Wisconsin Energy Conservation Inspector Exam Practice
Questions And Correct Answers (Veri
This exam assesses mastery of Wisconsin energy conservation codes, building envelope diagnostics, HVAC
efficiency, blower door and duct leakage testing, combustion safety, and renewable energy integration for
residential and commercial inspections. It contains 149 multiple-choice questions, each with four distractors and
a fully worked rationale that explains why the keyed answer is correct. Questions are organized into clearly
labelled sections that mirror the major content areas of the course. Targeted learning outcomes include: Interpret
Wisconsin Uniform Dwelling Code and IECC provisions for insulation, air sealing, and ventilation.; Perform and
analyze blower door, duct leakage, and thermal imaging diagnostics to identify energy losses.; Evaluate HVAC
system efficiency, combustion safety, and indoor air quality compliance.. Every item has been reviewed for
clinical accuracy, current guidelines, and clarity so that students can study with confidence and self-correct as
they work through the bank. Use it as a high-yield review immediately before the exam, or as a structured practice
tool during the unit - the rationales double as concise teaching notes. The recommended writing time is 2.5 hours,
with a passing score of 75%. Aligned with Aligned with US university assessment standards and Wisconsin
Department of Safety and Professional Services certification requirements. standards and reflects the question
style commonly seen on accredited program examinations. Students consistently achieving above the cut score on
this bank have historically gone on to earn A+ on the corresponding course exam. Read every stem carefully -
Section 1: General (Questions 1-149)
1 During a blower door test on a 2,400 ft² Wisconsin home, the measured air
leakage is 1,800 CFM at 50 Pa. The home has a volume of 19,200 ft³ and a
ceiling height of 8 ft. What is the air changes per hour at 50 Pa (ACH50), and
does it meet the 2015 IECC threshold for a climate zone 6 home?
A) 5.6 ACH50; meets the 3 ACH50 threshold
B) 5.6 ACH50; does not meet the 3 ACH50 threshold
C) 3.0 ACH50; meets the 3 ACH50 threshold
D) 7.5 ACH50; does not meet the 3 ACH50 threshold
Answer: B
Rationale: ACH50 = (CFM50 × 60) / volume = (1,800 × 60) / 19,200 = 5.625 "H 5.6.
The 2015 IECC requires 3 ACH50 for climate zone 6, so it fails. Distractors A and
C misapply the formula or threshold; D uses incorrect volume.
2 A Wisconsin inspector finds a forced-air furnace with a steady-state efficiency of
80% AFUE. The homeowner wants to reduce energy costs. Which upgrade
provides the greatest seasonal energy savings while maintaining compliance with
current Wisconsin energy codes?
A) Replace with a 95% AFUE condensing furnace
B) Add a programmable thermostat
C) Seal duct leaks in unconditioned attic
D) Install a high-efficiency ECM blower motor
,Answer: A
Rationale: Upgrading from 80% to 95% AFUE reduces fuel use by ~16%, the largest
single measure. Duct sealing and ECM motors offer smaller savings; thermostats
save less in Wisconsin's cold climate. Code compliance favors condensing furnaces.
3 Which of the following best explains why a Wisconsin home with R-49 attic
insulation and R-20 basement walls may still fail a blower door test despite
meeting prescriptive insulation requirements?
A) Insulation R-value is irrelevant to air leakage.
B) Thermal bypasses and unsealed penetrations allow air infiltration independent
of insulation.
C) Blower door tests only measure duct leakage, not envelope leakage.
D) R-49 is insufficient for climate zone 6.
Answer: B
Rationale: Insulation resists conductive heat flow, not air movement. Thermal
bypasses (e.g., top plates, recessed lights, plumbing chases) cause infiltration that
blower doors detect. A is false; C misstates blower door function; D is incorrect as
R-49 meets code.
4 An inspector uses a duct blaster to test a forced-air system. The measured duct
leakage is 150 CFM25 to outside. The system airflow is 1,200 CFM. What is the
leakage percentage, and what does it indicate?
A) 12.5%; acceptable for Wisconsin homes
B) 12.5%; exceeds the 10% threshold for high-performance homes
C) 8.0%; meets all standards
D) 15.0%; requires immediate sealing
Answer: B
Rationale: Duct leakage % = (,200) × 100 = 12.5%. Wisconsin's Focus on
Energy and IECC often target 10% for high-performance. A and C miscalculate; D
is wrong because 150/1200=12.5%, not 15%.
5 During a combustion safety test, a natural gas water heater in a tight Wisconsin
home shows 150 ppm CO in undiluted flue gases and 12 Pa depressurization.
What is the most appropriate immediate action?
