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

1. 61. What is 'thermal shock'?

   • A. Damage caused by rapid temperature changes
   • B. Damage caused by overheating
   • C. Damage caused by undercooling
   • D. Damage caused by chemical reactions

2. 62. What is 'quenching' process typically used for in metallurgy?

   • A. Rapid cooling to harden a material
   • B. Slow cooling to soften a material
   • C. Heating a material to high temperatures
   • D. Shaping a material

3. 63. What is a 'furnace' in chemical engineering?

   • A. An enclosed structure where materials are heated to very high temperatures
   • B. A device for cooling fluids
   • C. A device for mixing chemicals
   • D. A device for separating components

4. 64. What is 'radiation intensity'?

   • A. The rate at which radiation is emitted from a surface per unit area and per unit solid angle
   • B. The total energy emitted by radiation
   • C. The wavelength of radiation
   • D. The frequency of radiation

5. 65. 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

6. 66. 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

7. 67. What is the primary heat transfer mechanism in a domestic oven?

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

8. 68. 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

9. 69. What is the primary mode of heat transfer in solids?

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

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

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

11. 71. What is the mode of heat transfer that does not require a medium?

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

12. 72. 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