Mechanical Operations

A. Reducing the filtration pressure
B. Accelerating the rate of filtration
C. Deplugging the filter medium
D. Enhancing the cake porosity in case of a dense impermeable cake

A. Cresylic acid
B. Copper sulphate
C. Calcium carbonate
D. Sodium carbonate

A. Continuously increases
B. Continuously decreases
C. Remain constant throughout
D. May increase or decrease; depends on the pressure

A. Coarse feed requires a larger ball
B. Fine feed requires a larger ball
C. Operating speed should be more than the critical speed
D. None of these

A. Coagulation
B. Flocculation
C. Sedimentation
D. Clarification

A. Have greater capacity per unit of discharge area
B. Crush intermittently
C. Are less suitable for coarse materials
D. Have less steady power consumption

A. More commonly used jaw crusher between Dodge jaw crusher and Blake jaw crusher is the
later one
B. There are only four methods namely compression, impact, attrition and cutting, which the size
reduction equipments employ
C. Cutting machines mainly employ ‘attrition’ for size reduction of solids
D. Operating principles of Dodge and Blake jaw crushers are combined in the working of
universal jaw crushers

A. Blake jaw
B. Toothed roll
C. Gyratory
D. None of these

A. Thickeners
B. Classifiers
C. Hydrocyclones
D. Decanters

A. Enhanced production rate
B. Finer products
C. Both A. & B.
D. Neither A. nor B.