0 points) i) Explain the grain-size-reduction strengthening strategy and precipitation strengthening strategy in a metallic material. (10) ii) What is the role of dislocations in metallic materials? Show schematically a screw and an edge dislocation in an FCC crystal with slip plane and slip direction and depict their Burger vectors and its dislocation line orientations respectively.

Inadequate stores control is not an obstacle to effective work order system. (clo4) 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)

In general, how do thermosetting plastics compare to thermoplastics in mechanical and physical properties?