Monday, April 11, 2016

Insulation and Interior Inspection Section#1 Insulation and Ventilation Quiz#6

This study session covers the materials and characteristics of air/vapor barriers.
The estimated completion time for this study session is sixty minutes.
Objectives
At the end of this study session, you should be able to:
  • Describe in one sentence the function of an air barrier.
  • Give two reasons it is important to control air movement through building walls and roofs.
  • Describe in one sentence the function of a vapor barrier.
  • List two other names for vapor barriers.
  • List six qualities of a good air barrier.
  • List ten building materials that may act as an air barrier.
  • List five qualities of a good vapor barrier.
  • Indicate whether it is more important for an air barrier or a vapor barrier to be continuous.
  • Indicate whether vapor barriers should be on the warm or cold side of walls.
  • Define perm in one sentence.
  • List seven common building materials that may act as vapor barriers.
  • Explain in two sentences why a vapor barrier should be laid on an earth floor in a crawlspace.

  • Question 1

    Needs Grading
    Ungraded
    Define imperial.
    Selected Answer:

    An imperial perm is the number of grains of water that will move through one square foot of material in one hour, under a pressure difference of one inch of mercury. One grain is 0.002285 ounces.
    Correct Answer:
    Correct 
    Imperial ? the number of grains of water that will move through one square foot of a material per hour under a 1-inch (Mercury) pressure differential.
    Response Feedback:[None Given]

  • Question 2

    Needs Grading
    Ungraded
    Describe the function of a vapour barrier.
    Selected Answer:

    The function of vapor barrier is to protect the wall from moisture damage due to vapor diffusion. 
    Correct Answer:
    Correct 
    To protect the building from moisture damage. Designed to protect from moisture due to air movement, not vapour diffusion.
    Response Feedback:[None Given]

  • Question 3

    Needs Grading
    Ungraded
    Indicate two reasons we are interested in controlling air movement through building walls and roofs.
    Selected Answer:

    1. Air carries heat. We want to minimize the flow of building heat to the outdoors. 
    2. Air carries moisture. This moisture may be deposited in the building structure as it cools and condenses. This can cause damage to the building. 
    Correct Answer:
    Correct 
    1. Minimize heat flow to exterior/interior 2. Minimize moisture flow to building components
    Response Feedback:[None Given]

  • Question 4

    Needs Grading
    Ungraded
    List at least 10 building materials that may act as an air barrier. (You may come up with 12.)
    Selected Answer:

    1. Polyethylene
    2. Housewraps
    3. Foam insulation boards
    4. Drywall, plaster and wood paneling
    5. Sheathing
    6. Building paper 
    7. Sill gaskets
    8. Gaskets for electrical boxes and plastic enclosures around electrical boxes
    9. Backer rods
    10. Caulking and weather stripping
    11. Polyurethane foams
    12. Duct tape and duct mastic. 
    Correct Answer:
    Correct
    1. Polyethylene 2. Housewraps 3. Foam insulation boards 4. Drywall, plaster, and wood paneling 5. Sheathing 6. Asphalt impregnated fibreboard 7. Building paper 8. Sill gaskets 9. Gaskets for electrical boxes and plastic enclosures around electrical boxes 10. Backer rods 11. Caulking and weatherstripping 12. Polyurethane foams 13. Duct tape and duct mastic
    Response Feedback:[None Given]

  • Question 5

    Needs Grading
    Ungraded
    List five qualities of a good vapour barrier.
    Selected Answer:

    1. Vapor diffusion resistant
    2. Durable
    3. Moisture and rot resistant
    4. Chemically inert
    5. Inexpensive
    Correct Answer:
    Correct 
    1. Retards vapour diffusion 2. Durable 3. Moisture and rot resistant 4. Chemically inert 5. Inexpensive
    Response Feedback:[None Given]

  • Question 6

    Needs Grading
    Ungraded
    List seven common building materials that may act as vapour barriers.
    Selected Answer:

    1. Polyethylene film
    2. Kraft paper
    3. Aluminum foil
    4. Oil-based paints and vapor-retardant patins
    5. Insulations
    6. Vinyl wallpaper
    7. Plywood and OSB sheathings
    Correct Answer:
    Correct 
    1. Polyethylene film 2. Kraft paper 3. Aluminum foil 4. Oil-based paints and vapour retardant paints 5. Insulations 6. Vinyl wallpaper 7. Plywood and OSB sheathings
    Response Feedback:[None Given]

  • Question 7

    Needs Grading
    Ungraded
    List six qualities of a good air barrier.
    Selected Answer:

    1. Stop air movement
    2. Durable, ideally lasting the life of the building
    3. Strong and either rigid or well enough supported to stay in place
    4. Continuous. An air barrier that is 99 percent intact can't do its job
    5. Inexpensive
    6. Resistant to moisture, rot and chemical
    Correct Answer:
    Correct 
    1. Stops air movement 2. Durable 3. Strong, and either rigid or well enough supported to stay in place 4. Continuous 5. Inexpensive 6. Resistant to moisture, rot, and chemicals
    Response Feedback:[None Given]

  • Question 8

    Needs Grading
    Ungraded
    List two other names for vapour barriers.
    Selected Answer:

    Vapor retarder
    Vapor diffusion retarder
    Correct Answer:
    Correct 
    Vapour retarder, vapour diffusion retarder (VDR)
    Response Feedback:[None Given]

  • Question 9

    Needs Grading
    Ungraded
    What is the function of an air barrier?
    Selected Answer:

    To stop air movement
    Correct Answer:
    Correct 
    To stop air movement through building walls and roof
    Response Feedback:[None Given]

  • Question 10

    Needs Grading
    Ungraded
    Why would a vapour barrier be laid on an earth crawlspace floor?
    Selected Answer:

    To eliminate gallons of water that could be generated from soil into the house air
    Correct Answer:
    Correct 
    To keep the moisture in the ground, instead of diffusing into the air and adding to the moisture levels in the crawlspace and house
    Response Feedback:[None Given]

  • Question 11

    0 out of 0 points
    Correct
    Should the vapour barrier be on the warm side or cold side of the wall assembly in a hot, humid climate?
    Selected Answer:
    Correct 
    warm side
    Answers:
    Correct 

    Response Feedback:
    Good work

  • Question 12

    0 out of 0 points
    Correct
    Should the vapour barrier be on the warm side or cold side of the wall assembly?
    Selected Answer:
    Correct 
    warm side
    Answers:
    Correct 

    Response Feedback:
    Good work

  • Question 13

    0 out of 0 points
    Correct
    Which is more important to be continuous?
    Selected Answer:
    Correct 
    air barrier
    Answers:
    Correct 

    Response Feedback:
    Good work
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