A. D/a
B. D/2a
C. Proportional to āD
D. Dependent on the Reynolds number
0
Cox chart, which is useful in the design of distillation column particularly for petroleum hydrocarbons, is a plot of (where, P = vapor pressure, T = temperature) ?
0
The commonly used solvent in supercritical extraction is_____________________?
A. log P vs. T
B. log P vs. log T
C. T vs. P
D. P vs. log T
0
For the same system, if the same liquid used in an absorber is decreased, the tower height will__________________?
A. Methyl ethyl ketone
B. Water
C. Carbon tetrachloride
D. Carbon dioxide
0
The equation, NA = (DAB . Pt /RTZ . PBM) (PA1 – PA2) is for_______________________?
A. Increase
B. Decrease
C. Remain unaffected
D. Decrease or increase; depends on the type of liquid
0
Perforated plate towers are unique for solvent extraction because, they provide_____________________?
A. Fick’s second law of diffusion
B. Steady state diffusion for stagnant case
C. Liquid M.T.C. by Higbie penetration theory
D. None of these
0
For the gas absorption, the height of a transfer unit, based on the gas phase is given by (G: superficial molar gas velocity, L: superficial molar liquid velocity, FG: mass transfer co-efficient, moles/m2, a: interfacial area per unit volume of tower) ?
A. Higher contact area
B. Better contact of the phase
C. Repeated coalescence & redispersion of the drop phase
D. None of these
0
Pore size of the molecular sieve 5A is ____________________ mm ?
A. G/(FG . a)
B. FG/(G . a)
C. (G . a)/FG
D. L/(FG . G)
0
To remove all the moisture from a wet solid it requires exposure to _____________ air?
A. 5
B. 0.5
C. 0.05
D. 50
0
The cooling effect in a cooling tower can be speeded up by _______________________?
A. Perfectly dry
B. Highly humid
C. High temperature
D. None of these
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