BPI Health, Safety & Energy Efficiency 5

Question 1

What is the minimum whole-house mechanical ventilation rate for a 1,500 sq ft home with 3 occupants per ASHRAE 62.2-2016?

Accepted Answer

52.5 CFM

Answer

ASHRAE 62.2 formula: 0.01 × floor area + 7.5 × (occupants + 1) = 0.01×1500 + 7.5×4 = 15 + 30 + 7.5 = 52.5 CFM.

Question 2

Which combustion appliance configuration provides the highest level of safety against backdrafting?

Accepted Answer

Sealed combustion (direct vent) appliance

Answer

Sealed combustion appliances draw combustion air directly from outdoors and vent directly outside, completely isolating combustion from indoor air.

Question 3

What is the primary purpose of performing a duct leakage test in the context of health and safety?

Accepted Answer

To identify leaks that may draw combustion gases or attic pollutants into the living space

Answer

Duct leaks in unconditioned spaces can draw in soil gases, attic pollutants, or combustion byproducts and distribute them throughout the home.

Question 4

A home has a central exhaust-only ventilation system. What is a key disadvantage of this approach from an IAQ perspective?

Accepted Answer

It cannot control where make-up air enters, potentially drawing from unconditioned or contaminated spaces

Answer

Exhaust-only systems depressurize the home, and make-up air infiltrates through random leakage points that may introduce pollutants from crawl spaces or garages.

Question 5

Which test protocol should an analyst use to evaluate a gas appliance flue for CO at the point of highest measurement accuracy?

Accepted Answer

Insert a combustion analyzer probe into the flue breach above the draft diverter

Answer

Inserting the probe above the draft diverter or at the flue breach provides an undiluted sample of combustion gases for accurate CO measurement.

(BPI) Building Performance Institute Certified Practice Test

(BPI) Building Performance Institute Certified Practice Test

BPI Health, Safety & Energy Efficiency 5