Objective Question & Answer

Evaluation of the statements:

1. Incorrect

When the depth of flow changes abruptly over a short length of the channel, the flow is called Rapidly Varied Flow (RVF) (e.g., hydraulic jump).
Gradually Varied Flow (GVF) is the case in which depth changes gradually over a long distance.

2. Incorrect

If velocity, depth or discharge at a point changes with respect to time, the flow is unsteady.
Steady flow means that these quantities do not change with time.

3. Correct

When velocity, depth, slope or cross-section vary along the length of the channel, the flow is non-uniform.
(Uniform flow requires that these parameters remain constant along the channel.)