Free surface of a liquid behaves like a sheet and tends to contract to smallest possible area due to the_________________?

Question: A bed of spherical particles (specific gravity 2.5) of uniform size 1500 μm is 0.5 m in diameter and 0.5 m high. In packed bed state, the porosity may be taken as 0.4. Ergun’s equation for the above fluid-particle system (in SI units) is given below : Δ P/L = 375 x 103 VOM + 10.94 x 106 V2OM (SI units) If water is to be used as the fluidising medium, the minimum fluidisation velocity, VOM is
[A].

12 mm/s

[B].

16 mm/s

[C].

24 mm/s

[D].

28 mm/s

Answer: Option B

Explanation:

No answer description available for this question.

Question: In case of a rotameter, the density of the float material is __________ that of the liquid it replaces.
[A].

more than

[B].

less than

[C].

equal to

[D].

either (a) or (b)

Answer: Option A

Explanation:

No answer description available for this question.

Question: In Newton’s law range, the drag co-efficient for the motion of spherical particle in a stationary fluid is
[A].

0.44

[B].

0.044

[C].

4.4

[D].

44

Answer: Option A

Explanation:

No answer description available for this question.

Question: Flow measurement in an open channel is done by a/an
[A].

venturimeter

[B].

orificemeter

[C].

weir

[D].

rotameter

Answer: Option C

Explanation:

No answer description available for this question.

Question: In case of a centrifugal pump, the theoretical head developed is dependent on the __________ the impeller.
[A].

speed of

[B].

diameter of

[C].

fluid velocity leaving

[D].

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

Answer: Option D

Explanation:

No answer description available for this question.

Question: Check valves are used
[A].

at high pressure.

[B].

in bends.

[C].

for controlling water flow.

[D].

for unidirectional flow.

Answer: Option D

Explanation:

No answer description available for this question.