Gradually varied flow is A. steady uniform B. non-steady non-uniform C. non-steady uniform D. steady non-uniform

The correct answer is: Gradually varied flow is steady non-uniform flow.

Steady flow is flow in which the velocity and other flow variables do not change with time. Non-uniform flow is flow in which the velocity and other flow variables change with position. Gradually varied flow is a type of non-uniform flow in which the changes in velocity and other flow variables occur gradually over a long distance.

Steady uniform flow is a type of flow in

which the velocity and other flow variables do not change with time or position. This type of flow is often used as a reference state for other types of flow.

Non-steady uniform flow is a type of flow in which the velocity and other flow variables do not change with position, but do change with time. This type of flow can occur, for example, when a fluid is flowing through a pipe and the flow rate is changed.

Gradually varied flow is a

type of flow in which the velocity and other flow variables change gradually over a long distance. This type of flow can occur, for example, when a fluid is flowing over a gradually sloping surface.

In conclusion, the correct answer is: Gradually varied flow is steady non-uniform flow.