Related Questions

The wet bulb temperature is lower in dry air than in wet air at the same temperature. A dry bulb thermometer registers a higher temperature than a wet bulb thermometer except at __________ percent relative humidity.
A 0
B 100
C 50
D None of these
If 'blue' means 'green', green' means 'yellow' 'yellow' means 'orange', 'orange' means 'black', 'black' means 'white', 'white' means 'red', 'red' means 'pink', 'pink' means 'brown', 'brown' means 'grey', than what is the color of human blood?
A black
B red
C white
D orange
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 $$\sqrt {\text{T}} $$
B T
C T1.5
D T3
To remove all the moisture from a wet solid it requires exposure to __________ air.
A Perfectly dry
B Highly humid
C High temperature
D None of these
Exposure to mixtures of chemicals are greater than expected on the basis of effects of exposure to each chemical individually. This is known as
A Additives
B Antagonism
C Synergism
D Independent
Occurrence of 'case hardening' during drying of a high moisture solid cake __________ the drying rate.
A Increases
B Decreases
C Does not affect
D Exponentially increases
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
In the constant rate period of the rate of drying curve for batch drying,
A Cracks develop on the surface of the solid
B Rate of drying decreases abruptly
C Surface evaporation of unbound moisture occurs
D None of these
During constant rate drying period, vaporisation rate per unit drying surface area
A Decreases with time
B Increases with time
C Does not change with time
D Does not affect the moisture content of the wet solid
For the air water system under ambient conditions, the adiabatic saturation temperature and the wet bulb temperature are nearly equal, because
A Water has a high latent heat of evaporation
B Lewis number is close to unity
C They are always equal under all circumstances
D Solubility of the components of air in water is very small

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