BAP Building Envelope & Insulation 3

Question 1

Which diagnostic test is the standard method for measuring the airtightness of a building envelope during a home energy assessment?

Accepted Answer

Blower door test

Answer

A blower door test uses a calibrated fan installed in an exterior door opening to pressurize or depressurize the building, enabling quantification of total air leakage through the envelope.

Question 2

What is the neutral pressure plane (NPP) in a building?

Accepted Answer

The elevation where indoor and outdoor air pressures are equal due to the stack effect

Answer

The NPP is the height in a building where indoor and outdoor pressures are equal — with positive pressure and exfiltration above it, and negative pressure with infiltration below due to buoyancy.

Question 3

What is the primary mechanism by which a radiant barrier in an attic reduces cooling loads?

Accepted Answer

It reflects radiant heat emitted by the hot roof deck, reducing heat transfer to attic insulation

Answer

A radiant barrier reflects long-wave radiation emitted by the hot roof deck back toward the roof, reducing the radiant heat transferred to the attic floor insulation and the conditioned space below.

Question 4

For an unvented cathedral ceiling assembly, which insulation strategy is most appropriate to prevent condensation at the roof deck?

Accepted Answer

Air-impermeable insulation (spray foam) applied directly to the underside of the roof deck

Answer

In an unvented cathedral ceiling, air-impermeable insulation at the roof deck keeps the deck warm and above the dew point, preventing condensation without requiring a ventilation channel.

Question 5

What is interstitial condensation in a building assembly?

Accepted Answer

Condensation forming within the layers of a wall, roof, or floor assembly

Answer

Interstitial condensation occurs when moisture vapor migrating through a building assembly reaches a layer at or below the dew point temperature and changes phase from vapor to liquid within the assembly.

(BAP) Building Analyst Professional Practice Test

(BAP) Building Analyst Professional Practice Test

BAP Building Envelope & Insulation 3