41. The diaphragm moulding machine is used to
42. In a centrifugal casting method
43. The temperature of the inner luminous cone of neutral flame is about
44. The acetylene cylinder is usually painted with
45. The oxygen cylinder is usually painted with
46. The operation of cutting a cylindrical hole in a sheet of metal by the punch and die is called
47. A moving mandrel is used in
48. The electrode tip diameter (d) in spot welding should be equal to (where t = Thickness of plate to be welded)
49. Which of the following statement is wrong?
50. Which of the following statement is wrong?
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