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Mass Transfer

Mass Transfer
If moisture content of solid on dry basis is X, then the same on wet basis is

(X + 1)/X
X/(X - 1)
(X - 1)/X
X/(X + 1)

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Mass Transfer
Paper industry employs __________ driers.

Rotary
Fluidised bed
Spray
Cylinder

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Mass Transfer
Acetone is to be removed from air in an isothermal dilute absorber using pure water as solvent. The incoming air contains 5 mole% of acetone (yin = 0.05). The design equation to be used for obtaining the number of trays (N) of the absorber is, N+2 = 6 log (yin/yout).For 98% recovery of acetone, the number of trays required is/are

1
9
10
8

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Mass Transfer
Dimension of mass diffusivity is the same as that of

Pressure
Kinematic viscosity
Surface tension
Dynamic viscosity

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Mass Transfer
Percentage saturation is __________ the relative saturation.

None of these
Not related to
Always greater than
Always smaller than

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Mass Transfer
Which of the following equipments is not used for gas dispersion?

Agitated vessels
Perforated sieve tray towers
Spray towers
Bubble cap tray towers

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