41. A mandrel is used to hold
42. The tool may fail due to
43. The chamfering is an essential operation after
44. Tumbler gears in lathe are used to
45. Hardness of green sand mould increases with
46. Green sand mould indicates that
47. What is the type of welding defect caused due to poor deposition of weld rod is called?
48. A single point tool has
49. A drill bit of 20 mm diameter rotating at 500 r.p.m. with a feed rate of 0.2 mm/revolution is used to drill a through hole in a mild steel plate 20 mm thickness. The depth of cut in this drilling operation is
50. An important geometrical quantity in the cutting of metals which can be used as a criterion for machinability of metals is
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