Discussion
Crushers are the size reduction machineries. Which of the following is not a type of crusher?
Answer: C
The one that is not a crusher is Ball crushers.
Crushers are coarse size-reduction machines that break large lumps by compression. The standard types are jaw crushers, gyratory crushers and crushing rolls (roll crushers).
The machine with balls in a rotating drum is the ball mill, which grinds material to fine powder by impact and attrition. It is classed as a grinder or mill, not a crusher, and 'ball crusher' is not a standard machine.
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