The values of minimum and maximum clearance respectively for the following dimensions of mated parts according to basic hole system is (Hole: 37.50-37.52 mm Shaft: 37.47-37.45 mm)

47) P and Q represents _____ fit respectively

48) For selecting the gears for single start thread cutting, the formula used is

49) Determine the angle set if the height of slip gauges used is 100mm with a sine bar of 200 mm length

50) In order to align a machine bed of 2.5m length, a spirit level with a sensitivity of 0.2mm/m shows a deflection of 3 graduation marks. What is the thickness of the shim to be placed underneath one end of the machine bed to make the bed horizontal