When the temperature and humidity of air is low, we usually use _______________ draft cooling tower?
A. Natural
B. Forced
C. Induced
D. None of these
Correct Answer: Natural ✔
Last Updated: February 18, 2019
Related MCQs
- In case of liquid-liquid binary diffusion, diffusivity of one constituent into another is not dependent on the__________?
- Leaching of sugar from sugar beets is done by__________?
- In an absorber, HETP does not vary with the__________?
- Which of the following parameters remains almost constant during adiabatic saturation of unsaturated air ?
- Which of the following quantities need not be fixed before starting the design of a cocurrent absorber ?
- During drying operation, it is easier to remove the __________ moisture ?
- In extractive distillation, solvent is__________?
- At a fixed total pressure, humidity depends only on the __________?
- The mass diffusivity, the thermal diffusivity and the eddy momentum diffusivity are same for, NPr = NSc = __________?
- The diffusivity D. in a binary gas mixture is related to the temperature (T) as__________?
- The change in enthalpy per unit weight of adsorbed gas when adsorbed on gas free or “outgassed” adsorbent to from a definite concentration of adsorbate is called its__________?
- An Azeotropic mixture is a __________ mixture?
- Inside the distillation columns, the __________?
- Total reflux in a distillation operation requires minimum__________?
- Boiling point diagram is not affected by the ambient__________?
- Dry bulb temperature of unsaturated air is more than its __________ temperature?
- Inside the distillation column, the__________?
- A mixture of 10% C6H6 vapour in air at 25°C and 750 mm Hg has a dew point of 20°C. Its dew point at 30°C and 700 mm Hg will be around __________ °C?
- Chemisorption (chemical adsorption) is__________?
- The absorption factor is defined as (where, L = liquid flow rate, G = gas flow rate and, m = slope of the equilibrium line) ?
- When the feed to a distillation column is a saturated liquid, slope of the feed line is__________?
- Fenske-Underwood equation used for calculating the minimum number of theoretical plates in distillation column is valid for__________?
- Solvent used in extractive distillation__________?
- As the reflux ratio in a distillation column is increased from the minimum, the__________?
- Make up water is supplied during cooling tower operation to compensate for water losses due to__________?
- An ideal tower packing should not __________?
- Positive deviation from Raoult’s law means a mixture whose total pressure is__________?
- (NSh/NRe.NSc) is termed in mass transfer operation as the __________?
- The operating line for an absorber is curved, when plotted in terms of __________?
- One mole feed of a binary mixture of a given composition is flash vaporised at a fixed P and T. If Raoult’s law is obeyed, then changing the feed composition would effect ?
- The rate of solid-liquid extraction is limited by the__________?
- The rate of mass transfer is not dependent upon the__________?
- Gaseous diffusion co-efficient increases with increase in the__________?
- In case of steam distillation, the steam leaving the liquid is not completely saturated with distillate vapour, because__________?
- __________ temperature is the steady state temperature attained by a small amount of liquid evaporating into a large quantity of unsaturated gas-vapor mixture ?
- Heat load in a cooling tower__________?
- A good solvent used for absorption should not have very high__________?
- Dew point of a gas-vapour mixture__________?
- Deaeration (removal of O2) of water is done by__________?
- For __________ drying, the effects of velocity, temperature and humidity of the gas and the thickness of the solid are the same?
- Rate of leaching increases with increasing__________?
- The term “cooling range” in a cooling tower refers to the difference in the temperature of__________?
- When the liquid over a plate is of uniform concentration, then __________?
- The dimension of diffusivity is same as that of the__________?
- Diffusion in concentrated solutions differs from that in dilute solutions, because of the change in the __________ with the concentration of the solution?
- At minimum reflux ratio for a given separation__________?
- In the desorption of highly soluble gas from the liquid, the main resistance will be in the __________ phase?
- Which of the following is the most suitable for extraction in a system having very low density difference ?
- What is the reflux ratio at total reflux ?
- In case of gases, the binary diffusivity is proportional to (where, P = pressure) ?
- Air at a particular humidity is heated in a furnace. The new dew point__________?