## Questions Only

1.) A given section of attic is 5’ high and extends out 12’ long. How long is the roof covering this attic section?

A. 11’

B. 13’

C. 15’

D. not enough information

2.) As a match is lit, _______ energy is converted into thermal energy.

A. kinetic

B. potential

C. sitting

D. catalytic

3.) Which part of the building shell is most likely to be affected by seepage?

A. foundation

B. door headers

C. windows

D. roof

4.) Match the heating/cooling appliance with the units typically used to measure efficiency of each appliance type:

A. oil furnace – AFUE, gas boiler – AFUE, air conditioning – SEER, heat pump – COP, electric DHW – EF

B. oil furnace – SSE, gas boiler – AFUE, air conditioning – EER, heat pump – COP, electric DHW – EF

C. oil furnace – COP, gas boiler – COP, air conditioning – SEER, heat pump – COP, electric DHW – SEER

D. oil furnace – EF, gas boiler – EF, air conditioning – SEER, heat pump – COP, electric DHW – AFUE

5.) The R values of wall assembly components are .17, 1.3, .94, 13, .56, and .67. What is the U-value?

A. -16.67

B. .06

C. .61

D. 16.67

6.) Given the following data, what is the minimum building airflow standard?

conditioned area: 2000 sf (with consistent 10’ ceilings)

# of occupants: 4

# of stories above grade: 2.5

climate zone: 2 (n-factor 18)

A. 117 cfm_{50}

B. 1596 cfm_{50}

C. 1996 cfm_{50 }

D. 2100 cfm_{50}

7.) You calculate a building’s BAS to be 2500 cfm_{50} and after airsealing, you measure the home’s air leakage at 1700 cfm_{50}? Which of the following should you do?

A. start punching holes in your caulk and foam until you are back up to the BAS

B. recommend that the customer install enough mechanical ventilation to make up the difference, in this case 800 cfm_{50 }

C. require that the customer install enough mechanical ventilation to make up the difference, in this case 800 cfm_{50}

D. require that the customer install mechanical ventilation to provide100% of the ventilation requirements

## Questions with Answers

1.) A given section of attic is 5’ high and extends out 12’ long. How long is the roof covering this attic section?

A. 11’

**B. 13’ – this is a question testing your knowledge of the Pythagorean theorem, which says that the square of a triangle’s hypotenuse (longest side) equals the sum of the squares of the two shortest sides (c**^{2}** = a**^{2}** + b**^{2}**). If you’re rusty on this formula, it might be helpful to review it by trying out another “perfect” triangle – if the two short sides of a triangle are 3 and 4, what is the hypotenuse? **

C. 15’

D. not enough information

2.) As a match is lit, _______ energy is converted into thermal energy.

A. kinetic

**B. potential – you can think of potential energy as energy that is being stored and has not yet been set into motion – ****kinetic**** energy.**

C. sitting

D. catalytic

3.) Which part of the building shell is most likely to be affected by seepage?

**A. foundation – “seepage” normally refers to moisture transfer through ****soil****, and the foundation is the only component of these that should be touching soil!**

B. door headers

C. windows

D. roof

4.) Match the heating/cooling appliance with the units typically used to measure efficiency of each appliance type:

**A. oil furnace – AFUE, gas boiler – AFUE, air conditioning – SEER, heat pump – COP, electric DHW – EF – you don’t need to know exactly how all of these are computed (with the exception of AFUE), but you should be able to match the efficiency rating with the appliance. If you can’t, start by doing some research on the efficiency of your own heating/cooling units! **

B. oil furnace – SSE, gas boiler – AFUE, air conditioning – EER, heat pump – COP, electric DHW – EF

C. oil furnace – COP, gas boiler – COP, air conditioning – SEER, heat pump – COP, electric DHW – SEER

D. oil furnace – EF, gas boiler – EF, air conditioning – SEER, heat pump – COP, electric DHW – AFUE

5.) The R values of wall assembly components are .17, 1.3, .94, 13, .56, and .67. What is the U-value?

A. -16.67

**B. .06 – this question is not as challenging as it looks when you recall that the U-value is the inverse of the total R-value. Simply add all the components to get 16.67, then divide 1 by your result to get the inverse: 1/16.67 = .0599. Or, you could even take the advanced route and save yourself some time by looking at the answer choices and realizing that B. is the only answer that makes sense as the inverse of the R-value of a total wall assembly.**

C. .61

D. 16.67

6.) Given the following data, what is the minimum building airflow standard?

conditioned area: 2000 sf (with consistent 10’ ceilings)

# of occupants: 4

# of stories above grade: 2.5

climate zone: 2 (n-factor 18)

A. 117 cfm_{50} – perhaps you forgot to multiply by the n-factor ?

**B. 1596 cfm**_{50}** – the building has 20,000 cubic feet (2,000 sf x 10’ high), so the ventilation required for the building is .35 x (20,000 / 60) = 116.67 cfm, which exceeds the ventilation required for people (15 x 4 = 60 cfm). Using the 2.5-story height correction factor, the modified n-factor becomes n = 18 x .76 = 13.68. The minimum cfm**_{50}** will be the product of the minimum ventilation required and the modified n-factor: 116.67 cfm x 13.68 = 1596 cfm**_{50}**. To answer this question correctly, you’ll need to use pp. 4 and 5 of the Standards. And make sure you understand this question type, as it will almost certainly be on the test in some form or another! **

C. 1996 cfm_{50 }**–**

D. 2100 cfm_{50} – perhaps you forgot to use the height correction factor?

7.) You calculate a building’s BAS to be 2500 cfm_{50} and after airsealing, you measure the home’s air leakage at 1700 cfm_{50}? Which of the following should you do?

A. start punching holes in your caulk and foam until you are back up to the BAS

B. recommend that the customer install enough mechanical ventilation to make up the difference, in this case 800 cfm_{50 }

C. require that the customer install enough mechanical ventilation to make up the difference, in this case 800 cfm_{50}

**D. require that the customer install mechanical ventilation to provide100% of the ventilation requirements – the key here is to remember (or read on the p. 6 of the BA Standards) that the threshold is 70% of BAS, or in this case, 1750 cfm**_{50-. }** Above this threshold, you have to recommend enough mechanical ventilation to make up the difference; below this threshold; below this threshold, you have to install ****100%**** of the ventilation requirements with mechanical ventilation**