Q2) A gear box is to be designed to reduce the input speed of 4800 rpm to 30 rpm. Available modules are 5mm, 8 mm and 10 mm and available pressure angles are 20 and 25. The gear box should be as small in size as possible, without having the issue of interference. a) Clearly stating reasons, select appropriate module and pressure angle and design the gear box [7] b) Neatly sketch the drive [2] c) Find the contact ratio between the gears in the stage that has the largest reduction ratio [3] Z = (r + a) (r, cos} + (r + a} (r cos} C sind -