Asocket can be driven using any of the following except for (a) a socket ratchet
handle and extension bar (b) a ratchet head torque wrench (c) a combination
wrench (d) a flexible head socket wrench.

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)