Chemical Heat Transfer

Chemical Heat Transfer

For a liquid in laminar flow through a very long tube, when the exit fluid temperature approaches the wall temperature, the equation to be used is______________?

For a liquid in laminar flow through a very long tube, when the exit fluid temperature approaches the wall temperature, the equation to be used is______________?

A. Nu = 0.023 Re0.8. Pr0.4
B. Nu = (π/2) Gz
C. Nu = (2/π) Gz
D. Nu = 2Gz0.5

Read More For a liquid in laminar flow through a very long tube, when the exit fluid temperature approaches the wall temperature, the equation to be used is______________?
Chemical Heat Transfer

The non-dimensional temperature gradient in a liquid at the wall of a pipe is the ____________________?

The non-dimensional temperature gradient in a liquid at the wall of a pipe is the ____________________?

A. Heat flux
B. Nusselt number
C. Prandtl number
D. Schmidt number

Read More The non-dimensional temperature gradient in a liquid at the wall of a pipe is the ____________________?
Chemical Heat Transfer

The film co-efficient between condensing vapour and metal wall increases with _____________________?

The film co-efficient between condensing vapour and metal wall increases with _____________________?

A. Increasing temperature of the vapour
B. Decreasing temperature of the vapour
C. Increasing viscosity of the film of condensate
D. Increasing temperature drop

Read More The film co-efficient between condensing vapour and metal wall increases with _____________________?
Chemical Heat Transfer

With increase in temperature, the thermal conductivity of most liquids_________________?

With increase in temperature, the thermal conductivity of most liquids_________________?

A. Increases
B. Decreases
C. Remain same
D. First increases upto a certain temperature and then becomes constant

Read More With increase in temperature, the thermal conductivity of most liquids_________________?
Chemical Heat Transfer

In a shell and tube heat exchanger, putting a longitudinal baffle across the shell, forces the shell side fluid to pass _____________ through the heat exchanger ?

In a shell and tube heat exchanger, putting a longitudinal baffle across the shell, forces the shell side fluid to pass _____________ through the heat exchanger ?

A. Once
B. Twice
C. Thrice
D. Four times

Read More In a shell and tube heat exchanger, putting a longitudinal baffle across the shell, forces the shell side fluid to pass _____________ through the heat exchanger ?
Chemical Heat Transfer

The driving potential for the crystal growth during crystallisation is the _______________ of the solution?

The driving potential for the crystal growth during crystallisation is the _______________ of the solution?

A. Concentration
B. Viscosity
C. Super-saturation
D. Density

Read More The driving potential for the crystal growth during crystallisation is the _______________ of the solution?
Chemical Heat Transfer

Heat flux, as defined in heat flow is analogous to _______________ in electricity flow?

Heat flux, as defined in heat flow is analogous to _______________ in electricity flow?

A. Current
B. Voltage
C. Resistance
D. None of these

Read More Heat flux, as defined in heat flow is analogous to _______________ in electricity flow?
Chemical Heat Transfer

Conductance is given by (where, x = thickness, A = heat flow area, K = thermal conductivity.)?

Conductance is given by (where, x = thickness, A = heat flow area, K = thermal conductivity.)?

A. x/KA
B. KA/x
C. K/Ax
D. A/Kx

Read More Conductance is given by (where, x = thickness, A = heat flow area, K = thermal conductivity.)?
Chemical Heat Transfer

LMTD can’t be used as such without a correction factor for the_________________?

LMTD can’t be used as such without a correction factor for the_________________?

A. Multipass heat exchanger
B. Baffled heat exchanger
C. Condensation of mixed vapour in a condenser
D. All A. B. and C.

Read More LMTD can’t be used as such without a correction factor for the_________________?
Chemical Heat Transfer

Heat sensitive materials can be concentrated in an evaporator employing_______________?

Heat sensitive materials can be concentrated in an evaporator employing_______________?

A. Vacuum
B. High pressure
C. High residence time
D. None of these

Read More Heat sensitive materials can be concentrated in an evaporator employing_______________?