Moisture contained by a substance in excess of the equilibrium moisture is called the _______________ moisture?
A. Unbound
B. Free
C. Critical
D. Bound
Month: February 2019
In case of ______________ distillation, a solvent is added to alter the relative volatility of the mixture to be separated?
In case of ______________ distillation, a solvent is added to alter the relative volatility of the mixture to be separated?
A. Molecular
B. Azeotropic
C. Extractive
D. Flash
If the specific heats of a gas and a vapor are 0.2KJ/Kg.°K and 1.5 KJ/Kg.°K respectively, and the humidity is 0.01; the humid heat in KJ/°Kg. is________________?
If the specific heats of a gas and a vapor are 0.2KJ/Kg.°K and 1.5 KJ/Kg.°K respectively, and the humidity is 0.01; the humid heat in KJ/°Kg. is________________?
A. 0.31
B. 0.107
C. 0.017
D. 0.215
If the path of liquid across the plate is very long as in case of large diameter tower, Murphree efficiency can be _______________ percent?
If the path of liquid across the plate is very long as in case of large diameter tower, Murphree efficiency can be _______________ percent?
A. 100
B. > 100
C. < 100
D. None of these
McCabe-Thiele method________________?
McCabe-Thiele method________________?
A. Uses molal units for material and energy balance
B. Uses weight fractions to express liquid and vapour composition
C. Can use any type of units
D. Is more accurate than Ponchon-Savarit method
The relation, Sc = Pr = 1, is valid, when the mechanism of ______________ transfer is same?
The relation, Sc = Pr = 1, is valid, when the mechanism of ______________ transfer is same?
A. Heat and mass
B. Mass and momentum
C. Heat and momentum
D. Heat, momentum and mass
Dew point of an air-water vapor mixture_________________?
Dew point of an air-water vapor mixture_________________?
A. Decreases with decrease in pressure
B. At constant humidity & total pressure is fixed
C. Corresponding to any point on the humidity chart is obtained by projecting a line through this
point parallel to the temperature axis and to the saturation curve
D. All A , B. & C.
The value of Lewis number (Le = Sc/Pr) for air-water vapour system is around_________________?
The value of Lewis number (Le = Sc/Pr) for air-water vapour system is around_________________?
A. 1
B. 0.24
C. 3.97
D. 600
Unsaturated air (with dry bulb temperature and dew point being 35°C and 18°C respectively) is passed through a water spray chamber maintained at 15°C. The air will be cooled_________________?
Unsaturated air (with dry bulb temperature and dew point being 35°C and 18°C respectively) is passed through a water spray chamber maintained at 15°C. The air will be cooled_________________?
A. And humidified
B. And dehumidified with increase in wet bulb temperature
C. At the same relative humidity
D. And dehumidified with decrease in wet bulb temperature
The equilibrium liquid composition compared to the vapor composition in case of________________?
The equilibrium liquid composition compared to the vapor composition in case of________________?
Azeotropic mixture is
A. More
B. Less
C. Same
D. Either more or less; depends on the system