Dry bulb temperature of the gas is _____________ the wet bulb temperature?

Related Mcqs:

1. The wet and ‘dry bulb temperature for a vapour-gas mixture are 25°C and 30°C respectively. If the mixture is heated to 45°C at constant pressure, the wet bulb temperature will be ______________ °C ?

   A. 25
   B. > 25
   C. < 25
   D. – 25

2. The wet and ‘dry bulb temperature for a vapour-gas mixture are 25°C and 30°C respectively. If the mixture is heated to 45°C at constant pressure, the wet bulb temperature will be ______________ °C?

   A. 25
   B. > 25
   C. < 25
   D. – 25

3. Wet bulb and dry bulb temperatures becomes identical at _______________ percent saturation curve?

   A. 100
   B. 50
   C. 78
   D. None of these

4. Unsaturated air (with dry bulb and wet bulb temperatures being 45°C and 25°C respectively) is passed through a water spray chamber maintained at 23°C. The air will be cooled and _________________?

   A. Humidified with wet bulb temperature decreasing
   B. Humidified at constant wet bulb temperature
   C. Dehumidified
   D. None of these

5. An air-water vapour mixture has a dry bulb temperature of 60°C and a dew point temperature of 40°C. The total pressure is 101.3 kPa and the vapour pressure of water at 40°C and 60°C are 7.30 kPa and 19.91 kPa respectively. The humidity of air sample expressed as kg of water vapour/kg of dry air is__________________?

   A. 0.048
   B. 0.079
   C. 0.122
   D. 0.152

6. The difference of wet bulb temperature and adiabatic saturation temperature of unsaturated mixture of any system is___________________?

   A. +ve
   B. -ve
   C. Zero
   D. None of these

7. When the psychometric ratio is ______________ then the adiabatic saturation temperature and wet bulb temperature becomes equal?

   A. 1
   B. 1
   D. ∞

8. 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

9. Unsaturated air (with dry and wet bulb temperatures being 35 and 25°C respectively) is passed through water spray chamber maintained at 35°C. The air will be__________________?

   A. Cooled
   B. Humidified
   C. Both A. & B.
   D. Dehumidified

10. If the solubilities of different components (in a liquid-liquid extraction system) increase with rise in temperature, then the temperature above which they dissolve completely is known as the critical solution temperature (CST or consolute temperature). If solubilities increase with decrease in temperature, then CST is the temperature below which they dissolve completely. If a binary system has no critical solution temperature, it implies that___________________?

    A. The system comprises of partially miscible liquids
    B. The system comprises of miscible liquids
    C. The system comprises of an azeotrope
    D. On heating, a vapor phase will appear; while on cooling, a solid phase will appear