A valve is suddenly closed in a water main in wl.ich the velocity is 1 m/sec and velocity of pressure wave is 981 m/ sec. The inertia head at the valve will be________________?

Question: For flow past a flat plate, if x is the distance along the plate in the direction of flow, the boundary layer thickness is proportional to
[A].

x

[B].

1/x

[C].

x

[D].

1/x

Answer: Option A

Explanation:

No answer description available for this question.

Question: In turbulent flow, a rough pipe has the same friction factor as a smooth pipe
[A].

in the zone of complete turbulence.

[B].

when the roughness projections are much smaller than the thickness of the laminar film.

[C].

everywhere in the transition zone.

[D].

when the friction factor is independent of the Reynold’s number.

Answer: Option B

Explanation:

No answer description available for this question.

Question: The boundary layer is that part of a moving fluid, in which the fluid velocity is
[A].

affected by the fluid flow pressure.

[B].

constant.

[C].

affected by the presence of a solid boundary.

[D].

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

Answer: Option C

Explanation:

No answer description available for this question.

Question: A weir is used to measure the large water discharge rate from a river or from an open channel. A weir is not of __________ shape.
[A].

circular

[B].

rectangular

[C].

triangular

[D].

trapezoidal

Answer: Option A

Explanation:

No answer description available for this question.