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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