Two short shafts having identical diameters of 38.1 mm and rotating at 400 rpm are connected by a flange coupling having 4 bolts with a 100 mm bolts circle diameter. the design shearing stress of the bolt is 12 mpa and design compressive stress of the flange is 15 mpa. a) what is the power transmitted by the short shaft in kw? b) what diameter of bolts should be used, in mm? c) how thick should the flange be, in mm?

Amixture of slurry and mud is to be pumped through a horizontal pipe of diameter 500 mm. the fluid behaves as a bingham plastic with a yield stress of 30 pa and viscosity 0.04 pa. s. describe the effects of the shear stress through a transverse section of the pipe by plotting the variation in shear stress and velocity profile: (i) just before the slurry starts to move (ii) as the slurry flows when the pressure gradient is double that in part (i)