A. Highest temperatures is near the feed plate
B. Driving force for the liquid flow is its weight
C. Vapors are not always at their dew points
D. All A., B. and C.
Related Mcqs:
- In distillation columns, the number of bubble caps per tray primarily depends upon the_______________________?
A. Allowable liquid velocity
B. Allowable gas velocity
C. Allowable gas and liquid velocities
D. Feed composition - Inside the distillation column, the________________________?
A. Driving force for the vapour flow is the pressure drop
B. Liquids are not always at their bubble points
C. Pressure increases gradually from bottom to the top of the column
D. None of these - Polar organic compounds are normally used as separating agents for the azeotropic and extractive distillation. Which of the following is the most important factor to be considered for the choice of the separating agent for extractive distillation ?
A. Cost
B. Availability
C. Toxicity
D. Selectivity - _______________ columns are used for liquid dispersion in a continuous gas phase ?
A. Packed
B. Pulse
C. Bubble cap
D. Sieve plate - Which of these columns incurs the lowest pressure drop ?
A. Packed column (with stacked packing)
B. Packed column (with dumped packing)
C. Bubble plate column
D. Pulse column - Which of the following same diameter columns gives lowest pressure drop per unit height ?
A. Bubble-cap column
B. Sieve-plate column
C. Packed column (stacked)
D. Randomly packed column - Henry’s law states that the ________________________?
A. Partial pressure of a component over a solution is proportional to its mole fraction in the
liquid
B. Partial pressure of a component over a solution is proportional to the mole fraction in the
vapour
C. Vapour pressure is equal to the product of the mole fraction and total pressure
D. Partial pressure is equal to the product of the mole fraction and total pressure - At constant pressure, with increase of temperature, the dew point will ________________________?
A. Increase
B. Decrease
C. Remain unchanged
D. Increase/decrease; depends on the temperature - Detergent solution is dried to a powder in a ________________________?
A. Spray dryer
B. Spouted bed dryer
C. Tunnel dryer
D. Pan open to atmosphere - If f = moles of vapour present per mole of feed, then the slope of feed line is (McCabe- Thiele method) ________________________?
A. (1 – f)/f
B. – (f – 1)/f
C. -1/f
D. -f/(1 – f)
