7291. Paper industry employs __________ driers.
Cylinder
Rotary
Spray
Fluidised bed
✅ The correct answer is option A.
Chemical Engineering
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7292. Which of the following is not a batch drier?
Truck drier
Agitated pan drier
Fluidised bed drier
Vacuum shelf drier
✅ The correct answer is option C.
7293. Sand is dried in foundaries in a___drier.
Rotary
Fluidisedbed
Vacuum
Spray
✅ The correct answer is option B.
7294. Weeping in a distillation column
Increases tray efficiency
Provides large interfacial surface for mass transfer
Results due to very high gas velocity
Results due to very low gas velocity
✅ The correct answer is option D.
7295. During sensible cooling process
Relative humidity decreases
Relative humidity increases
Wet bulb temperature decreases
Both B and C
✅ The correct answer is option D.
7296. At minimum reflux ratio for a given separation
Number of plates is zero
Number of plates is infinity
Minimum number of the theoretical plates is required
Separation is most efficient
✅ The correct answer is option B.
7297. The temperature to which a vapour gas mixture must be cooled (at varying humidity) to become saturated is called the __________ temperature.
Dew point
Wet bulb
Dry bulb
None of these
✅ The correct answer is option D.
7298. Which of the following can be calculated theoretically using steam table and Dalton’s law of partial pressure; if the relative humidity and dry bulb temperature of moist air is known?
Dew point
Humidity ratio
Wet bulb temperature
None of these
✅ The correct answer is option C.
7299. Mechanism of moisture removal in case of freeze drying of food stuff is by
Evaporation
Sublimation
Dehydration
Adsorption
✅ The correct answer is option B.
7300. Plate efficiency in a distillation column is reduced due to the __________ of liquid.
Entrainment
Foaming
Weeping & dumping
All of the above
✅ The correct answer is option D.