A. 1 – 2
B. 15 – 20
C. 40 – 50
D. 60 – 75
Related Mcqs:
- Reciprocating screens are normally inclined at an angle of 5° with the horizontal and employ gyratory motion at feed end & reciprocating motion at the discharge end. They are not suitable for the screening of the ___________________?
A. Light metal powder down upto 4 mesh size
B. Dry chemicals
C. Heavy tonnages of rocks or gravel
D. Powdered food & granular materials - Ultracentrifuges running at speeds upto 100000 rpm is normally used for the_____________________?
A. Separation of isotopes based on their density or molecular weights difference
B. Concentration of rubber latex
C. Separation of cream from milk
D. Dewaxing of lubricating oil - Vibrating screens have capacity in the range of ______________ tons/ft2 .mm mesh size?
A. 0.2 to 0.8
B. 5 to 25
C. 50 to 100
D. 100 to 250 - Trommels employ _____________ for screening of materials?
A. Fibrous cloth
B. Woven wire screen
C. Punched plate
D. None of these - Trommels separate a mixture of particles depending on their_____________________?
A. Size
B. Density
C. Wettability
D. Electrical & magnetic properties - ______________ mill is not a revolving mill ?
A. Pebble
B. Compartment
C. Cage
D. Tube - In case of a revolving mill, wet grinding compared to dry grinding__________________?
A. Requires more energy
B. Has less capacity
C. Complicates handling & classification of the product
D. None of these - Wet grinding in a revolving mill ______________ as compared to dry grinding ?
A. Gives less wear on chamber walls
B. Requires more energy
C. Increases capacity
D. Complicates handling of the product - A _____________ mill is a revolving mill divided into two or more sections by perforated partitions in which preliminary grinding takes place at one end and the finishing grinding at the discharge end?
A. Compartment
B. Tube
C. Rod
D. Pebble - Which of the following is not a revolving/tumbling mill used for size reduction ?
A. Compartment mill
B. Pebble mill
C. Cage mill
D. Rod mill
