51) The value of side rake of the turning tool of geometry of 7-8-5-6-9-4-1 mm will be

52) Find the time requried for a slotting machine for making a complete cut on a plate 600x600 mm if the cutting speed is 8 meters/min, for the return time to cutting time ration 2:3 and feed 2mm/double stroke. Clearance at each end is 75 mm.

53) In a slotting machine, the cutting speed for a stroke length of 610 mm at 30 strokes per minute (return time to cutting time ration = 2:3) is

54) For Aluminium alloys, recommended rake angle for a milling cutter tool is

55) The quality of surface finish that can be achieved on a milling machine is