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Q. |
What kind of metals are used for milling operations? |
A. | soft and brittle |
B. | soft and elastic |
C. | hard and brittle |
D. | hard and elastic |
Answer» C. hard and brittle | |
Explanation: for the milling operation, normally hard brittle materials with fracture, deform and cold weld are used. the reason for choosing dense materials is the fact that the kinetic energy of balls depends upon their mass and velocity. |
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