Multiple choice

In a machining experiment, tool life was found to vary with the cutting speed in the following manner:

The exponent (n) and constant (k) of the Taylor's tool life equation are

  1. n = 0.5 and k = 540

  2. n = 1 and k = 4860

  3. n = -1 and k = 0.74

  4. n = - 0.5 and k =1.155

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