quiz 2

A rotary drum dryer can be direct type and indirect type

• True

• False

What is the function of lifting flight in the rotary drum dryer?

• 1. rotate the feed material

• 1. increases hot ​air’s contact surface area within the material

• 1. increase efficiency of heat transfer between the material and the gas stream

• 1. to create the optimum conditions for evaporation

Which type of lifting flight is the most efficient ?

• straight

• angled

• semicircular

• right-angled

Rotary dryer are an ideal fit due to their

• high-capacity settings

• heavy-duty make-up

• able to tolerate abrasive materials

• all of the above

Which one of the following is not a part of a spray dryer ?

• atomizer

• cyclone separator

• spreader

• peristaltic pump

Spray dryer requires a small floor space

• True

• False

Which one of the following is not a part of spray drying process

• pre-concentration

• heating

• atomization

• separation

___, ___ and ___ may be used for the final separation stage

• bag filters

• electrostatic precipitators

• scrubber

• cyclones