169) The flow in which each liquid particle has a definite path and their paths do not cross each other is called

170) The flow in which conditions do not change with time at any point, is known as

171) The flow in which the velocity vector is identical in magnitude and direction at every point, for any given instant, is known as

172) The flow in which the particles of a fluid attain such velocities that vary from point to point in magnitude and direction as well as from instant to instant, is known as

173) Flow occurring in a pipeline when a valve is being opened is