Separation Processes Questions and Answers – Rate Based Method for Packed Columns

This set of Separation Processes Multiple Choice Questions & Answers (MCQs) focuses on “Rate Based Method for Packed Columns”.

1. Packed columns are better analyzed by:
a) Mass transfer coefficients
b) Equilibrium stage methods
c) Graphical methods
d) Algebraical methods
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2. What is the formula for HETP or HETS?
a) HETP = l _T *N _T
b) HETP = l _T-N _T
c) HETP = l _T /N_T
d) HETP = l_T+N_T
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3. At the interface of liquid and vapor, which interface exists?
a) Chemical
b) Physical
c) Thermal
d) No equilibrium exists
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4. Which of the following is the correct illustration of rate of mass transfer?
a) r= k_y a(y-y 1 ) =k_x a(x-x 1 )
b) r= k_y a(y 1 -y) =k_x a(x 1 -x)
c) r= k_y a(y-y 1 ) =k_x a(x 1 -x)
d) r= a(y-y 1 ) =a(x 1 -x)
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5. Which of the following is the correct representation of overall mass transfer coefficient?
a) 1/K_y a = 1/k_y a +K/K_x a
b) 1/K_y a = 1/k_y a +K/K_y a
c) 1/K_y a = 1/k_y a +1/KK_x a
d) K_y a = 1/k_y a +K/K_x a
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6. What is the overall height of gas transfer unit if the volume is 1000m 3 and the overall gas phase coefficient is 2.6 and the inside cross sectional area is 20m 2 .
a) 12m
b) 13.6m
c) 18.9m
d) 19.2m
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7. What is the overall height of gas transfer unit if the volume is 780m 3 and the overall gas phase coefficient is 4.2 and the inside cross sectional area is 45m 2 .
a) 4.1m
b) 7.2m
c) 10.4m
d) 19.2m
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8. What is the overall height of gas transfer unit if the volume is 489m 3 and the overall gas phase coefficient is 1.2 and the inside cross sectional area is 22m 2 .
a) 12m
b) 13.6m
c) 18.5m
d) 19.2m
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9. What is the packed height length is HETP is 3ft and the number of equilibrium stages is
a) 0.75
b) 1.33
c) 12
d) 16
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10. What is the packed height length is HETP is 3.8ft and the number of equilibrium stages is
a) 0.76
b) 1.3157
c) 12
d) 19
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11. What is the packed height length is HETP is 6ft and the number of equilibrium stages is
a) 0.76
b) 1.3157
c) 30
d) 19
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12. What is the packed height length is HETP is 4.2ft and the number of equilibrium stages is
a) 0.76
b) 8.4
c) 12
d) 19
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Sanfoundry Global Education & Learning Series – Separation Processes.

To practice all areas of Separation Processes, here is complete set of 1000+ Multiple Choice Questions and Answers.

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