Q1: Sticky material can be dried in a __________ dryer.

ANS:A - tray

Sticky material can be dried in a fluidized bed dryer. Fluidized bed dryers are particularly suitable for drying sticky materials because of their unique operating principle. In a fluidized bed dryer, hot air is passed through a perforated plate or grid at the bottom of a chamber, causing the solid particles to become suspended or fluidized in the airstream. This creates a fluid-like behavior of the solid particles, allowing for excellent mixing and heat transfer. Sticky materials, which tend to agglomerate or clump together during drying, can be effectively dried in a fluidized bed dryer because the constant movement of the particles prevents them from sticking to each other or to the dryer walls. Additionally, the high turbulence within the fluidized bed promotes rapid evaporation of moisture from the surface of the sticky material, resulting in efficient drying.