For the preliminary breaking of hard rock, we use a
A. Gyratory crusher
B. Ball mill
C. Tube mill
D. Squirrel-cage disintegrator
Answer: Option A
A. Gyratory crusher
B. Ball mill
C. Tube mill
D. Squirrel-cage disintegrator
Answer: Option A
A. Rittinger's law
B. Kick's law
C. Bond's law
D. None of these
Traces of solids are removed from, liquid in a
A. Classifier
B. Clarifier
C. Sparkler filter
D. Rotary vacuum filter
Which of the following is not categorised as a "mechanical operation"?
A. Agitation
B. Filtration
C. Size enlargement
D. Humidification
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