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19.

An open cubical tank of 2 m side is filled with water. If the tank is rotated with an acceleration such that half of the water spills out, then the acceleration is equal to                        
A. g/3 B. g/2
C. 2g/3 D. g



20.

A right circular cylinder open at the top is filled with liquid and rotated about its vertical axis at such a speed that half the liquid spills out, then the pressure intensity at the center of bottom is                        
A. zero B. one-fourth its value when cylinder was full
C. one-half its value when cylinder was full D. cannot be predicted from the given data



21.

The horizontal component of force on a curved surface is equal to the                        
A. product of pressure intensity at its centroid and area B. force on a vertical projection of the curved surface
C. weight of liquid vertically above the curved surface D. force on the horizontal projection of the curved surface




22.

The eddy viscosity for turbulent flow is                        
A. a function of temperature only B. a physical property of the fluid.
C. dependent on the flow D. independent of the flow



23.

In a two dimensional incompressible steady flow around an airfoil, the stream lines are 2 cm apart at a great distance from the airfoil, where the velocity is 30 m/sec. The velocity near the airfoil, where the stream lines are 1.5 cm apart, is                        
A. 22.5 m/sec. B. 33 m/sec.
C. 40 m/sec. D. 90 m/sec.



24.

When the velocity distribution is uniform over the cross-section, the correction factor for momentum is                        
A. 0 B. 1
C. 3-Apr D. 2



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