Related Questions

Size reduction of the __________ can be suitably done by ball mills, crushing rolls and rod mills.
A Metalliferrous ores
B Non-metallic ores
C Basic slags
D Asbestos & mica
Gravity stamp mill is meant for the __________ crushing.
A Primary
B Intermediate
C Fine
D Ultrafine
Ball mills and tube mills with flint or porcelain balls are used for size reduction of
A Asbestos
B Rubber
C Non-metallic ores
D Limestone
__________ mills fall in the category of tumbling mills,
A Ball and pebble
B Rod and tube
C Compartment
D All of the above
What is the usual value of angle of nip for crushing of ordinary rock in smooth steel crushing rolls?
A 16°
B 32°
C 40°
D 46°
Choke crushing (in case of a Jaw crusher) compared to free crushing
A Results in increased capacity
B Consumes less power
C Consumes more power
D Both A and C
For crushing of solids, the Rittinger's law states that the work required for crushing is proportional to
A The new surface created
B The size reduction ratio
C The change in volume due to crushing
D None of these
Which of the following pictures was depicted in the first postage stamp of Bangladesh after the Liberation war in 1971?
A Water Lilly flower
B Jackfruit
C Royal Bangal Tiger
D Martyr Monument
In Sajib's collection, Bangladeshi stamp is 3 times more than the stamps of other countries . Which of the following cannot be the number of stamps in Sajib's collection ?
A 96
B 72
C 54
D 32
Which one of the five is least like the other? STAMP-PEN-ENVELOPE-BOOK-MAIL
A Pen
B Book
C Mail
D None of these

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