Heat transfer in aerospace systems (conduction, convection, radiation) MCQs – Aerospace

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1. Heat transfer through a solid material due to a temperature gradient is known as:



2. The primary mode of heat transfer in fluids is:



3. The heat transfer process that involves the emission and absorption of electromagnetic waves is:



4. In which type of heat transfer is a fluid moved to transfer heat from one place to another?



5. The thermal conductivity of a material is a measure of:



6. In aerospace systems, which heat transfer method is primarily used for cooling spacecraft?



7. The Nusselt number is a dimensionless parameter that characterizes:



8. Fourier’s law of heat conduction states that the heat flux is proportional to:



9. Which of the following is NOT a factor affecting heat transfer by convection?



10. In a vacuum, the dominant mode of heat transfer is:



11. The Stefan-Boltzmann law describes:



12. In a spacecraft, thermal control systems often use:



13. The heat transfer coefficient in convection depends on:



14. The Prandtl number is used in convection heat transfer to characterize:



15. In which scenario is conduction the primary mode of heat transfer?



16. Radiative heat transfer is most significant when:



17. The effectiveness of a heat shield is primarily based on:



18. In a convective heat transfer process, the boundary layer refers to:



19. The term “thermal diffusivity” refers to:



20. Which type of heat transfer is typically used in spacecraft thermal control systems to maintain temperature stability?



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