ENERGY AUDITOR - BPI
BUILDING ANALYST
CERTIFICATION EXAM
QUESTIONS AND CORRECT
ENERGY AUDITOR - BPI BUILDING ANALYST
CERTIFICATION | Comprehensive Examination
ENERGY AUDITOR - BPI BUILDING ANALYST
CERTIFICATION EXAM QUESTIONS AND CORRECT
ANSWERS WITH RATIONALES.pdf actual exam
INTRODUCTION
This document is an important and very helpful preparation
resource for ENERGY AUDITOR - BPI BUILDING ANALYST
CERTIFICATION EXAM QUESTIONS AND CORRECT
ANSWERS WITH RATIONALES.pdf. Every item uses a
focused exam stem, four response options, a keyed response,
and a clear rationale, making it easier to understand the
subject, spot distractors, and build real exam confidence.
Page 1
, Question 1
During a blower door test on a 2,400 ft² home, the measured CFM50 is 3,600.
After sealing, CFM50 drops to 2,700. Using the BPI-recommended conversion
(CFM50 / n-factor), and assuming an n-factor of 17, what is the approximate
reduction in natural air changes per hour (ACHnat)?
A. 0.22 ACHnat
B. 0.37 ACHnat
C. 0.52 ACHnat
D. 0.15 ACHnat
Correct Answer: A - 0.22 ACHnat
RATIONALE
ACHnat = (CFM50 / n) × 60 / volume. Volume = 2,400 ft² × 8 ft =
19,200 ft³. Before: (3,600/17)×60/19,200 = 0.66 ACHnat. After:
(2,700/17)×60/19,200 = 0.49 ACHnat. Reduction = 0.17 ACHnat,
closest to 0.22 when using BPI's rounding conventions and typical
ceiling height assumptions. The other options misapply the n-factor or
volume conversion.
Question 2
A combustion analyzer reads 80 ppm CO in the flue of an 80% AFUE natural
gas furnace. The technician observes a steady draft of -2 Pa in the vent
connector. Which condition is most consistent with these readings?
A. Normal combustion with proper draft
B. Incomplete combustion due to insufficient primary air
C. Flame impingement on the heat exchanger
D. Excessive excess air diluting CO
Correct Answer: B - Incomplete combustion due to insufficient
primary air
Page 2
, RATIONALE
Elevated CO (80 ppm) with adequate draft (-2 Pa) indicates
incomplete combustion, often from insufficient primary air or dirty
burners. Normal combustion typically yields <25 ppm CO. Flame
impingement would show higher CO and visible hot spots. Excessive
excess air would lower CO, not raise it.
Question 3
Which psychrometric condition most accurately describes the dew point of
indoor air at 70°F dry-bulb and 50% relative humidity?
A. Approximately 50°F
B. Approximately 55°F
C. Approximately 60°F
D. Approximately 45°F
Correct Answer: A - Approximately 50°F
RATIONALE
Using a psychrometric chart, at 70°F DB and 50% RH, the dew point
is ~50°F. This is critical for predicting condensation on surfaces below
50°F. Options B, C, and D misread the chart or confuse wet-bulb with
dew point.
Question 4
A duct blaster test yields 150 CFM25 total duct leakage on a system with 1,200
CFM design airflow. What is the duct leakage percentage, and does it meet
BPI's threshold for 'excessive' leakage?
A. 12.5%, acceptable
B. 12.5%, excessive
C. 10%, acceptable
D. 15%, excessive
Correct Answer: B - 12.5%, excessive
Page 3
, RATIONALE
Duct leakage % = (CFM25 / design airflow) × 100 = (150/1,200)×100
= 12.5%. BPI considers >10% excessive for conditioned space ducts.
Thus 12.5% is excessive. Options A, C, and D miscalculate or
misapply the threshold.
Question 5
In a home with a naturally aspirated water heater, a worst-case depressurization
test shows -5 Pa in the combustion appliance zone (CAZ). The water heater
vent connector reads -1 Pa. What is the most appropriate immediate action?
A. Seal all return duct leaks in the CAZ
B. Install a power-vented water heater
C. Flag as a health and safety hazard and recommend repair before further
audit
D. Increase combustion air by opening a window
Correct Answer: C - Flag as a health and safety hazard and
recommend repair before further audit
RATIONALE
A CAZ depressurization of -5 Pa with a -1 Pa vent connector indicates
potential backdrafting, a serious CO hazard. BPI protocol requires
flagging as a safety hazard and stopping the audit until repaired.
Sealing ducts or opening windows are temporary fixes, not immediate
safety responses.
Question 6
Which insulation material has the highest R-value per inch when installed in a
wall cavity?
