Practice question
Question
In a typical grinding operation, 80% of the feed material passes through a sieve opening of 4.75 mm; whereas, 80% of the ground product passes through 0.5 mm opening. If the power required to grind 2 tonnes/h of the feed material is 3.8 kW, the work index of the material is _______. (rounded off to 2 decimal places) (NAT)
Explanation
Mechanistically, verbal and logical reasoning involves grammar, vocabulary and inference determine correct usage. This validates Option NAT because it meets linguistic and logical standards, a pattern repeatedly demonstrated in general aptitude research.
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