A) Adjust the thermostat to lower water temperature
B) Shut off the appliance and ventilate the space
C) Seal additional air leaks to reduce depressurization
D) Recommend a CO alarm and schedule follow-up
,Answer: B
Rationale: CO >100 ppm and depressurization >5 Pa indicate spillage and health
risk. Immediate shutdown and ventilation are required. A, C, and D do not address
the acute hazard; sealing leaks worsens depressurization.
6 A Wisconsin inspector evaluates a home with a ground-source heat pump. The
system has a COP of 3.5 at 32°F and an EER of 14.5. Which statement correctly
compares its efficiency to a 95% AFUE furnace?
A) The heat pump is less efficient because COP < 4.0
B) The heat pump delivers 3.5 units of heat per unit electricity, outperforming the
furnace's 0.95
C) EER measures heating efficiency, so 14.5 is superior
D) Both systems have equivalent efficiency in Wisconsin winters
Answer: B
Rationale: COP of 3.5 means 350% efficiency versus 95% for the furnace. EER
measures cooling, not heating. A misinterprets COP; C confuses EER; D ignores
heat pump performance drop in extreme cold.
7 Which building envelope assembly is most vulnerable to moisture condensation in
a Wisconsin climate zone 6 home during winter?
A) Exterior rigid foam with taped seams
B) Interior polyethylene vapor barrier with fiberglass batts
C) Closed-cell spray foam in the rim joist
D) Vented attic with cellulose insulation
Answer: B
Rationale: Interior vapor barriers can trap moisture, leading to condensation on cold
sheathing in winter. Exterior foam, spray foam, and vented attics manage moisture
better. A, C, and D are less prone to condensation issues.
8 An inspector reviews a home's energy use and finds a high heating load but low
insulation levels. The homeowner asks about the most cost-effective
improvement. Which metric best guides this decision?
A) Simple payback period
B) Return on investment (ROI)
C) Levelized cost of energy (LCOE)
D) Net present value (NPV)
Answer: A
Rationale: Simple payback is commonly used for quick comparison of energy
, upgrades. ROI, LCOE, and NPV are more complex and less intuitive for
homeowners. Payback directly shows time to recoup costs.
9 Which of the following is a required element of a Wisconsin energy conservation
inspection report under the Uniform Dwelling Code?
A) Blower door test results
B) Duct leakage test results
C) Insulation R-values and air sealing details
D) Solar panel efficiency ratings
Answer: C
Rationale: The UDC requires documentation of insulation and air sealing. Blower
door and duct leakage tests may be optional or required by program, not code. Solar
ratings are irrelevant to UDC.
10 A Wisconsin inspector is evaluating a home with a HRV system. The system
provides 100 CFM exhaust and 90 CFM supply. What is the net imbalance, and
what is the likely consequence?
A) 10 CFM; slight positive pressure, reducing infiltration
B) 10 CFM; slight negative pressure, increasing infiltration
C) 190 CFM; balanced ventilation
D) 90 CFM; excessive supply
Answer: B
Rationale: Net imbalance = 100 - 90 = 10 CFM exhaust dominant, causing negative
pressure and increased infiltration. A reverses pressure; C adds flows incorrectly; D
misinterprets supply.
11 A Wisconsin single-family home has an attic with R-19 blown fiberglass
insulation over a vented unconditioned space. The inspector measures 8 inches of
settled depth, though the label specifies R-3.2 per inch at 3.5 inches. Which
conclusion best reflects correct field assessment?
A) Settled depth confirms R-25.6, exceeding code minimum for Zone 6.
B) Settled depth indicates R-25.6 nominal, but settled density reduces actual
R-value below R-19.
C) R-value is independent of settled depth once installed; label governs
compliance.
D) The attic insulation must be removed because fiberglass settles only in walls,
not attics.
Answer: B
Questions And Correct Answers (Veri
This exam assesses mastery of Wisconsin energy conservation codes, building envelope diagnostics, HVAC
efficiency, blower door and duct leakage testing, combustion safety, and renewable energy integration for
residential and commercial inspections. It contains 149 multiple-choice questions, each with four distractors and
a fully worked rationale that explains why the keyed answer is correct. Questions are organized into clearly
labelled sections that mirror the major content areas of the course. Targeted learning outcomes include: Interpret
Wisconsin Uniform Dwelling Code and IECC provisions for insulation, air sealing, and ventilation.; Perform and
analyze blower door, duct leakage, and thermal imaging diagnostics to identify energy losses.; Evaluate HVAC
system efficiency, combustion safety, and indoor air quality compliance.. Every item has been reviewed for
clinical accuracy, current guidelines, and clarity so that students can study with confidence and self-correct as
they work through the bank. Use it as a high-yield review immediately before the exam, or as a structured practice
tool during the unit - the rationales double as concise teaching notes. The recommended writing time is 2.5 hours,
with a passing score of 75%. Aligned with Aligned with US university assessment standards and Wisconsin
Department of Safety and Professional Services certification requirements. standards and reflects the question
style commonly seen on accredited program examinations. Students consistently achieving above the cut score on
this bank have historically gone on to earn A+ on the corresponding course exam. Read every stem carefully -
Section 1: General (Questions 1-149)
1 During a blower door test on a 2,400 ft² Wisconsin home, the measured air
leakage is 1,800 CFM at 50 Pa. The home has a volume of 19,200 ft³ and a
ceiling height of 8 ft. What is the air changes per hour at 50 Pa (ACH50), and
does it meet the 2015 IECC threshold for a climate zone 6 home?
