A. Positive
B. Negative
C. No
D. None of these
Related Mcqs:
- A binary liquid Azeotropic mixture has boiling point higher than either of the components, when it shows ______________ deviation from Raoult’s Law?
A. Positive
B. Negative
C. No
D. None of these - Liquid redistribution should be done in a packed tower packed with raschig rings every 6 metres or ______________ times the column diameter, whichever is lower?
A. 2.5-3.0
B. 5-7.5
C. 10-12.5
D. 15-20 - The distance between the top of the slots and the liquid surface when the static liquid is just ready to flow over the overflow weir is called____________________?
A. Downcomer liquid seal
B. Static submergence
C. Skirt clearance
D. None of these - Smoker’s equation for the calculation of number of equilibrium stages in a continuous binary distillation column is used, when the_________________?
A. Relative volatility is close to one (e.g., separation of close boiling isomers)
B. Feed is not at its bubble point
C. Number of equilibrium stages in only stripping section is to be calculated
D. Number of equilibrium stages required is likely to be very small - With increase in the reflux ratio for a fixed production from a continuous binary distillation column, the ______________________ decreases?
A. Fixed charges initially
B. Running cost of cooling water for condenser
C. Vapour & liquid load both
D. Running cost of steam for reboiler - Which of the following is not a graphical method (but is an analytical method) for the calculation of theoretical number of stages in case of continuous binary distillation ?
A. Sorel-Lewis method
B. McCabe-Thiele’s method
C. Ponchon-Savarit method
D. None of these - Vapor velocity in a distillation column for non-foaming mixture is in the range of ______________ times the flooding velocity?
A. 0.1 to 0.3
B. 0.6 to 0.7
C. 0.85 to 0.95
D. 1.5 to 2 - Smaller sized packings are generally dumped to the packed columns, and the large ones of size greater than ______________ mm are stacked individually, which provides better control over bed porosity and offers lower gas pressure drop?
A. 25
B. 50
C. 75
D. 150 - ___________ tower is the most suitable gas-liquid contacting device involving highly corrosive fluids?
A. Sieve plate
B. Packed
C. Bubble cap plate
D. None of these - Liquid gradient over a tray can be minimised by________________?
A. Providing a higher skirt clearance or a higher weir
B. Decreasing the number of rows of caps through which the liquid flows or by decreasing the
velocity of liquid flow past the caps or by reducing the distance along the tray through which
the liquid must flow
C. Using split flow, radial flow or cascade flow for column diameter large than 4 ft
D. All A., B. and C.
