Chemical Heat Transfer

In forced circulation, the heating element is injected_________________?

Byadmin March 2, 2019August 24, 2021

In forced circulation, the heating element is injected_________________?

A. Internally
B. Externally
C. Both A. and A.
D. Neither A. nor B.

Chemical Heat Transfer

For a counter current heat exchanger with Ti h = 80°C, T°c = 60°C, T°h = 50°C and Ti c = 30°C, and the temperature difference between the two streams being the same everywhere along Z, the direction of flow of hot fluid. The temperature profile should satisfy___________________?

For a counter current heat exchanger with Ti h = 80°C, T°c = 60°C, T°h = 50°C and Ti c = 30°C, and the temperature difference between the two streams being the same everywhere along Z, the direction of flow of hot fluid. The temperature profile should satisfy___________________?

A. d2T/dZ2 > 0
B. d2T/dZ2 = 0
C. d2T/dZ2 < 0
D. dT/dZ = 0

Read More For a counter current heat exchanger with Ti h = 80°C, T°c = 60°C, T°h = 50°C and Ti c = 30°C, and the temperature difference between the two streams being the same everywhere along Z, the direction of flow of hot fluid. The temperature profile should satisfy___________________?
Chemical Heat Transfer

Steam traps are provided in steam carrying pipelines to_________________?

Steam traps are provided in steam carrying pipelines to_________________?

A. Condense steam
B. Release excess steam pressure by bleeding steam
C. Remove condensate and inert gases
D. None of these

Read More Steam traps are provided in steam carrying pipelines to_________________?
Chemical Heat Transfer

A wall has two layers of materials A and B; each made of a different material. Both the layers have the same thickness. The thermal conductivity of material A is twice that of B. Under the equilibrium, the temperature difference across the wall is 36°C. The temperature difference across the layer A is ______________ °C?

A wall has two layers of materials A and B; each made of a different material. Both the layers have the same thickness. The thermal conductivity of material A is twice that of B. Under the equilibrium, the temperature difference across the wall is 36°C. The temperature difference across the layer A is ______________ °C?

A. 6
B. 12
C. 18
D. 24

Read More A wall has two layers of materials A and B; each made of a different material. Both the layers have the same thickness. The thermal conductivity of material A is twice that of B. Under the equilibrium, the temperature difference across the wall is 36°C. The temperature difference across the layer A is ______________ °C?
Chemical Heat Transfer

What is the thermal conductivity of a perfect heat insulator ?

What is the thermal conductivity of a perfect heat insulator ?

A. Zero
B. One
C. ∞
D. Between 0 and ∞

Read More What is the thermal conductivity of a perfect heat insulator ?
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

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_________________?

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