21. The lathe centres are provided with standard taper known as
22. In ECM, the material removal is due to
23. The effective number of lattice points in the unit cell of simple cubic, body centered cubic, and face centered cubic space lattices, respectively, are
24. In abrasive jet machining, as the distance between the nozzle tip and the work surface increases, the material removal rate
25. Twist drills are made of
26. The cutting speed for drilling aluminium, brass and bronze with high speed steel drills varies from
27. The cutting speed for drilling copper with high speed steel drills varies from
28. Discontinuous chips are formed during machining of
29. Continuous chips with built up edge are formed during machining of
30. The operation of producing grooves around the periphery of a cylindrical or conical workpiece is called
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