NABCEP Energy Efficiency & Conservation Techniques 2

Question 1

What does the term 'building envelope' refer to in energy efficiency?

Accepted Answer

The physical barrier between conditioned and unconditioned spaces

Answer

The building envelope includes walls, roofs, floors, windows, and doors that separate interior conditioned space from the exterior environment.

Question 2

Which insulation metric indicates resistance to heat flow per unit area?

Accepted Answer

R-value

Answer

R-value measures thermal resistance; higher R-values indicate better insulating performance and reduced heat transfer.

Question 3

A blower door test is used primarily to measure:

Accepted Answer

Overall building air infiltration rate

Answer

A blower door depressurizes the building and measures how much air leaks in, quantifying overall envelope airtightness.

Question 4

In climate zones with hot summers and mild winters, which strategy provides the greatest cooling energy savings?

Accepted Answer

Increasing roof reflectance with a cool roof

Answer

Cool roofs with high solar reflectance reduce heat gain through the roof, directly lowering cooling loads in hot climates.

Question 5

The Energy Use Intensity (EUI) of a building is expressed as:

Accepted Answer

BTU per square foot per year

Answer

EUI normalizes a building's total energy consumption by its floor area, typically expressed as kBtu per square foot per year.

(NABCEP) Certified North American Board of Certified Energy Practitioners Specialist Practice Test