THERMODYNAMICS -ENGINEERING
EXAM STUDY GUIDE QUESTIONS AND
ANSWERS
thermal equilibrium - ANSWER-property of thermodynamic systems in which all parts of
the system have attained a UNIFORM TEMPERATURE which is the same of that of the
system's surroundings
thermodynamic system - ANSWER-A PART OF THE PHYSICAL WORLD as described
by its thermodynamic properties such as temperature, volume, pressure, concentration,
surface tension, and viscosity.
Thermodynamics - ANSWER-THE STUDY of the effects of work, heat, and energy on a
system.
U-Value (CONDUCTIVITY) - ANSWER-A measure of thermal transmittance through a
material
conduction - ANSWER-transfer of heat within an object or between objects by molecular
activity, WITHOUT ANY NET EXTERNAL MOTION
convection - ANSWER-process by which, in a fluid being heated, the warmer part of the
mass will rise and the cooler portion will sink
electromagnetic energy - ANSWER-Energy caused by the movement of light waves.
Energy - ANSWER-the ability to do work
1st law of thermodynamics - ANSWER-law that heat is a form of energy, and the total
amount of energy of all kinds in an isolated system is constant; it is an application of the
principle of conservation of energy A.K.A. CONSERVATION OF ENERGY
Heat - ANSWER-ENERGY IN TRANSIT due to a temperature difference between the
source from which the energy is coming and a sink toward which the energy is going
Kelvin - ANSWER-Unit of absolute temperature, symbol is K
Radiation - ANSWER-process by which energy is TRANSMITTED THROUGH A
MEDIUM, including empty space, as electromagnetic waves; travels at speed of light;
aka electromagnetic radiation
R-Value - ANSWER-measure of RESISTANCE to heat flow
EXAM STUDY GUIDE QUESTIONS AND
ANSWERS
thermal equilibrium - ANSWER-property of thermodynamic systems in which all parts of
the system have attained a UNIFORM TEMPERATURE which is the same of that of the
system's surroundings
thermodynamic system - ANSWER-A PART OF THE PHYSICAL WORLD as described
by its thermodynamic properties such as temperature, volume, pressure, concentration,
surface tension, and viscosity.
Thermodynamics - ANSWER-THE STUDY of the effects of work, heat, and energy on a
system.
U-Value (CONDUCTIVITY) - ANSWER-A measure of thermal transmittance through a
material
conduction - ANSWER-transfer of heat within an object or between objects by molecular
activity, WITHOUT ANY NET EXTERNAL MOTION
convection - ANSWER-process by which, in a fluid being heated, the warmer part of the
mass will rise and the cooler portion will sink
electromagnetic energy - ANSWER-Energy caused by the movement of light waves.
Energy - ANSWER-the ability to do work
1st law of thermodynamics - ANSWER-law that heat is a form of energy, and the total
amount of energy of all kinds in an isolated system is constant; it is an application of the
principle of conservation of energy A.K.A. CONSERVATION OF ENERGY
Heat - ANSWER-ENERGY IN TRANSIT due to a temperature difference between the
source from which the energy is coming and a sink toward which the energy is going
Kelvin - ANSWER-Unit of absolute temperature, symbol is K
Radiation - ANSWER-process by which energy is TRANSMITTED THROUGH A
MEDIUM, including empty space, as electromagnetic waves; travels at speed of light;
aka electromagnetic radiation
R-Value - ANSWER-measure of RESISTANCE to heat flow
