# Chemical Engineering - Fluid Mechanics

41.
A mixed flow centrifugal pump
employs such an impeller, through which the flow is a combination of radial & axial flow.
mixes the two fluids before pumping them.
pumps the two fluids separately and then mixes them.
employs impellers in both the radial & axial directions.
Explanation:
No answer description is available. Let's discuss.

42.
In centrifugal pump operation, the cavitation can be eliminated by maintaining suction pressure __________ the vapor pressure of the liquid at the suction temperature.
lower than
higher than
equal to
none of these
Explanation:
No answer description is available. Let's discuss.

43.
A rectangular surface 3' x 4', has the lower 3 edge horizontal and 6' below a free oil surface (sp. gr. 0.8). The surface inclination is 300 with the horizontal. The force on one side of the surface is(where, y = specific weight of water)
39.6y
48y
49.2y
58y
Explanation:
No answer description is available. Let's discuss.

44.
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
12 mm/s
16 mm/s
24 mm/s
28 mm/s