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Prandtl number for water at 20°C is about ________________?
Related MCQs
The difference of wet bulb temperature and adiabatic saturation temperature of unsaturated mixture of any system is__________?
1 kg of a saturated aqueous solution of a highly soluble component A at 60°C is cooled to 25°C. The solubility limits of A are (0.6 kgA/kg water) at 60°C and (0.2 kgA/kg water) at 25°C. The amount in kg of the crystals formed is__________?
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As per Gilliland’s equation, the diffusivity is__________?
Pick out the wrong statement ?
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Small dia distillation column can be a __________?
In a solution containing 0.30 Kg mole of solute and 600 kg of solvent, the molality is__________?
The wetted wall tower is used to determine__________?
Low viscosity absorbent is preferred for reasons of __________?
For absorbing a sparingly soluble gas in a liquid __________?
In distillation columns, the number of bubble caps per tray primarily depends upon the__________?
The reciprocal of stripping factor is termed as __________?
Mass transfer co-efficient of liquid is__________?
If f = moles of vapour present per mole of feed, then the slope of feed line is (McCabe- Thiele method) __________?
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Relative humidity is the ratio of the__________?
As complete saturation of an adsorbent is approached, the differential heat of adsrop-tion approaches __________?
Which of the following solutions will follow Raoult’s law most closely ?
Mass transfer rate between two fluid phases does not necessarily depend on the __________ of the two phases?
In a counter-current liquid extractor__________?
On moving the feed line (q-line) from saturated liquid feed (vertical position) to saturated vapor feed (horizontal feed), if the slope of both the operating lines are to be increased, then it will result in__________?
Mass transfer co-efficient (K) and diffusivity D. are related according to film theory as__________?
The caking of crystals can be prevented by __________?
In distillation, overhead product contains __________?
Absorption accompanied with chemical reaction is exemplified by the absorption of__________?
Under conditions of flooding in packed tower, the gas pressure drop__________?
Absorption factor is defined as (where, S1 = slope of the operating line S2 = slope of the equilibrium curve) __________?
Detergent solution is dried to a powder in a __________?
For the case of flow of air past a wet bulb thermometer (air water vapour system), the approximate value of h2/ky.Cz is around__________?
To increase the absorption factor, (where, G = gas flow rate, S = solvent flow rate) __________?
In a forced draft cooling tower, water is cooled from 95 to 80°F by exposure to air with a wet bulb temperature of 70°F. In this case, the__________?
Which of the following equipments is not used in liquid-liquid extraction ?
When the __________ the relative humidity of air decreases, despite an increase in the absolute humidity?
A solid material shows case hardening properties while drying. Which of the following should be controlled to control the drying process ?
With increase in the concentration of the adsorbate, the integral heat of adsorption__________?
Air initially at 101. 3 kPa and 40°C and with a relative humidity of 50%, is cooled at constant pressure to 30°C. The cooled air has a__________?
An alkaline solution is used to reduce the concentration of carbon dioxide in a stream from 10% to 0.1% by absorption with irreversible chemical reaction. The overall number of transfer units based on gas phase is ?
__________ columns are used for liquid dispersion in a continuous gas phase ?
The efficiency of a plate column will be maximum, when the flow is ideal __________ the plate?
Separation of a mixture of two gases by absorption in the liquid solvent depends upon the difference in their__________?
Priming in a distillation column__________?
The amount of steam required per unit quantity of distillate in case of steam distillation will be reduced by __________?
The dew point of a saturated gas phase equals the __________ temperature?
The relative humidity of air decreases in-spite of an increase in the absolute humidity, when the__________?
Prandtl number for water at 20°C is about ________________?
A. 7
B. 70
C. 0.7
D. 150
Correct Answer:
7
✔
Last Updated:
February 17, 2019