23. Which of the following must be followed by the flow of a fluid (real or ideal)?

(I) Newton's law of viscosity.

(II) Newton's second law of motion.

(III) The continuity equation.

(IV) Velocity of boundary layer must be zero relative to boundary.

(V) Fluid cannot penetrate a boundary.

(I) Newton's law of viscosity.

(II) Newton's second law of motion.

(III) The continuity equation.

(IV) Velocity of boundary layer must be zero relative to boundary.

(V) Fluid cannot penetrate a boundary.

26. Mass velocity in case of steady flow and through a constant cross-section conduit is independent of the

27. For pipes that must be broken at intervals for maintenance, the connector used should be a/an

28. With the increase in depth, the hydrostatic pressure in an unaccelerated incompressible fluid (in a constant gravitational field)

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