60) What is the approximate cutting speed (in mm/minute) for turning dia 30 mm shaft, if spindle rotates at 300 RPM?

61) Determine the height of slip gauges if a sine bar (200 mm length) makes and angle of 30 degree

62) A taper is to be made (using tail stock offset method) in Dia 40 blank which is 100 mm length. Taper is limited to a length of 80 mm with a smaller end of Dia 38. What will be the tail stock offset?

63) A bolt is specified as M12 x 1.25g. Which feature of the thread will have the tolerance 5g?

64) What is the least count in a bevel protractor, if main scale graduations are 1 degree apart and number of graduations in Vernier scale is 12?