The non-traditional machining process that essentially
requires vacuum is
A. electron beam machining
B. electro chemical machining
C. electro chemical discharge machining
D. electro discharge machining
Answer : Option AExplaination / Solution:
In electron- beam machining, vacuum conditions are
created/required for material removal, because electrons move
efficiently in vacuum.
For tool A, Taylor’s tool life exponent (n) is 0.45 and constant (K) is 90. Similarly
for tool B, n=0.3 and K=60. The cutting speed (in m/min) above which tool A will
have a higher tool life than tool B is
A. 26.7
B. 42.5
C. 80.7
D. 142.9
Answer : Option AExplaination / Solution: No Explaination.