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.Management Sciences
Category: Mechanical Operations
Arrange the following size reduction equipment in the decreasing order of the average particle size produced by each of them ?
A. Jaw crusher, Ball mill, Fluid energy mill
B. Ball mill, Jaw crusher, Fluid energy mill
C. Fluid energy mill, Jaw crusher, Ball mill
D. Fluid energy mill, Ball mill, Jaw crusher
Which of the following mechanical conveyors does not come under the division „scrapers‟ ?
A. Ribbon conveyor
B. Flight conveyor
C. Bucket elevators
D. Drag conveyor
Use of grinding aids results in the ___________________?
A. Enhanced production rate
B. Finer products
C. Both A. & B.
D. Neither A. nor B.
Feed size of ≥ 25 cms can be accepted by _______________________?
A. Ball mill
B. Rod mill
C. Fluid energy mill
D. Jaw crusher
Grinding characteristic of a material is given by its___________________?
A. HGI
B. Angle of repose
C. Shatter index
D. Abrasion index
A _____________ mixer resembles a ball mill without balls?
A. Banbury
B. Pug mill
C. Tumbling
D. Pan
Pick out the wrong statement ?
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
During filtration operation, the filtrate encounters the resistance of the ___________________?
A. Filter medium
B. Cake
C. Channel carrying the slurry to the upstream side of the cake and filtrate away from the filter
medium
D. All A., B. and C.
Separation of solid suspended in liquid into a supernatant clear liquid and a denser slurry employs a process termed as the___________________?
A. Coagulation
B. Flocculation
C. Sedimentation
D. Clarification
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