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Chemical Engineering / Q&A

For a cold dilute feed to produce thick viscous liquor, backward feeding as compared to forward feeding results in_____________________?

Chemical Engineering / Q&A, MCQs / Q&A /
For a cold dilute feed to produce thick viscous liquor, backward feeding as compared to forward feeding results in_____________________?

A. Increased economy (Correct)
B. Decreased economy
C. Lower capacity
D. No effect on economy

 

For a cold dilute feed to produce thick viscous liquor, backward feeding as compared to forward feeding results in_____________________? Read More »

Chemical Engineering / Q&A, MCQs / Q&A

Log mean temperature difference in case of multi-pass shell and tube heat exchanger is always_________________?

Chemical Engineering / Q&A, MCQs / Q&A /
Log mean temperature difference in case of multi-pass shell and tube heat exchanger is always_________________?

A. Less than arithmetic mean value (Correct)
B. More than arithmetic mean value
C. More than geometric mean value
D. Both B. & C.

 

Log mean temperature difference in case of multi-pass shell and tube heat exchanger is always_________________? Read More »

Chemical Engineering / Q&A, MCQs / Q&A

Raoult’s law states that ‘the equilibrium vapor pressure that is exerted by a component in a solution is proportional to the mole fraction of that component’. This generalisation is based on the assumption that the________________?

Chemical Engineering / Q&A, MCQs / Q&A /
Raoult’s law states that ‘the equilibrium vapor pressure that is exerted by a component in a solution is proportional to the mole fraction of that component’. This generalisation is based on the assumption that the________________?

A. Sizes of the component molecules are approximately equal
B. Attractive forces between like and unlike molecules are approximately equal
C. Component molecules are non-polar and no chemical combination or molecular association
between unlike molecules takes place in the formation of the solution
D. All A., B. & C. (Correct)

 

Raoult’s law states that ‘the equilibrium vapor pressure that is exerted by a component in a solution is proportional to the mole fraction of that component’. This generalisation is based on the assumption that the________________? Read More »

Chemical Engineering / Q&A, MCQs / Q&A

Normally, the ratio of the total riser area to the tower cross sectional area (for bubble cap towers of diameter more than 3 ft) is around_______________?

Chemical Engineering / Q&A, MCQs / Q&A /
Normally, the ratio of the total riser area to the tower cross sectional area (for bubble cap towers of diameter more than 3 ft) is around_______________?

A. 0.4-0.6
B. 0.35-0.75
C. 0.1-0.2 (Correct)
D. 0.55-0.85

 

Normally, the ratio of the total riser area to the tower cross sectional area (for bubble cap towers of diameter more than 3 ft) is around_______________? Read More »

Chemical Engineering / Q&A, MCQs / Q&A