Fluid Kinematics MCQ with answer and solution

Concept

In steady flow, fluid properties like velocity at a point do not change with time.

Formula

∂V/∂t = 0 (steady flow)

Step-by-step solution

1. A change of velocity with respect to time decides steady or unsteady flow. 2. A change of velocity with respect to space (distance) decides uniform or non-uniform flow. 3. Here velocity does not change with time, so ∂V/∂t = 0. 4. So the flow is steady. Answer is B.

Explanation

When velocity at a point does not change with time, the flow is called steady flow. Uniform and non-uniform flow are about change of velocity with distance, not time.

Why the other options are wrong

A: Unsteady flow means velocity changes with time. C: Uniform flow means velocity does not change with distance (space), not time. D: Non-uniform flow means velocity changes with distance.

Shortcut

Time = steady/unsteady; Space = uniform/non-uniform.

Common mistake

Confusing steady flow (no change with time) with uniform flow (no change with space).