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

What are the thermal properties of a material?

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

What does the Solar Reflectance Index (SRI) indicate?

<p>The ability of a material to reflect heat (A)</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>$U = 0.04 + 0.13$ (C)</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 (C)</p> Signup and view all the answers

Which unit is used to measure mechanical work?

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

What is the definition of power?

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

What is the unit used to measure heat?

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

What is temperature a measure of?

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

What happens in a closed system?

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

What is the equation for change in internal energy?

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

What is static equilibrium?

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

What is dynamic equilibrium?

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

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

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

How is heat transferred?

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

Which of the following is the equation for power?

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

Which of the following is the equation for heat transfer?

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

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

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

Which of the following is the equation for mechanical work?

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

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

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

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

<p>Insulation (C)</p> Signup and view all the answers

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

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

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

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

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

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

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

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

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

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

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

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

What are the three forms of heat transfer?

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

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

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

What is the unit used to measure thermal conductivity?

<p>W/m*K (C)</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 (B)</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) (C)</p> Signup and view all the answers

What is the definition of thermal diffusivity?

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

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