Mass Transfer Archives - Page 59 of 93 -

In case of non-ideal gases and liquids, the molal diffusivity ________________?

In case of non-ideal gases and liquids, the molal diffusivity ________________?

A. Varies inversely as the pressure
B. Varies directly as the pressure
C. Is independent of pressure
D. Is equal to the volumetric diffusivity

In case of non-ideal gases and liquids, the molal diffusivity ________________? Read More »

Mass Transfer

Unit of molal diffusivity is____________________?

Mass Transfer / admin

Unit of molal diffusivity is____________________?

A. cm2/sec gm . mole
B. gm moles/cm2 . sec
C. gm moles/cm. sec
D. gm moles/cm2. sec

Unit of molal diffusivity is____________________? Read More »

Mass Transfer

Milk is dried usually in a __________________ dryer?

Mass Transfer / admin

Milk is dried usually in a __________________ dryer?

A. Freeze
B. Spray
C. Tray
D. Rotary

Milk is dried usually in a __________________ dryer? Read More »

Mass Transfer

Penetration model (theory) for mass transfer was enunciated by _____________________?

Mass Transfer / admin

Penetration model (theory) for mass transfer was enunciated by _____________________?

A. Danckwerts
B. Toor and Marcello
C. Higbie
D. Kissinevskii

Penetration model (theory) for mass transfer was enunciated by _____________________? Read More »

Mass Transfer

For an absorber, both equilibrium and operating line will be straight for _______________________?

Mass Transfer / admin

For an absorber, both equilibrium and operating line will be straight for _______________________?

A. Concentrated solution and non-isothermal operation
B. Dilute solution and non-isothermal operation
C. Dilute solution and isothermal operation
D. Concentrated solution and isothermal operation

For an absorber, both equilibrium and operating line will be straight for _______________________? Read More »

Mass Transfer

An air-water vapour mixture has a dry bulb temperature of 60°C and a dew point temperature of 40°C. The total pressure is 101.3 kPa and the vapour pressure of water at 40°C and 60°C are 7.30 kPa and 19.91 kPa respectively. The humidity of air sample expressed as kg of water vapour/kg of dry air is__________________?

Mass Transfer / admin

An air-water vapour mixture has a dry bulb temperature of 60°C and a dew point temperature of 40°C. The total pressure is 101.3 kPa and the vapour pressure of water at 40°C and 60°C are 7.30 kPa and 19.91 kPa respectively. The humidity of air sample expressed as kg of water vapour/kg of dry air is__________________?

A. 0.048
B. 0.079
C. 0.122
D. 0.152

Mass Transfer

Advantage of continuous drying over batch drying is that the_____________________?

Mass Transfer / admin

Advantage of continuous drying over batch drying is that the_____________________?

A. Drying cost per unit weight of dried product is less
B. Product with more uniform moisture content is produced
C. Equipment size required is smaller
D. All A , B. & C.

Advantage of continuous drying over batch drying is that the_____________________? Read More »

Mass Transfer

The relative saturation of an unsaturated mixture of gas and vapor is independent of the___________________?

Mass Transfer / admin

The relative saturation of an unsaturated mixture of gas and vapor is independent of the___________________?

A. Nature of the vapor
B. Temperature of the mixture
C. Composition of the mixture
D. None of these

The relative saturation of an unsaturated mixture of gas and vapor is independent of the___________________? Read More »

Mass Transfer

In case of liquids, the binary diffusivity is proportional to (where, T = temperature) _____________________?

Mass Transfer / admin

In case of liquids, the binary diffusivity is proportional to (where, T = temperature) _____________________?

A. T
B. √T
C. T2
D. 1/T

In case of liquids, the binary diffusivity is proportional to (where, T = temperature) _____________________? Read More »

Mass Transfer

Hypersorption refers to a ________________ process?

Mass Transfer / admin

Hypersorption refers to a ________________ process?

A. Fixed bed absorption
B. Moving bed absorption
C. Fixed bed adsorption
D. Moving bed adsorption

Hypersorption refers to a ________________ process? Read More »

Mass Transfer