4 screens can separate 5 differently sized particles. The number of particle sizes that can be obtained from n number of screens is always n+1.

All of the mentioned industries use a centrifuge for their products.

Statement 1 is true. Diaphragm pump is an example of a positive displacement pump.

Multi-stage counter-current extraction is expensive as more extractors are needed to strip the solid off the solvent.

Blood is a Casson plastic. At low shears, they’ve infinite viscosity. At high shears, its viscosity decreases with increase in shear. Statement 2 is true.

All the mentioned are applications of mixing in the food industry.

In Penetration theory, mass transfer coefficient is proportional to D1/2 Penetration theory.

Horizontal tube evaporator is easy for cleaning as the evaporator part can be easily dismantled from the rest of the equipment parts. Horizontal tube evaporator has a disadvantage of hindering agitation of the feed as it is present outside the horizontal tubes.

The crushing efficiency is directly proportional to the surface created

Flash evaporators are used in recovering aroma from fruit juices. The juices are preheated and then flashed. The vapors are collected. They contain the aroma. These are made to condense onto a surface and hence the aroma is recovered.