A. Spray dryer
B. Spouted bed dryer
C. Tunnel dryer
D. Pan open to atmosphere
Correct Answer: Spray dryer ✔
Last Updated: February 17, 2019
Related MCQs
- 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__________?
- Selectivity of the solvent used in solvent extraction should be)__________?
- Nitrobenzene (boiling point = 210.6°C) is steam distilled at 1 atm pressure. Nitrobenzene will distil off __________ °C?
- Molecular sieves are porous__________?
- In liquid-liquid extraction, the number of phases at plait point is __________?
- JD factor for mass transfer is a function of Reynolds number. Mass transfer by molecular diffusion from a single drop to surrounding still air is given by__________?
- If the overall efficiency and Murphree plate efficiency are equal, then both the equilibrium and operating lines are__________?
- Condensation of a vapour-gas mixture just begins, when (where, p = partial pressure of the vapour P = vapour pressure of the liquid) ?
- Wetted wall tower experiment determines the__________?
- Can a cooling tower cool water below the wet bulb temperature of inlet air ?
- The rough value of diffusion co-efficient of water vapor into air at 25°C may be about __________ cm2/sec?
- In a distillation operation, what is the effect of the temperature of the reflux stream (given below) on the condenser and reboiler loads? Reflux conditions: (i) Reflux stream is completely liquid and is at its bubble point. (ii) Reflux stream is below its bubble point ?
- __________ column is used in gas absorption process ?
- The diffusion co-efficient in m2/s. of acetic acid in benzene (liquid in liquid) is__________?
- The ‘shanks system’ of leaching (i.e., counter-current multiple contact leaching) is used for__________?
- Which of the following employs an accessory known as ‘drift eliminator’ ?
- The term “approach” in a cooling tower refers to the difference in the temperature of the__________?
- Below is given an equilibrium moisture curve of a substance. State which regions represent free moisture and unbound moisture respectively ?
- Humid volume, at a given temperature is a/an __________ function of humidity?
- Flooding in a vapor-liquid contacting equipment occurs in a tray, when the pressure drop through a tray is __________ the liquid head available in the downcomer?
- Which of the following is an undesirable characteristic for the solvent used in gas absorption ?
- For the same feed, feed quality and separation (in a distillation column), with the increase of total pressure, the number of ideal plates will__________?
- A liquid mixture contains 30% o-xylene, 60% p-xylene and 10%. m-xylene (all percentages in w/w). Which of the following statements would be true in respect of this mixture ?
- In case of binary distillation, increasing the reflux ratio above optimum does not result in the increase of__________?
- Which of the following assumes constant molal vaporisation and overflow ?
- Which of the following binary systems is an example of a maximum boiling azeotrope ?
- Channelling is most severe__________?
- Extraction of coffee from its seed is done by__________?
- When the liquid phase and vapour phase of a binary system obeys Raoult’s and Dalton’s law respectively, the relative volatility is the ratio of__________?
- Flooding in a column results due to__________?
- Raoult’s law is applicable to the__________?
- Calcium ammonium nitrate (a fertiliser) is dried in a __________ dryer?
- Pick out the system with minimum boiling azeotrope at 1 atm ?
- The film penetration model of mass transfer was enunciated by__________?
- (NRe . NSc) is termed in mass transfer operation as the __________ number?
- In McCabe-Thiele method, at infinite reflux ratio__________?