Question

CENTRIFUGATION Situation 10 - A centrifuge with a basket 450 mm in diameter and rotating at 80 Hz processes an aqueous suspension consisting of particles with a density of 2,500 kg/cu.m., ranging in size of 1-10 m. The suspension forms a layer 75 mm thick in the basket. Take the smallest diameter as basis and the radius of the inner surface of the liquid at 0.15 m and viscosity of water at 0.001N sec/sq.m. 65. What is the angular velocity of the basket? A. 504.2 rad/sec C. 507.2 rad/sec B. 500.7 rad/sec D. 502.7 rad/sec 66. What should be the Reynolds number? A. 0.46 C. 0.76 B. 0.64 D. 0.54 67. How long will it take for the smallest particle to settle out? A. 19.3 sec C. 21.3 sec B. 20.9 sec D. 18.9 sec

          CENTRIFUGATION
Situation 10 - A centrifuge with a basket 450 mm in diameter and rotating at 80 Hz processes an aqueous suspension consisting of particles with a density of 2,500 kg/cu.m., ranging in size of 1-10 m. The suspension forms a layer 75 mm thick in the basket. Take the smallest diameter as basis and the radius of the inner surface of the liquid at 0.15 m and viscosity of water at 0.001N sec/sq.m.
65. What is the angular velocity of the basket?
A. 504.2 rad/sec C. 507.2 rad/sec
B. 500.7 rad/sec D. 502.7 rad/sec
66. What should be the Reynolds number?
A. 0.46 C. 0.76
B. 0.64 D. 0.54
67. How long will it take for the smallest particle to settle out?
A. 19.3 sec C. 21.3 sec
B. 20.9 sec D. 18.9 sec

CENTRIFUGATION
Situation 10 - A centrifuge with a basket 450 mm in diameter and rotating at 80 Hz processes an aqueous suspension consisting of particles with a density of 2,500 kg/cu.m., ranging in size of 1-10 m. The suspension forms a layer 75 mm thick in the basket. Take the smallest diameter as basis and the radius of the inner surface of the liquid at 0.15 m and viscosity of water at 0.001N sec/sq.m.
65. What is the angular velocity of the basket?
A. 504.2 rad/sec C. 507.2 rad/sec
B. 500.7 rad/sec D. 502.7 rad/sec
66. What should be the Reynolds number?
A. 0.46 C. 0.76
B. 0.64 D. 0.54
67. How long will it take for the smallest particle to settle out?
A. 19.3 sec C. 21.3 sec
B. 20.9 sec D. 18.9 sec

Added by Kristin N.

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