Dried finished product sampled from various parts of a ________________ dryer exhibits nonuniformity in the moisture content?

Related Mcqs:

1. 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)

2. 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)

3. It takes 6 hours to dry a wet solid from 50% moisture content to the critical moisture content of 15%. How much longer it will take to dry the solid to 10% moisture content, under the same drying conditions? (The equilibrium moisture content of the solid is 5%) ?

   A. 15 min
   B. 51 min
   C. 71 min
   D. 94 min

4. Equilibrium moisture of a solid is equal to the total moisture minus free moisture. Which of the following substances will have maxi-mum equilibrium moisture ?

   A. Anthracite coal
   B. Rag paper
   C. Bamboo
   D. Inorganic solids

5. Sticky material can be dried in a ________________ dryer ?

   A. Tray
   B. Rotary
   C. Fluidised bed
   D. None of these

6. Refractory bricks are usually dried in a ________________ dryer?

   A. Tray
   B. Tunnel
   C. Conveyor
   D. Festoon

7. For continuous drying of granular or crystalline material, the dryer used is the _______________ dryer?

   A. Tunnel
   B. Tray
   C. Rotary
   D. None of these

8. Dryer widely used in a textile industry is ______________ dryer?

   A. Festoon
   B. Cylinder
   C. Conveyor
   D. Tunnel

9. Moisture contained by a substance in excess of the equilibrium moisture is called the _______________ moisture?

   A. Unbound
   B. Free
   C. Critical
   D. Bound

10. Below is given an equilibrium moisture curve of a substance. State which regions represent free moisture and unbound moisture respectively ?

    A. II, III
    B. II, IV
    C. IV, III
    D. IV, II