B. Cross-partition

C. Single spiral

D. Lessing

A. Sensible heat

C. Humid heat

D. Latent heat

A. Dissolution of tannin out of tree barks by water

B. Separation of sugar from sugar beet by hot water

C. Recovery of vegetable oils from seeds

A. Unsaturated surface

B. Constant rate

D. Neither A. nor B.

A. Gas

C. Both A. & B.

D. Neither A. nor B.

A. An irreversible phenomenon

B. A reversible phenomenon

C. Accompanied by evolution of heat

A. Dew point

B. Wet bulb

D. Neither A nor B

A. (1 X)/X

B. (1 + X)/X

D. X/(1 X)

A. Agitated vessels

B. Bubble cap tray towers

C. Perforated sieve tray towers

A. tillation column</strong>

B. Total condenser or reboiler is considered equivalent to one theoretical plate in McCabe-Thiele

D. hod of theoretical plate calculation for distillation column

E. Even a forced draft cooling tower cannot cool water below the wet bulb temperature

F. Different solids have different equilibrium moisture curves

A. ction

B. tem separation

C. Higher hold up of the solid in the rotary dryer results in better exposure of the solids to the gas

E. Total reflux in case of distillation operation requires infinite number of plates for a binary

F. ponents is linear in the case of steady state equimolal counter-diffusion</strong>

A. Pr = Sc; percentage change in heat and mass transfer flux will be the same for a given change

B. the degree of turbulence

C. Pr = Sc = 1; total mass, momentum and thermal diffusivity will be the same

E. Pr = Sc; there wont be any change in heat and mass transfer flux with changes in degree of

F. bulence

A. None of these

B. Less than the sum of the vapour pressure of the components

D. Less than that computed for ideality

A. ponents</strong>

B. The solubility of a particular gas in ideal solution in any solvent is always the same

C. The operating line always lies above the equilibrium solubility curve in case of a single

D. ponent stripper

E. The operating line always lies below the equilibrium solubility curve in case of a single

A. None of these

C. Pressure increases gradually from bottom to the top of the column

D. Liquids are not always at their bubble points

A. Bound

B. Critical

D. Equilibrium

A. Vapor pressure

C. Freezing point

D. Viscosity

B. Remains same

C. Increases

D. Either A. or B., depends on the system

B. Absorption

C. Rectification

D. Adsorption

B. Rotary

C. Fluidised bed

D. None of these

A. Operating line lies above the equilibrium line

B. Operating line lies below the equilibrium line

D. Pressure drop in the column is very high

A. A reversible phenomenon

B. Same as Van der Waals adsorption

C. Characterised by adsorption of heat

A. In the McCabe-Thiele diagram for binary distillation, vertical feed line represents saturated

B. In small columns, local efficiency is larger than Murphree efficiency; in large columns local

C. The concentration and hydrodynamic boundary layers over a flat plate are of equal thickness,

E. m the leading edge is 1.5 10-2m/s. Then the average mass transfer co-efficient for the

F. Schmidt number is equal to unity

A. The sum of free moisture and equilibrium moisture in a solid is called the critical moisture

C. Free moisture is removed during falling rate drying period

D. Bound moisture is removed during constant rate drying period

A. Unity

C. Data insufficient

D. Zero

A. For a non-reacting binary mixture of ideal gases, the partial pressure distribution of both

B. The relative volatility of a binary mixture at the Azeotropic composition is 1

D. ponents is nonlinear in the case of steady state unimolal unidirectional diffusion

E. The mole fraction of solute is directly proportional to the molality of a dilute solution

A. All A., B. and C.

B. Should be of high volatility

C. Should form azeotropes with the original components

B. Bubble plate column

C. Pulse column

D. Packed column (with dumped packing)

A. Ternary

B. Binary

C. None of these

A. 0

B. 0.2

C. 1

A. Tunnel

B. Cylinder

D. Festoon

A. 10-3 sec/cm

B. 10-4 cm2/sec2

D. 10-9 cm/sec

A. None of these

B. Dew point

C. Dry bulb temperature

A. ked tower

C. uid hold up is more in the case of plate column

D. Plate column can handle greater liquid loads without flooding than packed column, but the

E. For identical gas flow rates, less pressure drop occurs through a plate tower than through a

F. For the same duty, plate columns weigh less than packed columns

A. Flights (located in the inside shell of rotary dryer) lift the material being dried and shower it

C. n through the current of hot air/gases. It extends from the wall to a distance which is about

D. 2% of the inside diameter of shell

E. instant. The best performance for rotary drier is obtained, when the hold up is in the range

F. Hold up of a rotary drier is defined as the fraction of the dryer volume occupied by the solid at

A. Reboiler load

B. Condenser load

C. All A., B. and C.

A. Alumina

C. Hot cupric oxide

D. Cold Ca(OH)2

A. Re Pe

B. Sh Pe

D. Re/Pe

A. Temperature and pressure

B. Concentration

C. Nature of the constituents

A. Low reflux ratio

B. Less number of trays

C. Small cross-section column

A. A horizontal line on the humidity chart indicates the temperature changes at constant molal

B. idity

C. When water is cooled from 80 to 70C by exposure to the air with a wet bulb temperature of

D. C, then both the approach & the range would be 10C

E. For unsaturated air-water vapor mixture at atmospheric conditions, the wet bulb temperature

F. p; adiabatic cooling lines are the same

A. Pressure

C. Both A. & B.

D. Neither A. nor B.

A. Sherwood

C. Peclet

D. Stanton

A. Driven by a non-linear driving force

B. Liquid phase resistance-controlled

C. Impossible

A. Induced

B. None of these

D. Forced

A. Specific humidity

B. Partial pressure of vapour

D. Neither A. nor B.

A. Decreased efficiency

B. Better gas liquid contact

C. Increased efficiency

A. Maximum number of ideal plates

C. Height of the distillation column

D. Optimum reflux ratio

B. Evaporation

C. Entrainment

D. Blowdown

A. Elutriation process refers to when the soluble material is largely concentrated on the surface of

B. ther

C. Cellulose acetate membranes are used in dialysis process

D. insoluble solid and is simply washed off by the solvent

E. Cascade means a group of stages interconnected so that various streams flow from one to