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