Poornima University Interview Questions and Answers

Critical pressure and temperature are the minimum values required to convert a gas into a liquid state.

• Critical pressure is the minimum pressure required to liquefy a gas at its critical temperature.

• Critical temperature is the temperature above which a gas cannot be liquefied, regardless of the pressure applied.

• Boilers operate at high pressures and temperatures, and understanding critical pressure and temperature is im...read more

Conduction is the transfer of heat through a material while convection is the transfer of heat through a fluid or gas.

• Conduction occurs in solids while convection occurs in fluids or gases.

• Conduction requires direct contact between the two materials while convection requires movement of the fluid or gas.

• Conduction is slower than convection.

• Examples of conduction include touching a hot stove and feeling the heat transfe...read more

Nusselt number is a dimensionless number used in heat transfer to describe the ratio of convective to conductive heat transfer across a boundary layer.

• Nusselt number is used to determine the heat transfer coefficient in convective heat transfer.

• It is defined as the ratio of convective to conductive heat transfer across a boundary layer.

• It is named after Wilhelm Nusselt, a German engineer.

• Nusselt number is used in vario...read more

Nusselt number is a dimensionless number used in heat transfer while Boit number is used in fluid dynamics.

• Nusselt number is used to determine the convective heat transfer coefficient in a fluid

• Boit number is used to determine the ratio of inertial forces to viscous forces in a fluid

• Nusselt number is calculated using the ratio of convective to conductive heat transfer

• Boit number is calculated using the ratio of inertia...read more