MCQs on Evaporation

MCQs on Evaporation.

 

MCQs Evaporation.

Test

 

1. Rate of evaporation is______: ,
   1.   directly proportional to temperature of liquid
   2.   inversely proportional to temperature of liquid
   3.   independent of temperature of liquid
   4.   directly proportional to humidity of surrounding air
2. Which of the following factors do not affect the rate of evaporation?
   1.   Temperature of liquid
   2.   Humidity of surrounding air
   3.   Depth of liquid
   4.   Surface of liquid
3. Source of heat in most of the evaporator:
   1.   Coal
   2.   Steam
   3.   Hot Water
   4.   Hot Oil
4. Hormones, antibiotics & enzymes are:
   1.   Heat-sensitive
   2.   Cold-sensitive
   3.   Volatile
   4.   None of these
5. Greater the surface area of the liquid, the evaporation will be:,
   1.   Slow
   2.   Greater
   3.   Not affected
   4.   Both (a) & (b)
6. Which of the following Equipment is best for evaporating concentrated aqueous and thermostable liquors:
   1.   Horizontal Tube evaporator
   2.   Triple effect evaporator
   3.   Climbing Film Evaporator
   4.   Evaporating Pan
7. Evaporator used to manufacture cascara extract, sugar, salt, caustic soda etc is,
   1.   Vertical Tube evaporator
   2.   Triple effect evaporator
   3.   Climbing Film Evaporator
   4.   None of these
8. Vertical Tube evaporator is also known as,
   1.   Horizontal Tube evaporator
   2.   Basket type evaporator
   3.   Short Tube Evaporator
   4.   Rising Film Evaporator
9. When the feed is high viscosity, following evaporator should be used,
   1.   Climbing Film Evaporator
   2.   Falling Film evaporator
   3.   Horizontal Tube Evaporator
   4.   Short Tube evaporator
10. Evaporator working on basis of Pump or pressure,
    1.   Climbing Film Evaporator
    2.   Triple effect evaporator
    3.   Horizontal Tube Evaporator
    4.   Forced Circulation Evaporator
11. Which evaporator can be modified to Triple effect Evaporator/ Multiple effect evaporator?
    1.   Vertical Tube Evaporator
    2.   Forced Circulation evaporator
    3.   Horizontal Tube Evaporator
    4.   None of the above
12. In which process, concentrated liquid remains as the final product?
    1.   Distillation
    2.   Evaporation
    3.   Crystallization
    4.   Drying
13. Statement related to the process of evaporation that is incorrect is.
    1.   Evaporation occurs at any temperature
    2.   Evaporation takes place within liquid
    3.   Temperature may change during evaporation
    4.   No bubbles are formed in liquid during evaporation
14. Rate of evaporation increases as .......
    1.   exposed surface area of liquid increases
    2.   exposed surface area of liquid decreases
    3.   movement of air above surface of liquid decreases
    4.   Atmospheric pressure increases.
15. Evaporation occurs only,
    1.   After boiling the liquid.
    2.   At the surface of liquid.
    3.   After cooling the liquid.
    4.   If boiling occurs at atmospheric pressure.