A. Lift and shower the solids thus exposing it thoroughly to the drying action of the gas
B. Reduce the residence time of solid
C. Increase the residence time of the solid
D. None of these
Related Mcqs:
- For continuous drying of granular or crystalline material, the dryer used is the _______________ dryer?
A. Tunnel
B. Tray
C. Rotary
D. None of these - Dryer widely used in a textile industry is ______________ dryer?
A. Festoon
B. Cylinder
C. Conveyor
D. Tunnel - Pick out the wrong statement pertaining to the rotary dryer ?
A. Flights (located in the inside shell of rotary dryer) lift the material being dried and shower it
down through the current of hot air/gases. It extends from the wall to a distance which is about
8-12% of the inside diameter of shell
B. Hold up of a rotary drier is defined as the fraction of the dryer volume occupied by the solid at
any instant. The best performance for rotary drier is obtained, when the hold up is in the range
of 0.05 to 0.15
C. Rotary dryer is suitable for drying sticky material
D. Recommended peripheral speed of a rotary drier is in the range of 10 to 30 metres/minute - Capacity of a rotary dryer depends on its __________________?
A. rpm
B. Inclination with ground surface
C. Both A. and B.
D. Neither A. nor B. - A slurry is to be dried to produce flaky solid. Which dryer would you recommend ?
A. Spray dryer
B. Drum dryer
C. Rotary dryer
D. Dielectric dryer - Large scale drying of wheat is done in a ________________ dryer?
A. Fluidised bed
B. Spouted bed
C. Tray
D. Vacuum rotary - Calcium ammonium nitrate (a fertiliser) is dried in a _________________ dryer?
A. Rotary
B. Vacuum
C. Tunnel
D. Tray - In paper industry, paper is dried in a _____________ dryer ?
A. Tunnel
B. Heated cylinder
C. Conveyor
D. Festoon - Sticky material can be dried in a ________________ dryer ?
A. Tray
B. Rotary
C. Fluidised bed
D. None of these - For achieving rapid drying rate in a spray dryer, the diameter of the particles in the feed should be in the range of _______________ microns (1 mm = 1000 microns)?
A. 1-5
B. 10-60
C. 200-300
D. > 500
