Heat Transfer (Exam 1) UPDATED ACTUAL Questions and CORRECT Answers

Heat Transfer (Exam 1) UPDATED
ACTUAL Questions and CORRECT
Answers
Heat Transfer (Definition) - CORRECT ANSWER✔✔- A discipline of thermal engineering
that concerns the exchange of thermal energy from one physical system to another.


Basic Requirement/Driving Force for HT - CORRECT ANSWER✔✔- Temperature
Difference


Direction of Heat Transfer? - CORRECT ANSWER✔✔- Decreasing Temperature



Thermodynamics - CORRECT ANSWER✔✔- - Amount of Energy Transferred
- Considers End State of Process
- Concerned with Equilibrium States
- Makes No Reference to Time (how long?)


Heat Transfer (What it deals with) - CORRECT ANSWER✔✔- - Deals with determination of
the rates of energy transfer
- A non-equilibrium phenomenon


Rating - CORRECT ANSWER✔✔- Determining the heat transfer rate of an existing system
at a given temperature difference


Sizing - CORRECT ANSWER✔✔- Determining the size of a system in order to transfer heat
at a special rate or specific temperature difference


Internal Energy - CORRECT ANSWER✔✔- The sum of all microscopic forms of energy



Sensible Heat - CORRECT ANSWER✔✔- The kinetic energy of molecules

, Latent Heat - CORRECT ANSWER✔✔- Internal energy associated with the phase change of
a system


Chemical Energy - CORRECT ANSWER✔✔- Internal energy associated with the atomic
bonds in a molecule


Nuclear Energy - CORRECT ANSWER✔✔- Internal energy associated with bonds within
the nucleus or atom itself


Specific Heat - CORRECT ANSWER✔✔- The energy required to raise the temperature of a
unit by 1 degree


Equation for Specific Heat (Constant Volume) - CORRECT ANSWER✔✔- Cv=(du/dT)



Equation for Specific Heat (Constant Pressure) - CORRECT ANSWER✔✔- Cp=(dh/dT)



Equation for Specific Heat (Incompressible) - CORRECT ANSWER✔✔- Cv=Cp=C



What is different about specific heat of Ideal Gases? - CORRECT ANSWER✔✔- Instead of
depending on two properties (i.e. T & P), depends only on temperature (T)


Energy Transfer by Work - CORRECT ANSWER✔✔- Power; Work done per unit time
(Watts)


Energy Transfer by Heat - CORRECT ANSWER✔✔- Heat Transfer Rate (Q-dot); Amount
transferred per unit time


Heat Flux - CORRECT ANSWER✔✔- Rate of heat transfer per unit area normal to direction
(q-dot=(Q-dot)/(A)


Conduction - CORRECT ANSWER✔✔- Transfer from more energetic particles of a
substance to the adjacent, less energetic ones as a result of interactions between the particles