Hydraulics and Fluid Mechanics in ME According to fan laws, at constant speed and capacity, the pressure and power vary As square of density Inversely as density Inversely as square root of density Directly as the air or gas density As square of density Inversely as density Inversely as square root of density Directly as the air or gas density ANSWER DOWNLOAD EXAMIANS APP
Hydraulics and Fluid Mechanics in ME The increase in pressure at the outer edge of a drum of radius (r) completely filled up with liquid of density (ρ) and rotating at (ω) rad/s is ρ ω2 r2/2 ρ ω2 r2 ρ ω2 r2/4 2ρ ω2 r2 ρ ω2 r2/2 ρ ω2 r2 ρ ω2 r2/4 2ρ ω2 r2 ANSWER DOWNLOAD EXAMIANS APP
Hydraulics and Fluid Mechanics in ME Dynamic viscosity of most of the gases with rise in temperature remains unaffected decreases unpredictable increases remains unaffected decreases unpredictable increases ANSWER DOWNLOAD EXAMIANS APP
Hydraulics and Fluid Mechanics in ME The discharge over a rectangular weir, considering the velocity of approach, is (whereH1 = H + Ha = Total height of water above the weir, H = Height of water over the crest of the weir, and Ha = Height of water due to velocity of approach) (2/3) Cd × L. √2g [H13/2 - Ha3/2] (2/3) Cd × L. √2g [H15/2 - Ha5/2] (2/3) Cd × L.√2g [H12 - Ha2] (2/3) Cd × L.√2g [H1 - Ha] (2/3) Cd × L. √2g [H13/2 - Ha3/2] (2/3) Cd × L. √2g [H15/2 - Ha5/2] (2/3) Cd × L.√2g [H12 - Ha2] (2/3) Cd × L.√2g [H1 - Ha] ANSWER DOWNLOAD EXAMIANS APP
Hydraulics and Fluid Mechanics in ME The distance y from pipe boundary, at which the point velocity is equal to average velocity for turbulent flow, is (where R is radius of pipe) 0.577 R 0.223 R 0.707 R 0.423 R 0.577 R 0.223 R 0.707 R 0.423 R ANSWER DOWNLOAD EXAMIANS APP
Hydraulics and Fluid Mechanics in ME A model of a reservior is drained in 4 mts by opening the sluice gate. The model scale is 1: 225. How long should it take to empty the prototype ? 4 minutes 4 x (225)3/2 minutes 4 (225)1/3 minutes 4 x V225 minutes 4 minutes 4 x (225)3/2 minutes 4 (225)1/3 minutes 4 x V225 minutes ANSWER DOWNLOAD EXAMIANS APP
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