Which is a preventive measure to prevent hazards while working with power lines? ооо a) b) c) Use only nonconductive tools and materials. Ground lines only if they are energized. Remain 50 feet from power lines.

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)