Heat Transfer (Chemical Perspective) – Multiple Choice Questions (MCQs)

1. 133. What is 'absorber' in solar energy applications?

   • A. A surface or material designed to maximize the absorption of solar radiation
   • B. A device that reflects solar radiation
   • C. A device that transmits solar radiation
   • D. A device that generates electricity from solar energy

2. 134. What is 'collector' in solar energy applications?

   • A. A device that collects solar radiation and converts it into useful heat or electricity
   • B. A device that absorbs all solar radiation
   • C. A device that reflects solar radiation
   • D. A device that stores solar energy

3. 135. What is the primary heat transfer mechanism in a domestic oven?

   • A. Convection and radiation
   • B. Conduction only
   • C. Radiation only
   • D. Convection only

4. 136. What is 'latent heat'?

   • A. Heat associated with a change in temperature without a phase change
   • B. Heat associated with a phase change at constant temperature
   • C. Heat transferred by conduction
   • D. Heat transferred by radiation

5. 137. What is the primary mode of heat transfer in solids?

   • A. Conduction
   • B. Convection
   • C. Radiation
   • D. Evaporation

6. 138. What is the primary mode of heat transfer in fluids (liquids and gases) with fluid motion?

   • A. Conduction
   • B. Convection
   • C. Radiation
   • D. Sublimation

7. 139. What is the mode of heat transfer that does not require a medium?

   • A. Conduction
   • B. Convection
   • C. Radiation
   • D. All of the above

8. 140. Which law describes the rate of heat transfer by conduction?

   • A. Newton's Law of Cooling
   • B. Fourier's Law of Heat Conduction
   • C. Stefan-Boltzmann Law
   • D. Fick's Law of Diffusion

9. 141. In Fourier's Law, what does 'k' represent?

   • A. Heat transfer coefficient
   • B. Thermal conductivity
   • C. Specific heat capacity
   • D. Heat flux

10. 142. What is the unit of thermal conductivity (k) in SI units?

    • A. W/(m·K)
    • B. J/(kg·K)
    • C. W/(m²·K)
    • D. W/m²

11. 143. What does a high thermal conductivity indicate?

    • A. Good insulator
    • B. Poor heat conductor
    • C. Good heat conductor
    • D. High specific heat

12. 144. Which law describes the rate of heat transfer by convection?

    • A. Newton's Law of Cooling
    • B. Fourier's Law of Heat Conduction
    • C. Stefan-Boltzmann Law
    • D. Fick's Law of Diffusion