Q 28. Two cutting tools are being compared for a machining operation. The tool life
equations are:
where V is the cutting speed in m/min and T is the tool life in min. The carbide
tool will provide higher tool life if the cutting speed in m/min exceeds
(A) 15.0
(B) 39.4
(C) 49.3
(D) 60.0
Answer: (B )
Explanation:
