Chemical Heat Transfer

Viscosity of gases ______________ with increase in temperature?

Byadmin March 2, 2019August 24, 2021

Viscosity of gases ______________ with increase in temperature?

A. Increase very rapidly
B. Increase slowly
C. Decrease slowly
D. Remain unaffected

Chemical Heat Transfer

In forced convection, the Nusselt number is a function of ____________________?

In forced convection, the Nusselt number is a function of ____________________?

A. Re and Pr
B. Re and Gr
C. Pr and Gr
D. Re and Sc

Read More In forced convection, the Nusselt number is a function of ____________________?
Chemical Heat Transfer

Multiple effect evaporators are commonly used in the manufacture of P. Paper Q. Superphosphate R. Sugar S. Fats ?

Multiple effect evaporators are commonly used in the manufacture of P. Paper Q. Superphosphate R. Sugar S. Fats ?

A. P and Q
B. P and R
C. P and S
D. R and S

Read More Multiple effect evaporators are commonly used in the manufacture of P. Paper Q. Superphosphate R. Sugar S. Fats ?
Chemical Heat Transfer

In a shell and tube heat exchanger, the shell side fluid velocity can‟t be changed by changing the_________________?

In a shell and tube heat exchanger, the shell side fluid velocity can‟t be changed by changing the_________________?

A. Tube layout
B. Tube diameter
C. Tube pitch
D. Number of baffles

Read More In a shell and tube heat exchanger, the shell side fluid velocity can‟t be changed by changing the_________________?
Chemical Heat Transfer

Heat transfer rate per unit area is called_________________?

Heat transfer rate per unit area is called_________________?

A. Thermal conductivity
B. Heat flux
C. Heat transfer co-efficient
D. Thermal diffusivity

Read More Heat transfer rate per unit area is called_________________?
Chemical Heat Transfer

Walls of a cubical oven are of thickness l, and they are made of material of thermal conductivity k. The temperature inside the oven is 100°C and the inside heat transfer coefficient is „3k/l’. If the wall temperature on the outside is held at 25°C, what is the inside wall temperature in degree centigrade ?

Walls of a cubical oven are of thickness l, and they are made of material of thermal conductivity k. The temperature inside the oven is 100°C and the inside heat transfer coefficient is „3k/l’. If the wall temperature on the outside is held at 25°C, what is the inside wall temperature in degree centigrade ?

A. 35.5
B. 43.75
C. 81.25
D. 48.25

Read More Walls of a cubical oven are of thickness l, and they are made of material of thermal conductivity k. The temperature inside the oven is 100°C and the inside heat transfer coefficient is „3k/l’. If the wall temperature on the outside is held at 25°C, what is the inside wall temperature in degree centigrade ?
Chemical Heat Transfer

Vibrations in the tubes of a shell and tube heat exchanger is induced due to the _________________?

Vibrations in the tubes of a shell and tube heat exchanger is induced due to the _________________?

A. Flow of fluid on the tube and shell sides
B. Oscillations in the flow of shell/tube sides fluid
C. Vibrations transmitted through pig and/or supports due to external reasons
D. All A., B. and C.

Read More Vibrations in the tubes of a shell and tube heat exchanger is induced due to the _________________?

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