Quiz - Radiation Copy | ANSYS Innovation Courses

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Question 1 of 15

1. Question
In the campfire simulation example, which of the following bodies are in the same enclosure?
- 1. Human body and Wood
- 2. Wood and Ground
- 3. Human Body and Ground
- 4. Human body, Wood and Ground
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Question 2 of 15

2. Question
Which of the following statements is correct about Radiation?
- 1. Energy transfer occurs in form of electromagnetic waves
- 2. No intermediate medium is required
- 3. Both 1 & 2
- 4. None of the above
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Question 3 of 15

3. Question
The campfire simulation example indicates the importance of which of the following parameters for radiative heat transfer?
- 1. Material Properties
- 2. Film Coefficient
- 3. View Factors
- 4. None of the above
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Question 4 of 15

4. Question
Which term is considered the same as emissivity in solving practical engineering problems?
- 1. Transmissivity - τ
- 2. Absorptivity - α
- 3. Reflectivity - ρ
- 4. All the above
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Question 5 of 15

5. Question
Which of the following statements is true about a white body?
- 1. It reflects all the radiation into one direction
- 2. It reflects most of the radiation uniformly in all the directions
- 3. It reflects all the radiation uniformly in all the directions
- 4. It reflects most of the radiation into one direction
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Question 6 of 15

6. Question
Which of the following statement is true about a black body?
- 1. Its emissivity and absorptivity values are greater than that of a gray body
- 2. Its emissivity and absorptivity values are dependent on the wavelength
- 3. It exists in reality.
- 4. None of the above
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Question 7 of 15

7. Question
Which of the following statements is true about radiation?
- 1. When two bodies are put near, only the higher temperature body emits radiation
- 2. Among the energy the sun transferred to earth, radiation contributes only a small part, and convection takes most of the heat transfer
- 3. Radiation is influence by many factors like thermal conductivity and thermal capacitance
- 4. Radiation between two surfaces can be influenced by how far they are from each other
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Question 8 of 15

8. Question
View factors are dependent upon which of the following parameters?
- 1. Temperature
- 2. Geometry
- 3. View Factors
- 4. All the above
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Question 9 of 15

9. Question
Which of the following statements is true about emissivity?
- 1. Emissivity is influenced by surface properties and view factor
- 2. Rough surfaces are more likely to have a low emissivity than mirror-like reflective surfaces
- 3. Emissivity may vary with wavelength
- 4. Emissivity is not dependent on temperature and thermal conductivity.
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Question 10 of 15

10. Question
For self-viewing surfaces, select the best answer where the view factor is equal to zero:
- 1. Planar
- 2. Convex
- 3. Both Planar and Convex
- 4. None of the above
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Question 11 of 15

11. Question
For the simulation of cake in an oven, which of the following statements is true?
- 1. Inner convection plays little effect in heating the cake
- 2. Inner convection makes the temperature distribution on the cake more even
- 3. Radiation is only absorbed at the top surface of the cake
- 4. Conduction is also a main heat transfer method in heating up the cake
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Question 12 of 15

12. Question
View factor for arbitrary geometries are found using which of the following methods?
- 1. Hand Calculations
- 2. Numerical Methods
- 3. Experiments
- 4. None of the above
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Question 13 of 15

13. Question
The "Commands (APDL)" object in the simulation of the baking of a cake was used to remove the bulk temperature of the inner convection boundary condition. Pick the correct reason why this was performed:
- 1. It speeds up the solution
- 2. To leave bulk temperature undefined and then the Mechanical solver will then calculate a bulk temperature that provides thermal equilibrium
- 3. It increases radiation and helps to bake the cake
- 4. None of the above
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Question 14 of 15

14. Question
For the simulation example showing the baking of a cake in an oven, which of the following statements is correct?
- 1. Inner convection does not add/remove heat to/from the system
- 2. Inner convection does add/remove heat to/from the system
- 3. The glass door is not an opaque body
- 4. All the above
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Question 15 of 15

15. Question
For the bathroom heat lamp problem, why is the temperature of the area under the sink comparatively lower than the rest of the area of the floor?
- 1. The convection under the sink is lower than the rest of the space
- 2. The view factor from the lamp to the area under the sink is low because the sink blocks the view
- 3. The material of the floor is not uniform for heat transfer
- 4. The heat lamp is too far away from that area of the floor
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Quiz - Radiation Copy

Quiz - Radiation Copy

Quiz Summary

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1. Question

In the campfire simulation example, which of the following bodies are in the same enclosure?

2. Question

Which of the following statements is correct about Radiation?

3. Question

The campfire simulation example indicates the importance of which of the following parameters for radiative heat transfer?

4. Question

Which term is considered the same as emissivity in solving practical engineering problems?

5. Question

6. Question

Which of the following statement is true about a black body?

7. Question

8. Question

View factors are dependent upon which of the following parameters?

9. Question

10. Question

For self-viewing surfaces, select the best answer where the view factor is equal to zero:

11. Question

12. Question

View factor for arbitrary geometries are found using which of the following methods?

13. Question

14. Question

For the simulation example showing the baking of a cake in an oven, which of the following statements is correct?

15. Question