If x is the distance from leading edge, then the boundary layer thickness in laminar flow varies as________________?

Question: Boundary layer separation occurs when the
[A].

pressure reaches a minimum.

[B].

cross-section of the channel is reduced.

[C].

valve is closed in a pipeline.

[D].

velocity of sound is reached.

Answer: Option B

Explanation:

No answer description available for this question.

Question: In case of hydraulically smooth pipe, the resistance to flow depends only on the Reynolds number, whereas for a hydraulically rough pipe, the resistance to flow is governed by the relative roughness. Two pipes are said to have the same hydraulic roughness, when they have equal values of
[A].

relative roughness.

[B].

absolute roughness.

[C].

friction co-efficient for flows at equal Reynold number.

[D].

all (a), (b) & (c).

Answer: Option C

Explanation:

No answer description available for this question.

Question: In the low Reynolds number region, the drag force on a sphere is proportional to
[A].

V

[B].

V2

[C].

V4

[D].

V0.5

Answer: Option A

Explanation:

No answer description available for this question.

Question: Pascal law is not applicable for a/an __________ fluid.
[A].

accelerating frictionless

[B].

static

[C].

uniformly moving

[D].

none of these

Answer: Option D

Explanation:

No answer description available for this question.