Fluid Mechanics The ratio of hydrodynamic boundary layer to thermal boundary layer thickness in case of liquid metals is 1 < 1 2 > 1 1 < 1 2 > 1 ANSWER DOWNLOAD EXAMIANS APP
Fluid Mechanics Net positive suction head (NPSH) of a centrifugal pump must be Equal to the vapour pressure of the liquid Less than barometric pressure Greater than the vapour pressure of the liquid Less than the vapour pressure of the liquid Equal to the vapour pressure of the liquid Less than barometric pressure Greater than the vapour pressure of the liquid Less than the vapour pressure of the liquid ANSWER DOWNLOAD EXAMIANS APP
Fluid Mechanics Priming of a centrifugal pump is done to Develop effective pressure rise by the pump None of these Increase the mass flow rate of fluid Avoid chances of separation inside the impeller Develop effective pressure rise by the pump None of these Increase the mass flow rate of fluid Avoid chances of separation inside the impeller ANSWER DOWNLOAD EXAMIANS APP
Fluid Mechanics For water, when the pressure increases, the viscosity Also increases Decreases First decreases, and then increases Remains constant Also increases Decreases First decreases, and then increases Remains constant ANSWER DOWNLOAD EXAMIANS APP
Fluid Mechanics Permanent pressure loss in a well designed venturimeter is about __________ percent of the venturi differential. 30 1 50 10 30 1 50 10 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 All of these Absolute roughness Friction co-efficient for flows at equal Reynold number Relative roughness All of these Absolute roughness Friction co-efficient for flows at equal Reynold number Relative roughness ANSWER DOWNLOAD EXAMIANS APP
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