- (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
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- (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) 35
- (B) 50
- (C) 70
- (D) 85
- (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
- (A) Compressible cakes and laminar
- (B) Incompressible cake and laminar
- (C) Compressible cake and turbulent
- (D) Incompressible cake and turbulent
- (A) 1.0
- (B) 0.5
- (C) 1.34
- (D) 4.34
