Heat Transfer Chapter 1

What is Heat?

• Form of temperature that can be transferred from one system to another .

• Form of energy that can be transferred from one system to another as a result of temperature difference.

• Form of energy that can be transferred from one system to another without any temperature difference

• None of the above

Which statement is FALSE?

• The temperature difference is the driving force for heat transfer.

• The transfer of energy as heat is always from the higher-temperature medium to the lower-temperature one

• The larger the temperature gradient, the higher the rate of heat transfer

• None of the above

Which of the following is a method of heat transfer?

• Convection

• Conduction

• Radiation

• All of the mentioned

Heat transfer takes place according to which of the following law?

• Second law of thermodynamics

• Newton’s law of cooling

• First law of thermodynamics

• Newton’s second law of motion

Which of the following is the rate of heat transfer unit?

• Joule

• Pascal

• Watt

• Newton

Radiation heat transfer is characterized by

• Movement of discrete packets of energy as electromagnetic waves

• Due to bulk fluid motion, there is a transport of energy

• There is the circulation of fluid by buoyancy effects

• Thermal energy transfer as vibrational energy in the lattice structure of the material

In solids conduction occurred due to?

• The combination of diffusion of the

    molecules in a lattice and the energy

    transport by free electrons.

• The collisions and diffusion of the

    molecules during their random motion

• The collisions and lattice of the

    molecules during their random motion

• The combination of vibrations of the

    molecules in a lattice and the energy

    transport by free electrons.

The transfer of energy from the more energetic particles of a substance to the adjacent less energetic ones as a result of interactions between the particles.

This statement is referring to the___________

• radiation

• convection

• conduction

The mode of energy transfer between a solid surface and the adjacent liquid or gas that is in motion, and it involves the combined effects of conduction and fluid motion

This statement is referring to the___________

• radiation

• convection

• conduction

The convection heat transfer coefficient 'h' is a property of the fluid...

• Yes

• No