Fluid Mechanics While starting an axial flow pump, its delivery valve should be kept Open Either open or closed None of these Closed Open Either open or closed None of these Closed ANSWER DOWNLOAD EXAMIANS APP
Fluid Mechanics In case of hydraulically smooth pipe, the resistance to flow depends only on the Reynolds number, whereas for a hydraulically rough pipe, the resistance to flow is governed by the relative roughness. Two pipes are said to have the same hydraulic roughness, when they have equal values of Absolute roughness Relative roughness All of these Friction co-efficient for flows at equal Reynold number Absolute roughness Relative roughness All of these Friction co-efficient for flows at equal Reynold number 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 Δp² < Δp Δp > Δp Δp² < Δp Δp ANSWER DOWNLOAD EXAMIANS APP
Fluid Mechanics The bulk modulus of elasticity of a liquid Is independent of temperature & pressure Decreases with pressure Is zero for incompressible liquid Increases with pressure Is independent of temperature & pressure Decreases with pressure Is zero for incompressible liquid Increases with pressure ANSWER DOWNLOAD EXAMIANS APP
Fluid Mechanics In case of turbulent flow of a Newtonion fluid in a straight pipe, the maximum velocity is equal to (where, Vavg = average fluid velocity) Vavg 1.5 Vavg 1.2 Vavg 1.8 Vavg Vavg 1.5 Vavg 1.2 Vavg 1.8 Vavg 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) x x/2 πx 2x x x/2 πx 2x ANSWER DOWNLOAD EXAMIANS APP