a$)$ Explain the benefit of having a narrow particle size of

functional powder. How can you ensure that the particle size

distribution in spray processing is relatively narrow? $(7$

Marks$)$b$)$ Explain the challenges of spraying fine and highly

concentrated suspensions? How can you resolve these issues? $(7$

Marks$)$c$)$ State four spray parameters and explain how they influence

the spray particle sizes? $(6$ Marks$)$d$)$ Explain the hazards that need to be considered during fine

powder handling? $(5$ Marks$)$