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

Related Mcqs:

1. 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

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. 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

4. 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

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

   A. Less than
   B. More than
   C. Equal to
   D. None of these

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

   A. 1
   B. 1
   D. ∞

7. 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

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. Percentage saturation is _______________ the relative saturation?

   A. Always smaller than
   B. Always greater than
   C. Not related to
   D. None of these

10. 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