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

51) What is the maximum radius of cylinder which can be made out of a regular square cross section rod with side 10 mm?

52) How many rectangular pieces of size 10 mm x 100 mm can be cut from a sheet of size 50 mm x 100 mm?

53) What is the turning time required in minutes for one complete cut on a piece of work 350mm long and 50mm in diameter if the feed is 0.5mm per revolution at 350 rpm

54) A drawing of a shaft specifies to turn the outer diameter to 20h6. What is the maximum permissible size of the shaft in mm