Fluid Mechanics As the velocity V and thus the Reynolds number of a flow past a sphere increases from very low value, the drag force for Re << 1 Increases linearly with V None of these Decreases as V² Decreases linearly with V Increases linearly with V None of these Decreases as V² Decreases linearly with V ANSWER DOWNLOAD EXAMIANS APP
Fluid Mechanics Mass velocity in case of steady flow and through a constant cross-section conduit is independent of the Both A & B Pressure Neither A nor B Temperature Both A & B Pressure Neither A nor B Temperature ANSWER DOWNLOAD EXAMIANS APP
Fluid Mechanics The equivalent diameter for pressure drop calculation for a duct of square cross-section is given by(where, x = each side of the square duct) πx x/2 x 2x πx x/2 x 2x ANSWER DOWNLOAD EXAMIANS APP
Fluid Mechanics A bed of spherical particles (specific gravity 2.5) of uniform size 1500 μm is 0.5 m in diameter and 0.5 m high. In packed bed state, the porosity may be taken as 0.4. Ergun's equation for the above fluid-particle system (in SI units) is given below : Δ P/L = 375 x 10³ VOM + 10.94 x 10⁶ V²OM (SI units) If water is to be used as the fluidising medium, the minimum fluidisation velocity, VOM is 12 mm/s 28 mm/s 16 mm/s 24 mm/s 12 mm/s 28 mm/s 16 mm/s 24 mm/s ANSWER DOWNLOAD EXAMIANS APP
Fluid Mechanics A 2" gate valve fitted in a pipe is replaced by a similar globe valve. Pressure drop in gate valve was Δp. For the same discharge, the pressure drop across globe valve is > Δp Δp Δp² < Δp > Δp Δp Δp² < Δp ANSWER DOWNLOAD EXAMIANS APP
Fluid Mechanics The ratio of actual discharge to theoretical discharge through an orifice is equal to Cd/Cv Cc . Cd Cv . Cd Cc . Cv Cd/Cv Cc . Cd Cv . Cd Cc . Cv ANSWER DOWNLOAD EXAMIANS APP
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