In a four high rolling mill, there are four rolls out of which

A. One is working roll and three are backing up rolls

B. Two are working rolls and two are backing up rolls

C. Three are working rolls and one is backing up roll

D. All of the four are working rolls

Answer: Option B

Solution(By Examveda Team)

In a four high rolling mill, there are four rolls out of which Two are working rolls and two are backing up rolls