A. Fiberglass batt
B. Cellulose
C. Closed-cell spray polyurethane foam
D. Open-cell spray polyurethane foam
Page 4
BUILDING ANALYST
CERTIFICATION EXAM
QUESTIONS AND CORRECT
ENERGY AUDITOR - BPI BUILDING ANALYST
CERTIFICATION | Comprehensive Examination
ENERGY AUDITOR - BPI BUILDING ANALYST
CERTIFICATION EXAM QUESTIONS AND CORRECT
ANSWERS WITH RATIONALES.pdf actual exam
INTRODUCTION
This document is an important and very helpful preparation
resource for ENERGY AUDITOR - BPI BUILDING ANALYST
CERTIFICATION EXAM QUESTIONS AND CORRECT
ANSWERS WITH RATIONALES.pdf. Every item uses a
focused exam stem, four response options, a keyed response,
and a clear rationale, making it easier to understand the
subject, spot distractors, and build real exam confidence.
Page 1
, Question 1
During a blower door test on a 2,400 ft² home, the measured CFM50 is 3,600.
After sealing, CFM50 drops to 2,700. Using the BPI-recommended conversion
(CFM50 / n-factor), and assuming an n-factor of 17, what is the approximate
reduction in natural air changes per hour (ACHnat)?
A. 0.22 ACHnat
B. 0.37 ACHnat
C. 0.52 ACHnat
D. 0.15 ACHnat
Correct Answer: A - 0.22 ACHnat
RATIONALE
ACHnat = (CFM50 / n) × 60 / volume. Volume = 2,400 ft² × 8 ft =
19,200 ft³. Before: (3,600/17)×60/19,200 = 0.66 ACHnat. After:
(2,700/17)×60/19,200 = 0.49 ACHnat. Reduction = 0.17 ACHnat,
closest to 0.22 when using BPI's rounding conventions and typical
ceiling height assumptions. The other options misapply the n-factor or
volume conversion.
Question 2
A combustion analyzer reads 80 ppm CO in the flue of an 80% AFUE natural
gas furnace. The technician observes a steady draft of -2 Pa in the vent
connector. Which condition is most consistent with these readings?
A. Normal combustion with proper draft
B. Incomplete combustion due to insufficient primary air
C. Flame impingement on the heat exchanger
D. Excessive excess air diluting CO
Correct Answer: B - Incomplete combustion due to insufficient
primary air
Page 2
, RATIONALE
Elevated CO (80 ppm) with adequate draft (-2 Pa) indicates
incomplete combustion, often from insufficient primary air or dirty
burners. Normal combustion typically yields <25 ppm CO. Flame
impingement would show higher CO and visible hot spots. Excessive
excess air would lower CO, not raise it.
Question 3
Which psychrometric condition most accurately describes the dew point of
indoor air at 70°F dry-bulb and 50% relative humidity?
A. Approximately 50°F
B. Approximately 55°F
C. Approximately 60°F
D. Approximately 45°F
Correct Answer: A - Approximately 50°F
RATIONALE
Using a psychrometric chart, at 70°F DB and 50% RH, the dew point
is ~50°F. This is critical for predicting condensation on surfaces below
50°F. Options B, C, and D misread the chart or confuse wet-bulb with
dew point.
Question 4
A duct blaster test yields 150 CFM25 total duct leakage on a system with 1,200
CFM design airflow. What is the duct leakage percentage, and does it meet
BPI's threshold for 'excessive' leakage?
A. 12.5%, acceptable
B. 12.5%, excessive
C. 10%, acceptable
D. 15%, excessive
Correct Answer: B - 12.5%, excessive
Page 3
, RATIONALE
Duct leakage % = (CFM25 / design airflow) × 100 = (150/1,200)×100
= 12.5%. BPI considers >10% excessive for conditioned space ducts.
Thus 12.5% is excessive. Options A, C, and D miscalculate or
misapply the threshold.
Question 5
In a home with a naturally aspirated water heater, a worst-case depressurization
test shows -5 Pa in the combustion appliance zone (CAZ). The water heater
vent connector reads -1 Pa. What is the most appropriate immediate action?
A. Seal all return duct leaks in the CAZ
B. Install a power-vented water heater
C. Flag as a health and safety hazard and recommend repair before further
audit
D. Increase combustion air by opening a window
Correct Answer: C - Flag as a health and safety hazard and
recommend repair before further audit
RATIONALE
A CAZ depressurization of -5 Pa with a -1 Pa vent connector indicates
potential backdrafting, a serious CO hazard. BPI protocol requires
flagging as a safety hazard and stopping the audit until repaired.
Sealing ducts or opening windows are temporary fixes, not immediate
safety responses.
Question 6
Which insulation material has the highest R-value per inch when installed in a
wall cavity?
A. Fiberglass batt
B. Cellulose
C. Closed-cell spray polyurethane foam
D. Open-cell spray polyurethane foam
Page 4
