Fluid Mechanics
The equation given below is called the __________ . f-0.5 = 4.07 loge (NRe√f)-0.6

None of these
Fanning equation
Colebrook formula
Von-Karman equation

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Fluid Mechanics
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

24 mm/s
28 mm/s
16 mm/s
12 mm/s

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Fluid Mechanics
Vane anemometer

Is a variable head meter
Is an area meter
None of these
Rotates an element at a speed determined by the velocity of the fluid in which the meter is immersed

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Fluid Mechanics
Turbine impeller

Produces only radial current
Is effective over wide range of viscosities
Produces only tangential current
Does not produce tangential current

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