A. 0
B. ∞
C. > 1
D. < 1
Related Mcqs:
- The slope of operating line in the rectifying section of a distillation column is unity, if the reflux ratio is___________________?
A. 0
B. ∞
C. 1
D. Minimum - What is the slope of the operating line in the rectifying section of a distillation column ?
A. 0
B. ∞
C. > 1
D. <1 - Theoretically calculated diameter of the stripping section of the continuous rectification column is ______________ that of the enriching section?
A. Less than
B. More than
C. Same as
D. Either more or less (depending upon relative volatility - Overall distillation column efficiency for most of the refinery columns can be given by (for μ = 0.07 – 1.4 cp and relative volatility < 4) (where ε = overall column efficiency, % μ = molal average viscosity of feed at average column temperature and pressure, cp Δp = pressure drop per tray, psi) ?
A. η = 17 – 61.1 log μ
B. η = 24.6 (Δp/μ)
C. η = 1.66 – 0.25 log μ
D. η = 0.25 log μ – 1.67 - What is the slope of the feed line, if the feed to a distillation column is a saturated liquid ?
A. 0
B. ∞
C. > 1
D. < 1 - The absorption factor is defined as (where, S1 = slope of the equilibrium curve, S2 = slope of the operating line) ?
A. S1/S2
B. S1.S2
C. S2/S1
D. 1/S1.S2 - Height equivalent to a theoretical plate (HETP) is the height of packing that will give the same separation as one theoretical plate in gas-liquid mass transfer operations like distillation, absorption/stripping and humidification/dehumidification. HETP which is experimentally determined, depends upon the_______________?
A. Flow rates of each fluid
B. Type and size of packing
C. Concentration of each fluid
D. All A, B. & C. - The slope of the feed line in distillation operation is given by (where, q = fraction of the feed stream that is liquid ?
A. -q
B. -q/(1-q)
C. -q/(q-1)
D. None of these - A high vapour velocity is required for high plate efficiency in a sieve plate column. The satisfactory value of operating vapor velocity for design purpose in sieve plate column is about _______________ percent of the flooding velocity?
A. 45
B. 60
C. 80
D. 95 - Weep holes provided in the plates of a distillation column ____________________?
A. Facilitate draining out liquid from a tray when the unit is not in operation
B. Are normally located near the overflow weir so that any delivery of liquid during operation
follows approximately the same path as the overflow fluid
C. Must be large enough (usually 1/4″ to 5/8″ dia) to prevent plugging but should not deliver
excessive amount of fluid during operation
D. All A., B. and C.
