Integrated Building Systems 1
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Questions and Answers

Which of the following is NOT a source of heat transfer in the building envelope?

  • Radiation
  • Evaporation (correct)
  • Convection
  • Conduction

    • What is the definition of the building envelope?

  • The external walls of a building
  • The conditioned space of a building
  • The combination of external walls, roof, and fenestrations (windows) (correct)
  • The roof of a building

    • What is the U-value of a material or assembly?

  • The rate of transfer of heat through matter
  • The thermal conductivity of a material
  • The amount of heat transferred through a material (correct)
  • The difference in temperature between two points

    • Which equation represents Fourier's Law of Conduction?

    <p>$q = k \cdot (T_2 - T_1)$</p> Signup and view all the answers

    What are the thermal properties of a material?

    <p>Thermal conductivity, thermal diffusivity, and specific heat capacity</p> Signup and view all the answers

    What is the R-value used for in the context of walls and roofs?

    <p>To measure the thermal resistance of a material or assembly</p> Signup and view all the answers

    How is the total thermal resistance (R-total) of multiple layers calculated?

    <p>By adding the individual thermal resistances of each layer</p> Signup and view all the answers

    What does the Solar Reflectance Index (SRI) indicate?

    <p>The ability of a material to reflect heat</p> Signup and view all the answers

    What is the U-value of a wall with an AAC block layer (thermal conductivity of 0.04 W/mK) and an XPS insulation layer (thermal conductivity of 0.13 W/mK)?

    <p>$U = 0.04 + 0.13$</p> Signup and view all the answers

    Which wall would be suitable for a cold climate based on U-values?

    <p>A wall with a U-value of 0.3</p> Signup and view all the answers

    Which unit is used to measure mechanical work?

    <p>Joules</p> Signup and view all the answers

    What is the definition of power?

    <p>The work done within a specific amount of time</p> Signup and view all the answers

    What is the unit used to measure heat?

    <p>Joules</p> Signup and view all the answers

    What is temperature a measure of?

    <p>Thermal energy held by a body of matter</p> Signup and view all the answers

    What happens in a closed system?

    <p>The total energy remains constant</p> Signup and view all the answers

    What is the equation for change in internal energy?

    <p>$\Delta U = Q - W$</p> Signup and view all the answers

    What is static equilibrium?

    <p>A state of balance with no movement</p> Signup and view all the answers

    What is dynamic equilibrium?

    <p>A state of balance with constant energy transfer</p> Signup and view all the answers

    What is the difference between hot climate design and cold climate design?

    <p>The temperature range</p> Signup and view all the answers

    How is heat transferred?

    <p>Conduction, convection, and radiation</p> Signup and view all the answers

    Which of the following is the equation for power?

    <p>$P = Q - W$</p> Signup and view all the answers

    Which of the following is the equation for heat transfer?

    <p>$\Delta U = Q - W$</p> Signup and view all the answers

    Which of the following is the equation for change in internal energy?

    <p>$\Delta U = Q - W$</p> Signup and view all the answers

    Which of the following is the equation for mechanical work?

    <p>$W = \Delta U + Q$</p> Signup and view all the answers

    Which of the following is the equation for total energy of a closed system?

    <p>$\Delta U = Q + W$</p> Signup and view all the answers

    Which of the following is NOT a source of heat transfer in the building envelope?

    <p>Insulation</p> Signup and view all the answers

    Which of the following is the unit used to measure heat?

    <p>Joules (J)</p> Signup and view all the answers

    Which of the following is the unit used to measure mechanical work?

    <p>Newton-meters (Nm)</p> Signup and view all the answers

    Which of the following is the unit used to measure power?

    <p>Watts (W)</p> Signup and view all the answers

    Which of the following is the unit used to measure temperature?

    <p>All of the above</p> Signup and view all the answers

    Which of the following is NOT a thermal property of a material?

    <p>Material Density</p> Signup and view all the answers

    What is the equation for thermal transmittance (U-value)?

    <p>U-value = (Thermal Conductivity) / (Thickness)</p> Signup and view all the answers

    What is the main purpose of the Solar Reflectance Index (SRI)?

    <p>To indicate the ability of a material to reflect heat</p> Signup and view all the answers

    What is the formula for calculating the total thermal resistance (R-total) of multiple layers?

    <p>R-total = Rse + R1 + R2 + R3 + R4 + Rsi</p> Signup and view all the answers

    What are the three forms of heat transfer?

    <p>Conduction, convection, radiation</p> Signup and view all the answers

    What is the equation for Fourier's Law of Conduction?

    <p>q = k * (T1 - T2) / (x0 - xL)</p> Signup and view all the answers

    What is the unit used to measure thermal conductivity?

    <p>W/m*K</p> Signup and view all the answers

    What is the definition of the building envelope?

    <p>The external walls, roofs, and vertical fenestrations of a building</p> Signup and view all the answers

    What is the formula for calculating the thermal transmittance (U-value) of a material or assembly?

    <p>U-value = (Thermal Conductivity) / (Thickness)</p> Signup and view all the answers

    What is the definition of thermal diffusivity?

    <p>How quickly a material reacts to temperature changes</p> Signup and view all the answers

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