Question: Dimension of mass diffusivity is the same as that of
[A].kinematic viscosity
dynamic viscosity
surface tension
pressure
[A].
[B].
[C].
[D].
Answer: Option A
Explanation:
No answer description available for this question.
Mass Transfer
In McCabe-Thiele method of theoretical plate calculation for a distillation column, the operating lines of stripping and rectifying sections coincide with the diagonal at __________ reflux.
Question: In McCabe-Thiele method of theoretical plate calculation for a distillation column, the operating lines of stripping and rectifying sections coincide with the diagonal at __________ reflux.
[A].total
minimum
operating
maximum permissible
[A].
[B].
[C].
[D].
Answer: Option A
Explanation:
No answer description available for this question.
During the constant rate period of drying of a solid,
Question: During the constant rate period of drying of a solid,
[A].increased air humidity decreases the rate of drying.
increasing the air temperature decreases the drying rate.
surface evaporation of unbound moisture occurs.
none of these.
[A].
[B].
[C].
[D].
Answer: Option C
Explanation:
No answer description available for this question.
Dry bulb temperature of the gas is __________ the wet bulb temperature.
Question: Dry bulb temperature of the gas is __________ the wet bulb temperature.
[A].less than
more than
equal to
none of these
[A].
[B].
[C].
[D].
Answer: Option B
Explanation:
No answer description available for this question.
Gaseous diffusivity at atmospheric pressure is of the order of __________ cm2/second.
Question: Gaseous diffusivity at atmospheric pressure is of the order of __________ cm2/second.
[A].1
1 to 5
5 to 10
> 10
[A].
[B].
[C].
[D].
Answer: Option A
Explanation:
No answer description available for this question.
At __________ reflux, theoretical number of plates in a distillation coloumn is calculated using Fenske-Underwood equation.
Question: At __________ reflux, theoretical number of plates in a distillation coloumn is calculated using Fenske-Underwood equation.
[A].operating
total
minimum
maximum permissible
[A].
[B].
[C].
[D].
Answer: Option B
Explanation:
No answer description available for this question.
Large scale drying of sugar is done in a __________ dryer.
Question: Large scale drying of sugar is done in a __________ dryer.
[A].spouted bed
tray
rotary
truck
[A].
[B].
[C].
[D].
Answer: Option C
Explanation:
No answer description available for this question.
__________ is the separation technique used for desalination of sea water.
Question: __________ is the separation technique used for desalination of sea water.
[A].Thermal diffusion
Reverse osmosis
Adsorption
absorption
[A].
[B].
[C].
[D].
Answer: Option B
Explanation:
No answer description available for this question.
Liquid diffusivity is of the order of __________ cm2 /second.
Question: Liquid diffusivity is of the order of __________ cm2 /second.
[A].0.01
0.1
10-5 to 10-6
> 1
[A].
[B].
[C].
[D].
Answer: Option C
Explanation:
No answer description available for this question.
Danckwerts developed the __________ theory.
Question: Danckwerts developed the __________ theory.
[A].penetration
surface renewal
film
none of these
[A].
[B].
[C].
[D].
Answer: Option B
Explanation:
No answer description available for this question.