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25.

If the velocity is zero over half of the cross-sectional area and is uniform over the remaining half, then the momentum correction factor is                        
A. 1 B. 3-Apr
C. 2 D. 4



26.

If velocity is zero over l/3rd of a cross-section and is uniform over remaining 2/3rd of the cross-section, then the correction factor for kinetic energy is                        
A. 3-Apr B. 2-Mar
C. 4-Sep D. 27/8



27.

The continuity equation pi V,A,= p2V2A2 is based on the following assumption regarding flow of fluid
where pi and p2 are mass densities.                        
A. steady flow B. uniform flow
C. incompressible flow D. frictionless flow




28.

Which of the following velocity potentials satisfies continuity equation ?                        
A. x2y B. x2-y2
C. cosx D. x2 + y2



29.

The motion of air mass in a tornado is a                        
A. free vortex motion B. forced vortex motion
C. free vortex at center and forced vortex outside D. forced vortex at center and free vortex outside



30.

In a forced vortex motion, the velocity of flow is                        
A. directly proportional to its radial distance from axis of rotation B. inversely proportional to its radial distance from the axis of rotation
C. inversely proportional to the square of its radial distance from the axis of rotation D. directly proportional to the square of its radial distance from the axis of rotation



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