In case of a vertical tube evaporator, with increase in the liquor level, the___________________?

Byadmin March 3, 2019August 24, 2021

In case of a vertical tube evaporator, with increase in the liquor level, the___________________?

A. Capacity of the evaporator is decreased
B. Capacity of the evaporator is increased
C. True temperature drop increases
D. Both B. and C.

Chemical Heat Transfer

Which characteristic of a fluid is not important in deciding its route in a shell and tube heat exchanger ?

Which characteristic of a fluid is not important in deciding its route in a shell and tube heat exchanger ?

A. Corrosiveness
B. Fouling characteristic
C. Viscosity
D. None of these

Read More Which characteristic of a fluid is not important in deciding its route in a shell and tube heat exchanger ?
Chemical Heat Transfer

The statement that “maximum wavelength of radiation is inversely proportional to the temperature” is ______________ law?

The statement that “maximum wavelength of radiation is inversely proportional to the temperature” is ______________ law?

A. Stefan-Boltzmann’s
B. Planck’s
C. Wien’s displacement
D. None of these

Read More The statement that “maximum wavelength of radiation is inversely proportional to the temperature” is ______________ law?
Chemical Heat Transfer

Heat transfer rate described by Fourier’s law will decrease, if the _____________ increases?

Heat transfer rate described by Fourier’s law will decrease, if the _____________ increases?

A. Thermal conductivity
B. Thickness
C. Temperature difference
D. Heat transfer area

Read More Heat transfer rate described by Fourier’s law will decrease, if the _____________ increases?
Chemical Heat Transfer

Which of the following situations can be approximated to a steady state heat transfer system ?

Which of the following situations can be approximated to a steady state heat transfer system ?

A. A red hot steel slab (having outside surface temperature as 1300°C) exposed to the
atmospheric air at 35°C
B. 10 kg of dry saturated steam at 8 kgf/cm2 flowing through a short length of stainless steel pipe
exposed to atmospheric air at 35°C
C. Boiling brine kept in open vessel when the bottom surface temperature of the vessel is
maintained constant at 180°C
D. A sub-cooled refrigerant liquid at 8°C flowing at the rate of 6 Kg/minute through a copper
pipe exposed to atmospheric air at 35°C

Read More Which of the following situations can be approximated to a steady state heat transfer system ?
Chemical Heat Transfer

Prandtl and Reynolds analogy are same, when Prandtl number is____________________?

Prandtl and Reynolds analogy are same, when Prandtl number is____________________?

A. 0.5
B. 1
C. > 2
D. 1.5

Read More Prandtl and Reynolds analogy are same, when Prandtl number is____________________?
Chemical Heat Transfer

The Nusselt number for fully developed (both thermally and hydrodynamically) laminar flow through a circular pipe, where the wall heat flux is constant, is__________________?

The Nusselt number for fully developed (both thermally and hydrodynamically) laminar flow through a circular pipe, where the wall heat flux is constant, is__________________?

A. 2.36
B. 4.36
C. 120.36
D. Dependent on NRe only

Read More The Nusselt number for fully developed (both thermally and hydrodynamically) laminar flow through a circular pipe, where the wall heat flux is constant, is__________________?

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