Heat Transfer MCQ

Below Heat Transfer quiz are Multiple Choice Questions (MCQs) type Quiz. These Heat Transfer MCQ Questions helps you to refresh your Heat Transfer, you can see the correct option by clicking on it. .
  • 1. Air is best heated with steam in a heat exchanger of

    • plate type.
    • double pipe type with fin on steam side.
    • double pipe type with fin on air side.
    • shell and tube type.
  • 2. According to Prevost theory of heat exchange

    • It is impossible to transfer heat from low temperature source to t high temperature source
    • Heat transfer by radiation requires no medium
    • All bodies above absolute zero emit radiation
    • Heat transfer in most of the cases takes place by combination of conduction, convection and radiation
  • 3. Which of the following property of air does not increase with rise in temperature?

    • Thermal conductivity
    • Thermal diffusivity
    • Density
    • Dynamic viscosity
  • 4. Which of the following would lead to a reduction in thermal resistance?

    • In conduction, reduction in the thickness of the material and an increase in thermal conductivity.
    • In convection, stirring of the fluid and cleaning the heating surface.
    • In radiation, increasing the temperature and reducing the emissivity.
    • All of the above
  • 5. Total heat is the heat required to

    • Change vapour into liquid
    • Change liquid into vapour
    • Increase the temperature of a liquid or vapour
    • Convert water into steam and superheat it
  • 6. The most commonly used method for the design of duct size is the

    • Velocity reduction method
    • Equal friction method
    • Static regains method
    • Dual or double method
  • 7. Film coefficient is defined as Inside diameter of tube

    • Equivalent thickness of film
    • Thermal conductivity Equivalent thickness of film Specific heat × Viscosity
    • Thermal conductivity Molecular diffusivity of momentum Thermal diffusivity
    • Film coefficient × Inside diameter Thermal conductivity
  • 8. Film coefficient is defined as Inside diameter of tube

    • Equivalent thickness of film
    • Thermal conductivity Equivalent thickness of film Specific heat × Viscosity
    • Thermal conductivity Molecular diffusivity of momentum Thermal diffusivity
    • Film coefficient × Inside diameter Thermal conductivity
  • 9. The amount of radiation mainly depends upon the

    • Nature of the body
    • Temperature of the body
    • Type of surface of the body
    • All of these
  • 10. The amount of radiation mainly depends upon the

    • Nature of the body
    • Temperature of the body
    • Type of surface of the body
    • All of these
  • 11. The radiation emitted by a black body is known as

    • Black radiation
    • Full radiation
    • Total radiation
    • All of these