(a) Discuss briefly three (3) factors that must be known by a reactor designer in designing a reactor for an industrial process (6marks)

b) State two (2) methods used for measuring the size of fine particles (2marks)

c) A particle is subjected to several forces as it moves through a fluid. Explain the drag forces. Name the other two (2) forces (4marks)

(d) Particles sizes have direct influences on the properties of materials. Explain briefly on two (2) of these influences.(4marks)