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Which increased risk accompanies the use of smaller rollers to move a very massive stone block, despite using more rollers?

A)Increased ground pressure; stone fracture
B)Roller bearing overheating; seizure
C)Reduced static friction; rollback
D)Elevated stress concentrations; spalling

💡 Explanation

Smaller rollers cause elevated stress concentrations at contact points due to decreased surface area; thus, leading to spalling. This failure results because force equivalence leads to higher pressure, therefore spalling more likely, rather than lower risks from using additional rollers.

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