February 2019 | Page 132 of 448 | AnsweringExams.Com

Lewis number, which is important in problems involving simultaneous heat and mass transfer, is the ratio of__________________?

August 22, 2021February 17, 2019 by admin

Lewis number, which is important in problems involving simultaneous heat and mass transfer, is the ratio of__________________?

A. Mass diffusivity to momentum diffusivity
B. Thermal diffusivity to mass diffusivity
C. Momentum diffusivity to thermal diffusivity
D. None of these

Corresponding to Nusselt number in heat transfer, the dimensionless group in mass transfer is the ________________ number?

August 22, 2021February 17, 2019 by admin

Corresponding to Nusselt number in heat transfer, the dimensionless group in mass transfer is the ________________ number?

A. Sherwood
B. Schmidt
C. Peclet
D. Stanton

Cox chart is useful in the design of___________________?

August 22, 2021February 17, 2019 by admin

Cox chart is useful in the design of___________________?

A. Distillation column
B. Evaporator
C. Dryer
D. Crystalliser

The binary diffusivity in gases and liquids vary respectively as_________________?

August 22, 2021February 17, 2019 by admin

The binary diffusivity in gases and liquids vary respectively as_________________?

A. T3/2 and T
B. T and T3/2
C. √T and T3/2
D. T3/2 and √T

Decoction refers to the use of solvent________________?

August 22, 2021February 17, 2019 by admin

Decoction refers to the use of solvent________________?

A. At ambient temperature
B. At its boiling point
C. In its vapor form
D. None of these

Ordinary diffusion process is also called ______________ diffusion?

August 22, 2021February 17, 2019 by admin

Ordinary diffusion process is also called ______________ diffusion?

A. Pressure
B. Thermal
C. Concentration
D. Forced

Out of the following gas-liquid contacting devices, for a given set of operating conditions, gas pressure drop is the least in ______________ tower?

August 22, 2021February 17, 2019 by admin

Out of the following gas-liquid contacting devices, for a given set of operating conditions, gas pressure drop is the least in ______________ tower?

A. Wetted wall
B. Bubble cap
C. Perforated tray
D. Packed

The solvent used in liquid-liquid extraction should have _______________ less than one?

August 22, 2021February 17, 2019 by admin

The solvent used in liquid-liquid extraction should have _______________ less than one?

A. Selectivity
B. Distribution co-efficient
C. Both A. and B.
D. Neither A. nor B.

Which of the following equipments is not used for liquid dispersion ?

August 22, 2021February 17, 2019 by admin

Which of the following equipments is not used for liquid dispersion ?

A. Wetted wall towers
B. Packed towers
C. Venturi scrubbers
D. Agitated vessels

Diffusion co-efficient generally depends upon the temperature, pressure & the nature of the components of the system. Its dimension is not the same as that of the_________________?

August 22, 2021February 17, 2019 by admin

Diffusion co-efficient generally depends upon the temperature, pressure & the nature of the components of the system. Its dimension is not the same as that of the_________________?

A. Mass transfer co-efficient
B. Thermal diffusivity
C. Kinematic viscosity
D. Volumetric diffusivity