59) A mild steel rod of dia 40 mm and length 100 mm has to be turned to dia 30 mm in one cut for full length using HSS tool with a feed rate of 0.1 mm/revolution. Determine the turning time with a speed of 200 rpm.

60) Assume that front clearance angle of a lathe tool is 8 degree and top rake is 15 degree. Then the wedge angle is

61) Calculate the amount of offset of tail stock for turning taper on full length of a job 12 inch long which is to have its two diameters as 2 inch and 1.5 inch ultimately.

62) A body in space free from all restraints have _____ degrees of freedom

63) The quick helix drill should never be used to drill