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Chapter:

Steady-State-Conduction

1. Fourier law of heat conduction is best represented by


Hint Answer

2. Here are some assumptions that are made for Fourier law. Identify wrong one


Hint Answer

3. Consider following statements:
The Fourier heat conduction equation
Q = -k A d t /d x
Presumes
i) Steady state conditions
ii) Constant value of rmal conductivity
iii) Uniform temperature at wall surface
iv) One dimensional heat flow
Which of se statements are correct?


Hint Answer

4. The diagram shows heat conduction through a plane wall. The surface temperature is 475 K and it radiates heat to surroundings at 335 K. If rmal conductivity of material is 12.5 W/m degree, find temperature gradient. Let convective coefficient be 80 W/m2 degree and radiation factor is 0.9
The diagram shows heat conduction through a plane wall. The surface temperature is 475 K and it radiates heat to surroundings at 335 K. If rmal conductivity of material is 12.5 W/m degree, find temperature gradient. Let convective coefficient be 80 W/m2 degree and radiation factor is 0.9\r\n


Hint Answer

5. Negative sign in Fourier heat conduction equation indicates


Hint Answer

6. Transmission of heat i.e. molecular is smallest in case of


Hint Answer

7. Which one is not unit of rmal conductivity?


Hint Answer

8. “Thermal conductivity represents amount of heat conducted across unit area when a temperature difference of one kelvin”.


Hint Answer

9. Which of following is unit of rmal resistance?


Hint Answer

10. Mark matter with least value of rmal conductivity


Hint Answer

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Topics

This Chapter Steady-State-Conduction consists of the following topics

Fourier Equation and Thermal Conductivity

Fourier law of heat conduction is best represented by

;

Here are some assumptions that are made for Fourier law. Identify wrong one

;

Consider following statements:
The Fourier heat conduction equation
Q = -k A d t /d x
Presumes
i) Steady state conditions
ii) Constant value of rmal conductivity
iii) Uniform temperature at wall surface
iv) One dimensional heat flow
Which of se statements are correct?

;

The diagram shows heat conduction through a plane wall. The surface temperature is 475 K and it radiates heat to surroundings at 335 K. If rmal conductivity of material is 12.5 W/m degree, find temperature gradient. Let convective coefficient be 80 W/m2 degree and radiation factor is 0.9
The diagram shows heat conduction through a plane wall. The surface temperature is 475 K and it radiates heat to surroundings at 335 K. If rmal conductivity of material is 12.5 W/m degree, find temperature gradient. Let convective coefficient be 80 W/m2 degree and radiation factor is 0.9\r\n

;

Negative sign in Fourier heat conduction equation indicates

;

Transmission of heat i.e. molecular is smallest in case of

;

Which one is not unit of rmal conductivity?

;

“Thermal conductivity represents amount of heat conducted across unit area when a temperature difference of one kelvin”.

;

Which of following is unit of rmal resistance?

;

Mark matter with least value of rmal conductivity

;