March 2019 - Page 817 of 895 -

The dimensionless group in mass transfer that is equivalent to Prandtl number in heat transfer is_________________?

The dimensionless group in mass transfer that is equivalent to Prandtl number in heat transfer is_________________?

A. Nusselt number
B. Sherwood number
C. Schmidt number
D. Stanton number

The dimensionless group in mass transfer that is equivalent to Prandtl number in heat transfer is_________________? Read More »

Chemical Heat Transfer

Loss of heat from untagged steam pipe to the ambient air is by __________________?

Chemical Heat Transfer / admin

Loss of heat from untagged steam pipe to the ambient air is by __________________?

A. Conduction
B. Convection
C. Radiation
D. All A., B. & C.

Loss of heat from untagged steam pipe to the ambient air is by __________________? Read More »

Chemical Heat Transfer

In Biot number, the characteristic length used is the ratio of the _______________ of the solid?

Chemical Heat Transfer / admin

In Biot number, the characteristic length used is the ratio of the _______________ of the solid?

A. Volume to surface area
B. Perimeter to surface area
C. Surface area to volume
D. Surface area to perimeter

In Biot number, the characteristic length used is the ratio of the _______________ of the solid? Read More »

Chemical Heat Transfer

Boiling point elevation for a strong and concentrated solution is found by Duhring’s rule, which states that at the same pressure, the boiling point of a solution is a linear function of the _______________ of pure water?

Chemical Heat Transfer / admin

Boiling point elevation for a strong and concentrated solution is found by Duhring’s rule, which states that at the same pressure, the boiling point of a solution is a linear function of the _______________ of pure water?

A. Boiling point
B. Dynamic viscosity
C. Kinematic viscosity
D. Density

Chemical Heat Transfer

Stefan-Boltzmann law which describes the radiation heat transfer states that, it is proportional to (where, t = temperature in °C T = absolute temperature in ° K) ?

Chemical Heat Transfer / admin

Stefan-Boltzmann law which describes the radiation heat transfer states that, it is proportional to (where, t = temperature in °C T = absolute temperature in ° K) ?

A. t4
B. T4
C. 1/t4
D. 1/T4

Stefan-Boltzmann law which describes the radiation heat transfer states that, it is proportional to (where, t = temperature in °C T = absolute temperature in ° K) ? Read More »

Chemical Heat Transfer

The equation, (NSt × N2/3 Pr) = f/2, is the ____________ analogy ?

Chemical Heat Transfer / admin

The equation, (NSt × N2/3 Pr) = f/2, is the ____________ analogy ?

A. Colburn
B. Reynolds
C. Prandtl
D. None of these

The equation, (NSt × N2/3 Pr) = f/2, is the ____________ analogy ? Read More »

Chemical Heat Transfer

The range of electromagnetic spectrum important in heat transfer by radiation is ______________ microns?

Chemical Heat Transfer / admin

The range of electromagnetic spectrum important in heat transfer by radiation is ______________ microns?

A. 0.38-0.78
B. 0.5-50
C. 100-1000
D. 5-50

The range of electromagnetic spectrum important in heat transfer by radiation is ______________ microns? Read More »

Chemical Heat Transfer

Boiling point of a solution according to Duhring’s rule is a linear function of the _____________ of water?

Chemical Heat Transfer / admin

Boiling point of a solution according to Duhring’s rule is a linear function of the _____________ of water?

A. Boiling point (at the same pressure)
B. Viscosity
C. Density
D. Thermal conductivity

Boiling point of a solution according to Duhring’s rule is a linear function of the _____________ of water? Read More »

Chemical Heat Transfer

Prandtl number for most of dry gases is about________________?

Chemical Heat Transfer / admin

Prandtl number for most of dry gases is about________________?

A. 0.001
B. 0.72
C. 70
D. 150

Prandtl number for most of dry gases is about________________? Read More »

Chemical Heat Transfer

Extremely large or small volumes of fluids are generally best routed through the shell side of a shell and tube heat exchanger, because of the________________?

Chemical Heat Transfer / admin

Extremely large or small volumes of fluids are generally best routed through the shell side of a shell and tube heat exchanger, because of the________________?

A. Less corrosion problems
B. Flexibility possible in the baffle arrangement
C. Low pressure drop
D. High heat transfer co-efficient

Extremely large or small volumes of fluids are generally best routed through the shell side of a shell and tube heat exchanger, because of the________________? Read More »

Chemical Heat Transfer