21. In centreless grinding, work place centre will be
22. In down milling, the thickness of chip is
23. In up milling, the thickness of chip is
24. When two main plates are kept in alignment butting each other and riveted with cover plate on both sides of the main plates with two rows of rivets in each main plate, the joint is known as _______ double cover butt joint.
25. As tool and work are not in contact in EDM process
26. Glazing in grinding wheels __________ cutting capacity.
27. Ceramic cutting tools are
28. The process of changing the shape of grinding wheel as it becomes worn due to breaking away of the abrasive and bond, is called
29. The relation between the tool life (T) in minutes and cutting speed (V) in m/min is (where n = An exponent, which depends upon the tool and workpiece and C = A constant)
30. What is the type of welding defect is caused due to stresses on heating and cooling called?
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