3. Liquid xylene (C8H10) is leaking from a container at a rate of 1 g/min. in air at a temperature of 25 *C and 1 atm. The Threshold Limit Value (TLV) for xylene is 100 PPM. It is decided to use an exhaust fan to keep the concentration of xylene below the TLV. What information is needed to design the exhaust fan

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)