Fluid Mechanics MCQs

Shear stress and velocity

Velocity gradient and pressure intensity

Shear stress and rate of angular deformation in a fluid

Pressure gradient and rate of angular deformation

Minimum liquid cross-section

More diameter compared to orifice diameter

Minimum velocity of fluid stream

None of these

Increasing the impeller speed and the volute area

Increasing the number of vanes in the impeller

Mounting of two or more impellers in series on a single shaft

Either of A, B or C

Parabola (vertex being at the opening)

Hyperbola

Horizontal straight line

Zig-zag path (which is geometrically undefined)

Turbine

Propeller

Diffuser

None of these

Produces only radial current

Produces only tangential current

Is effective over wide range of viscosities

Does not produce tangential current

Pressure reaches a minimum

Cross-section of the channel is reduced

Valve is closed in a pipeline

Velocity of sound is reached

Evaporation

Cavitation

Sublimation

Stripping

Long pipe at constant rate

Long pipe at decreasing rate

Expanding tube at increasing rate

Expanding tube at constant rate

Molten sodium (used as a coolant in Fast Breeder Reactor)

Moderately viscous vegetable oil used in soap industry

Thick molten soap at 80°C

None of the above