Design Engineer Question:
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Surface endurance limit of gear material is dependent upon its

A. elastic strength
B. yield strength
C. brinell hardness number
D. toughness

Option C

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In leaf springs, the longest leaf is known as A. lower leaf B. master leaf C. upper leaf D. none of these	The toughness of a material __________ when it is heated. A. increases B. decreases C. does not change