2n } { C_d \times a\sqrt{2g} } [\frac {2}{3} R(H_2^\frac{3}{2} - H_1^\frac{3}{2}) - \frac{1}{5}(H_2^\frac{5}{2} - H_1^\frac{5}{2})]$

$\frac { 2n } { C_d \times a\sqrt{2g} } [\frac {2}{3} R^2(H_1^\frac{3}{2} - H_2^\frac{3}{2}) - \frac{1}{5}(H_1^\frac{5}{2} - H_2^\frac{5}{2})]$

none of the above

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A flow is called super-sonic if the

velocity of flow is very high

discharge is difficult to measure

Mach number is between 1and 6

none of these

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The force present in a moving liquid is

inertia force

viscous force

gravity force

all of these