A) For an ideal fluid \[\mu =0.\] \[\rho =0\] constant, K =0
B) A floating body is in stable, unstable or neutral equilibrium according to as the metacentric height is zero, positive or negative.
C) The exact analysis of viscous flow problems can be made by Euler's equation
D) The most economical diameter of a pipe is the one for which the annual fixed cost and annual power cost (to overcome friction) are minimum.
Correct Answer: D
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