Chemical Heat Transfer

Crystallisation of solids from a homogeneous solution is a/an ______________ process?

Byadmin March 3, 2019August 24, 2021

Crystallisation of solids from a homogeneous solution is a/an ______________ process?

A. Exothermic
B. Mildly endothermic
C. Highly endothermic
D. None of these

Chemical Heat Transfer

With increase in temperature, the thermal conductivity of steel___________________?

With increase in temperature, the thermal conductivity of steel___________________?

A. Increases
B. Decreases
C. Remains unchanged
D. Increases exponentially

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

Fluid motion in the natural convection heat transfer between a solid surface and a fluid in contact with it, results from the_________________?

Fluid motion in the natural convection heat transfer between a solid surface and a fluid in contact with it, results from the_________________?

A. Existence of thermal boundary layer
B. Temperature gradient produced due to density difference
C. Buoyancy of the bubbles produced at active nucleation site
D. None of these

Read More Fluid motion in the natural convection heat transfer between a solid surface and a fluid in contact with it, results from the_________________?
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 _________________?
Chemical Heat Transfer

The unit of heat transfer co-efficient in SI unit is____________________?

The unit of heat transfer co-efficient in SI unit is____________________?

A. J/M2°K
B. W/m2°K
C. W/m°K
D. J/m°K

Read More The unit of heat transfer co-efficient in SI unit is____________________?
Chemical Heat Transfer

Three materials A, B and C of equal thickness and of thermal conductivity of 20, 40 & 60 kcal/hr. m. °C respectively are joined together. The temperature outside of A and C are 30°C and 100°C respectively. The interface between B and C will be at a temperature of ____________ °C?

Three materials A, B and C of equal thickness and of thermal conductivity of 20, 40 & 60 kcal/hr. m. °C respectively are joined together. The temperature outside of A and C are 30°C and 100°C respectively. The interface between B and C will be at a temperature of ____________ °C?

A. 40
B. 95
C. 70
D. 50

Read More Three materials A, B and C of equal thickness and of thermal conductivity of 20, 40 & 60 kcal/hr. m. °C respectively are joined together. The temperature outside of A and C are 30°C and 100°C respectively. The interface between B and C will be at a temperature of ____________ °C?
Chemical Heat Transfer

What is the geometric mean of two heat transfer areas A1 and A2 ?

What is the geometric mean of two heat transfer areas A1 and A2 ?

A. √(A1 . A2)
B. √(A1 + A2)
C. ½ √(A1 . A2)
D. 2 √(A1 . A2)

Read More What is the geometric mean of two heat transfer areas A1 and A2 ?

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