58) In forging operation, scarfing is the method of preparing pieces of metal for

59) The difference between length and breadth of a rectangle is 23m. If its perimeter is 206m, then its area is,

60) Hot forging lubricants are

61) A bolt is specified as M16x1.5x100. Number 1.5 stands for

62) _____ is a drop hammer used in forging