In washing type plate and frame filter press, the ratio of washing rate to the final filtrate rate is__________________?

A. Is defined as the ratio of surface area of a sphere having the same volume as the particle to the
actual surface area of the particle
B. Has the dimension of length
C. Is always less than 1
D. Is the ratio of volume of a sphere having the same surface area as the particle to the actual
volume of the particle

A. 3.6 W.D.V.ρ
B. 3.6 W.D.V
C. 3.6 W.V.ρ
D. 3.6 D.V.ρ

A. Classifiers
B. Thickeners
C. Rotary drum filters
D. Cyclones

A. 0.01 L.S
B. 0.087 L.S
C. L.S
D. L.S/0.087

A. > 1
B. < 1
C. 1
D. 2

A. Calls for relatively less energy for the smaller product particles, than does the Rittinger law
B. Is less realistic in estimating the power requirements of commercial crushers
C. States that the work required to form particle of any size from very large feed is proportional
to the square root of the volume to surface ratio of the product
D. States that the work required for the crushing is proportional to the new surface created