The pulverization is completed by a combination of crushing impact and _______ between grinding surfaces.(a) Accretion(b) Erosion(c) Attrition(d) DissolutionI had been asked this question by my school teacher while I was bunking the class.This question is from Pulverised Mills topic in portion Steam Power Plant of Energy Engineering

The pulverization is completed by a combination of crushing impact and

1.	The pulverization is completed by a combination of crushing impact and _______ between grinding surfaces.(a) Accretion(b) Erosion(c) Attrition(d) DissolutionI had been asked this question by my school teacher while I was bunking the class.This question is from Pulverised Mills topic in portion Steam Power Plant of Energy Engineering
Answer» CORRECT option is (c) Attrition The explanation is: The pulverization is completed by a COMBINATION of crushing IMPACT and attrition between grinding surfaces. The coal is crushed between two moving surfaces: balls and races. The upper stationary RACE and lower rotating race is driven by a WORM and gear, hold the balls between them.

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