HERS RATER EXAM ACTUAL QUESTIONS AND

HERS RATER EXAM (ACTUAL / ) QUESTIONS AND

VERIFIED CORRECT ANSWERS

If a building material has an R-value of 3.6 per inch and is installed to a thickness of 3 1/2 inches, what is the U-factor?R-value = 3.6 × 3.5 inches

= 12.6

U-factor = 1 / R-value

= 1 / 12.6

= 0.079

How much heat flows through that window if the interior temperature is 73°F and the outside temperature is 45°F?Q = U x A x ∆T Q = 0.43 x 15 x 28 Q = 181 Btu/hr

How much heat flows through that wall if the interior temperature is 70°F and the outside temperature is 34°F?Q = U x A x ∆T Q = 0.0578 x 105 x 36 1 / 3

Q = 218 Btu/hr

What are the 3 types of heat transfer?Convective, conductive, and radiant

Your significant other is standing next to a north facing window on a cold winter night, bitterly complaining about catching a chill. What type of heat transfer is occurring?Radiation

Homes are heated or cooled by what types of heat transfer?Give examples.Convection (forced air systems), Radiation (radiant floors)

What is the 2nd Law of Thermodynamics?Systems in contact with each other that have differences tend to balance. Air, heat, and water move from areas of high concentration to areas of less concentration (high pressure to low pressure, hot to cold, wet to dry).

What are the elements of a construction drawing? 2 / 3

The elements of a drawing are lines, dimensions, symbols, and notes.

Describe a "Section View" A sectional view is like looking at a slice of the house. It shows the details of the construction as well as the relationships between floors/ceilings and header heights

Which view shows horizontal dimensions?Plan view

Which view shows vertical dimensions?Elevation view

Which view would indicate the insulation levels?Section View

Why are overhang dimensions important?To determine the amount of solar shading over the windows

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