The continuity equation

A.relates mass rate of flow along a stream tube
B.expresses the relation between energy and work
C.requires that the Newtons second law of motion is satisfied at every point in the fluid
D.relates the momentum per unit volume for two point on a stream line

Critical speed of turbine is

A.Same as maximum operating speed
B.Same as run away speed
C.The speed at which shaft will break
D.The speed at which the number of natural vibrations or natural frequency equals the number of revolutions per minute
E.The speed equal to synchronous speed of generator