An inventor claims to have developed an engine that does not use fuel but operates as a power cycle at steady state while receiving energy by heat transfer from the surrounding atmosphere and discharging energy by heat transfer to the surrounding atmosphere. This would be an excellent project to invest in.

a. True
b. False

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)