Interview Questions and Answers on Conduction
What is conduction?
Conduction is the transfer of heat or electricity through a material without any motion of the material itself.
Can you give an example of conduction in daily life?
Cooking on a stove is an example of conduction. The heat from the stove is transferred to the pot through the bottom of the pot.
How does conduction work?
Conduction works by the transfer of energy from one particle to another in a material. The energy is transferred from particle to particle until it reaches the other end of the material.
What is the difference between conduction and convection?
Conduction is the transfer of heat through a material without any motion of the material itself. Convection, on the other hand, is the transfer of heat through the motion of a fluid, such as a liquid or a gas.
What is the difference between conduction and radiation?
Conduction is the transfer of heat or electricity through a material without any motion of the material itself. Radiation is the transfer of energy through electromagnetic waves, such as light, infrared, and ultraviolet radiation.
What factors affect the rate of conduction?
The rate of conduction is affected by the material’s thermal conductivity, temperature difference, and the cross-sectional area.
What is thermal conductivity?
Thermal conductivity is a measure of a material’s ability to conduct heat. It is the amount of heat transferred through a material per unit time per unit surface area per unit temperature difference.
Can you give an example of a material with high thermal conductivity?
Copper is an example of a material with high thermal conductivity.
What is the difference between a conductor and an insulator?
A conductor is a material that allows electricity or heat to flow through it easily. An insulator, on the other hand, is a material that does not allow electricity or heat to flow through it easily.
Can you give an example of a conductor and an insulator?
Copper is an example of a conductor, while glass or plastic is an example of an insulator.
What is a superconductor?
A superconductor is a material that has zero electrical resistance and perfect conductivity.
What are the applications of conduction?
Conduction has many applications, including heating and cooling, electrical power transmission, and thermoelectric power generation.
Can you explain the concept of Joule heating?
Joule heating, also known as Ohmic heating, is the heat produced in a material due to the passage of an electric current.
What is a thermocouple?
A thermocouple is a device used to measure temperature by using the principles of thermoelectric conduction.
What is a thermopile?
A thermopile is a device that converts thermal energy into electrical energy by using multiple thermocouples connected in series.
What is a heat sink?
A heat sink is a device used to dissipate heat from an electronic component or device.
What is a heat exchanger?
A heat exchanger is a device used to transfer heat from one fluid to another without mixing the two fluids.
What is a thermal bridge?
A thermal bridge is a part of a building envelope that has a lower thermal resistance than the surrounding material, allowing heat
What is the purpose of a thermal insulation material?
The purpose of a thermal insulation material is to reduce heat transfer and improve the energy efficiency of a building by slowing down the flow of heat.
Can you explain the difference between single- and double-paned windows?
Single-paned windows consist of only one layer of glass, which provides little insulation against heat transfer. Double-paned windows, on the other hand, consist of two layers of glass with a small air gap in between, providing better insulation and reducing heat transfer.
What is a heat pump?
A heat pump is a device used to transfer heat from one location to another, typically from the ground or outside air to the inside of a building.
What is a radiant barrier?
A radiant barrier is a material used to reduce heat transfer by radiation. It reflects thermal radiation, which helps to keep a building cooler in the summer and warmer in the winter.
What is a phase change material?
A phase change material is a material that changes phase (from solid to liquid or vice versa) at a certain temperature. It can be used for thermal energy storage as it can absorb and release large amounts of heat during the phase change process.
Can you explain the term “heat capacity”?
Heat capacity is a measure of the amount of heat required to change the temperature of a substance. It is the amount of heat energy required to raise the temperature of a material by one degree Celsius.
What is thermal mass?
Thermal mass is a term used to describe the amount of thermal energy stored in a material. High thermal mass materials, such as concrete or masonry, can absorb and store large amounts of heat energy, making them useful for thermal energy storage in buildings.