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Mass Transfer

Mass Transfer
Calcium ammonium nitrate (a fertiliser) is dried in a __________ dryer.

Tray
Rotary
Tunnel
Vacuum

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Mass Transfer
In a packed absorption tower, if the equilibrium and operating lines are both straight lines, then the ratio, HETP/HTUOG __________ the absorption factor.

Neither A nor B
Increases with increase in
Both A and B
Is one at unity value of

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Mass Transfer
If the overall efficiency and Murphree plate efficiency are equal, then both the equilibrium and operating lines are

Neither A nor B
Parallel
Straight
Both A & B

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Mass Transfer
Penetration theory states that the mass transfer co-coefficient is equal to (where, De is diffusivity and 't' is time)

(De/t)1/2
(De.t)1/2
(4De/t)
(4De/πt)1/2

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Mass Transfer
__________ extractor is used for the concentration of radioactive nuclear waste.

Mixer-settler
None of the listed here
Seive plate
Pulsed column

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Mass Transfer
Weeping in a distillation column

Provides large interfacial surface for mass transfer
Results due to very high gas velocity
Increases tray efficiency
Results due to very low gas velocity

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