Chemical Engineering - Mass Transfer

11.
At 750°K and 1 atm, the approximate value of Schmidt number for air is
0.01
0.1
1
10
Answer: Option
Explanation:
No answer description is available. Let's discuss.

12.
Calculation of mass transfer co-efficient is mostly/normally done using __________ theory.
surface renewal
film
penetration
none of these.
Answer: Option
Explanation:
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13.
The velocity, concentration and temperature boundary, for the boundary layer development on a flat plate during connective mass transfer will be same, if
NSc = 1
NSc = NPr = NLe
NPr = NLe
NSc = NLe
Answer: Option
Explanation:
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14.
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, mols/m2 , a: in-terfacial area per unit volume of tower)
Answer: Option
Explanation:
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15.
Which of the following is used for the concentration of rubber latex ?
Agitated film evaporator
Long tube vertical evaporator
Short tube evaporator
Calendria
Answer: Option
Explanation:
No answer description is available. Let's discuss.