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
__________ mills fall in the category of tumbling mills,
A Ball and pebble
B Rod and tube
C Compartment
D All of the above
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 are termed as impactors.
A Hammer
B Cage
C Rolling-compression
D None of these
__________ centrifuge is normally used in sugar mills.
A Tubular bowl
B Disc-bowl
C Suspended batch basket
D Perforated horizontal basket continuous
Colloidal mills are used for __________ grinding.
A Coarse
B Intermediate
C Fine
D Ultrafine
__________ baffles are provided in ball mills.
A Horizontal
B No
C Only two
D None of these
The materials which fracture even at small strains are termed as brittle, while those materials which exhibit an appreciable deformation before failure are termed as
A Rigid
B Tough
C Ductile
D Plastic
Choose the "appropriate preposition " to fill in the blank in the following sentence : " Mills and factories in our country throw poisonous chemicals and waste products __ water"
A to
B with
C into
D in
During the Industrial Revolution, the workers in mills and factories had a/an-
A favourable environment
B satisfactory environment
C accordant environment
D adverse environment

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