Integrated Building Systems 1
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Questions and Answers

Which tool is considered the most handy for designers when reading a Psychrometric Chart?

  • RH Line
  • Psychrometric Chart (correct)
  • Interactive Chart
  • Dew Point

    • What is the Dew Point for the given conditions of Outside (92 F) RH: 60%?

  • 60%
  • 92 F
  • 77 F (correct)
  • 68 F

    • What is the moisture buffer capacity of a material called?

  • Drying
  • Adsorption (correct)
  • Absorption
  • Permeance

    • What unit of measurement is used to characterize the water vapor permeance of materials?

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

    What does a good Vapor Barrier do?

    <p>Keep the Water Out</p> Signup and view all the answers

    What drives diffusive moisture transport?

    <p>Difference in Absolute Humidity</p> Signup and view all the answers

    What happens when moisture doesn't dry out?

    <p>Accumulates on surfaces</p> Signup and view all the answers

    What is the ratio that drives evaporation?

    <p>Relative Humidity</p> Signup and view all the answers

    What is the formula for calculating the amount of water vapor a material allows through over a period of time?

    <p>1 Perm = 1 grain of water vapor per hour per square foot per inch of mercury</p> Signup and view all the answers

    Where should the vapor barrier be set to avoid condensation?

    <p>Towards the warmer side</p> Signup and view all the answers

    Which of the following is NOT a property of windows mentioned in the text?

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

    What is the formula for calculating the Projection Factor (PF) for vertical fins and overhangs?

    <p>PF = (Total Heat Gain) / (Glass Area)</p> Signup and view all the answers

    What is the contribution of Solar Heat Gain Coefficient (SHGC) to the Total Heat Gain?

    <p>80%</p> Signup and view all the answers

    What is the formula for calculating the Total Heat Gain?

    <p>Total Heat Gain = (SHGC contribution) + (U_value contribution)</p> Signup and view all the answers

    What is the formula for calculating the U-value contribution to the Total Heat Gain?

    <p>U_value contribution = 20%</p> Signup and view all the answers

    What are the three states (phases) in which water exists around us?

    <p>Solid, Liquid, Gas</p> Signup and view all the answers

    What is the process called when the water phase changes from solid to liquid?

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

    What is the process called when the water phase changes from liquid to gas?

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

    Is water considered a form of mass transfer or energy transfer?

    <p>Mass transfer</p> Signup and view all the answers

    Which of the following is NOT a property of water mentioned in the text?

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

    Which of the following is NOT a process that can cause phase change in water?

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

    At what temperature does water boil at 1 atm pressure?

    <p>100°C</p> Signup and view all the answers

    What is the phase of water at 0°C (32°F) and 1 atm pressure?

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

    Which type of energy raises the temperature of a substance?

    <p>Sensible energy</p> Signup and view all the answers

    What is the sum of sensible and latent energy called?

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

    Which process of moisture transport involves movement from a region of higher humidity concentration to lower concentration?

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

    What is the ratio of the mass of moisture in the air over the mass of dry air called?

    <p>Absolute humidity</p> Signup and view all the answers

    How is relative humidity affected by temperature?

    <p>It decreases with temperature</p> Signup and view all the answers

    What is the formula to calculate the relative humidity?

    <p>Relative Humidity (%) = (Mass of Water Vapor in the Air) / (Mass of Water Vapor the Air Can Hold at That Temperature) x 100</p> Signup and view all the answers

    What is the ratio of the mass of dry air to the mass of water vapor in the air called?

    <p>Specific humidity</p> Signup and view all the answers

    Which property of windows is calculated by dividing the solar heat gain by the incident solar radiation energy?

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

    What is the formula for calculating the Total Heat Gain?

    <p>ER + EA + ET = 100 %</p> Signup and view all the answers

    What is the formula for calculating the Projection Factor (PF) for vertical fins and overhangs?

    <p>Projection Factor Calculation</p> Signup and view all the answers

    What drives diffusive moisture transport?

    <p>Temperature difference</p> Signup and view all the answers

    What is the ratio of the mass of moisture in the air over the mass of dry air called?

    <p>Relative humidity</p> Signup and view all the answers

    What unit of measurement is used to characterize the water vapor permeance of materials?

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

    What is the formula for calculating the amount of water vapor a material allows through over a period of time?

    <p>Perm x Area x Time</p> Signup and view all the answers

    Which of the following is NOT a property of windows mentioned in the text?

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

    What is the process called when the water phase changes from solid to liquid?

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

    What is the contribution of Solar Heat Gain Coefficient (SHGC) to the Total Heat Gain?

    <p>80 %</p> Signup and view all the answers

    Which of the following is the formula for calculating the moisture buffer capacity of a material?

    <p>$g/m^2$</p> Signup and view all the answers

    What is the process called when moisture sticks on the surface of a material?

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

    What is the unit of measurement used to characterize the water vapor permeance of materials?

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

    What is the formula for calculating the amount of water vapor a material allows through over a period of time?

    <p>1 Perm = 1 grain/(ft^2<em>hr</em>inHg)</p> Signup and view all the answers

    What is the difference in Absolute Humidity that drives diffusive moisture transport?

    <p>The difference in Absolute Humidity</p> Signup and view all the answers

    What is the ratio of Relative Humidity that drives evaporation?

    <p>The ratio of Relative Humidity</p> Signup and view all the answers

    What is the phase of water at 0°C (32°F) and 1 atm pressure?

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

    What does a good Vapor Barrier do?

    <p>Keep the water out and let it out if it gets in</p> Signup and view all the answers

    What are the three states (phases) in which water exists around us?

    <p>Solid, liquid, gas</p> Signup and view all the answers

    Where should the vapor barrier be set to avoid condensation?

    <p>Towards the warmer side</p> Signup and view all the answers

    Which of the following is NOT a process that can cause phase change in water?

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

    What is the formula to calculate the relative humidity?

    <p>$RH = \frac{M_{water}}{M_{air} + M_{water}}$</p> Signup and view all the answers

    What is the ratio of the mass of dry air to the mass of water vapor in the air called?

    <p>Absolute Humidity</p> Signup and view all the answers

    Which of the following is NOT a property of water mentioned in the text?

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

    What is the process called when the water phase changes from solid to liquid?

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

    What is the phase of water at 0°C (32°F) and 1 atm pressure?

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

    What is the contribution of Solar Heat Gain Coefficient (SHGC) to the Total Heat Gain?

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

    What is the formula for calculating the amount of water vapor a material allows through over a period of time?

    <p>$WV = A \cdot P \cdot t \cdot R$</p> Signup and view all the answers

    What is the moisture buffer capacity of a material called?

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

    What is the process called when the water phase changes from liquid to gas?

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

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