A. Fluidised bed
B. Spouted bed
C. Tray
D. Vacuum rotary
Related Mcqs:
- A solid is being dried in the linear drying rate regime from moisture content Xo to XF. The drying rate is zero at X = 0 and the critical moisture content is the same as the initial moisture Xo. The drying time for M = (Ls/ARc) is (where, L = total mass of dry solid, A = total surface area for drying Rc = Constant maximum drying rate per unit area X = moisture content (in mass of water/mass of dry solids)) ?
A. M(Xo – XF)
B. M(Xo/XF)
C. M ln(Xo/XF)
D. MXo ln(Xo/XF) - A solid is being dried in the linear drying rate regime from moisture content Xo to XF. The drying rate is zero at X = 0 and the critical moisture content is the same as the initial moisture Xo. The drying time for M = (Ls/ARc) is (where, L = total mass of dry solid, A = total surface area for drying Rc = Constant maximum drying rate per unit area X = moisture content (in mass of water/mass of dry solids))_____________?
A. M(Xo – XF)
B. M(Xo/XF)
C. M ln(Xo/XF)
D. MXo ln(Xo/XF) - Large scale drying of sugar is done in a _______________ dryer?
A. Spouted bed
B. Tray
C. Rotary
D. Truck - For continuous drying of granular or crystalline material, the dryer used is the _______________ dryer?
A. Tunnel
B. Tray
C. Rotary
D. None of these - A 25 cm × 25 cm × 1 cm flat sheet weighing 1.2 kg initially was dried from both sides under constant drying rate conditions. It took 1500 seconds for the weight of the sheet to reduce to 1.05 kg. Another 1m × 1m × 1cm flat sheet of the same material is to be dried from one side only. Under the same constant drying rate conditions, the time required for drying (in seconds) from its initial weight of 19.2 kg to 17.6 kg is ____________________?
A. 1000
B. 1500
C. 2000
D. 2500 - Dryer widely used in a textile industry is ______________ dryer?
A. Festoon
B. Cylinder
C. Conveyor
D. Tunnel - 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 - Drying of a wet solid under constant drying conditions means the exposure of the wet solid to the air of constant______________________?
A. Humidity
B. Velocity
C. Temperature
D. All A., B. & C. - A solid material shows case hardening properties while drying. Which of the following should be controlled to control the drying process ?
A. Flow rate of inlet air
B. Relative humidity of outlet air
C. Humidity of inlet air
D. Temperature of the solid - The drying time between fixed moisture contents within the ‘constant rate period’ is proportional to (assuming that drying occurs from all surfaces of the solid) (where, T = thickness of the solid) ?
A. √T
B. T
C. T1.5
D. T3
