Hydraulics and Fluid Mechanics in ME The most economical section of a trapezoidal channel is one which has hydraulic mean depth equal to 1/4 × (depth + breadth) 1/2 × depth 1/2 × sloping side 1/2 × breadth 1/4 × (depth + breadth) 1/2 × depth 1/2 × sloping side 1/2 × breadth ANSWER DOWNLOAD EXAMIANS APP
Hydraulics and Fluid Mechanics in ME Piezometer is used to measure Atmospheric pressure Pressure in pipe, channels etc Very low pressures Difference of pressure between two points Atmospheric pressure Pressure in pipe, channels etc Very low pressures Difference of pressure between two points ANSWER DOWNLOAD EXAMIANS APP
Hydraulics and Fluid Mechanics in ME For laminar flow in circular pipes, the Darcy’s friction factor f is equal to 32/ Re 16/Re None of these 64/ Re 32/ Re 16/Re None of these 64/ Re ANSWER DOWNLOAD EXAMIANS APP
Hydraulics and Fluid Mechanics in ME The discharge through a large rectangular orifice is given by (where H1 = Height of the liquid above the top of the orifice, H2 = Height of the liquid above the bottom of the orifice, b = Breadth of the orifice, and Cd = Coefficient of discharge) Q = (2/3) Cd × b × √(2g) × (H22 - H12) Q = (2/3) Cd × b × √(2g) × (H21/2 - H11/2) Q = (2/3) Cd × b × √(2g) × (H23/2 - H13/2) Q = (2/3) Cd × b × √(2g) × (H2 - H1) Q = (2/3) Cd × b × √(2g) × (H22 - H12) Q = (2/3) Cd × b × √(2g) × (H21/2 - H11/2) Q = (2/3) Cd × b × √(2g) × (H23/2 - H13/2) Q = (2/3) Cd × b × √(2g) × (H2 - H1) ANSWER DOWNLOAD EXAMIANS APP
Hydraulics and Fluid Mechanics in ME The increase of temperature results in decrease in viscosity of liquid increase in viscosity of liquid decrease in viscosity of gas increase in viscosity of gas decrease in viscosity of liquid increase in viscosity of liquid decrease in viscosity of gas increase in viscosity of gas ANSWER DOWNLOAD EXAMIANS APP
Hydraulics and Fluid Mechanics in ME According to fan laws, for the fans having constant wheel diameters, the power demand varies Cube of fan speed Square root of fan speed Directly as fan speed Square of fan speed Cube of fan speed Square root of fan speed Directly as fan speed Square of fan speed ANSWER DOWNLOAD EXAMIANS APP
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