A) 5.6 ACH50; meets the 3 ACH50 threshold
B) 5.6 ACH50; does not meet the 3 ACH50 threshold
C) 3.0 ACH50; meets the 3 ACH50 threshold
D) 7.5 ACH50; does not meet the 3 ACH50 threshold
Answer: B
Rationale: ACH50 = (CFM50 × 60) / volume = (1,800 × 60) / 19,200 = 5.625 "H 5.6.
The 2015 IECC requires 3 ACH50 for climate zone 6, so it fails. Distractors A and
C misapply the formula or threshold; D uses incorrect volume.
2 A Wisconsin inspector finds a forced-air furnace with a steady-state efficiency of
80% AFUE. The homeowner wants to reduce energy costs. Which upgrade
provides the greatest seasonal energy savings while maintaining compliance with
current Wisconsin energy codes?
A) Replace with a 95% AFUE condensing furnace
B) Add a programmable thermostat
C) Seal duct leaks in unconditioned attic
D) Install a high-efficiency ECM blower motor
,Answer: A
Rationale: Upgrading from 80% to 95% AFUE reduces fuel use by ~16%, the largest
single measure. Duct sealing and ECM motors offer smaller savings; thermostats
save less in Wisconsin's cold climate. Code compliance favors condensing furnaces.
3 Which of the following best explains why a Wisconsin home with R-49 attic
insulation and R-20 basement walls may still fail a blower door test despite
meeting prescriptive insulation requirements?
A) Insulation R-value is irrelevant to air leakage.
B) Thermal bypasses and unsealed penetrations allow air infiltration independent
of insulation.
C) Blower door tests only measure duct leakage, not envelope leakage.
D) R-49 is insufficient for climate zone 6.
Answer: B
Rationale: Insulation resists conductive heat flow, not air movement. Thermal
bypasses (e.g., top plates, recessed lights, plumbing chases) cause infiltration that
blower doors detect. A is false; C misstates blower door function; D is incorrect as
R-49 meets code.
4 An inspector uses a duct blaster to test a forced-air system. The measured duct
leakage is 150 CFM25 to outside. The system airflow is 1,200 CFM. What is the
leakage percentage, and what does it indicate?
A) 12.5%; acceptable for Wisconsin homes
B) 12.5%; exceeds the 10% threshold for high-performance homes
C) 8.0%; meets all standards
D) 15.0%; requires immediate sealing
Answer: B
Rationale: Duct leakage % = (,200) × 100 = 12.5%. Wisconsin's Focus on
Energy and IECC often target 10% for high-performance. A and C miscalculate; D
is wrong because 150/1200=12.5%, not 15%.
5 During a combustion safety test, a natural gas water heater in a tight Wisconsin
home shows 150 ppm CO in undiluted flue gases and 12 Pa depressurization.
What is the most appropriate immediate action?
A) Adjust the thermostat to lower water temperature
B) Shut off the appliance and ventilate the space
C) Seal additional air leaks to reduce depressurization
D) Recommend a CO alarm and schedule follow-up
,Answer: B
Rationale: CO >100 ppm and depressurization >5 Pa indicate spillage and health
risk. Immediate shutdown and ventilation are required. A, C, and D do not address
the acute hazard; sealing leaks worsens depressurization.
6 A Wisconsin inspector evaluates a home with a ground-source heat pump. The
system has a COP of 3.5 at 32°F and an EER of 14.5. Which statement correctly
compares its efficiency to a 95% AFUE furnace?
A) The heat pump is less efficient because COP < 4.0
B) The heat pump delivers 3.5 units of heat per unit electricity, outperforming the
furnace's 0.95
C) EER measures heating efficiency, so 14.5 is superior
D) Both systems have equivalent efficiency in Wisconsin winters
Answer: B
Rationale: COP of 3.5 means 350% efficiency versus 95% for the furnace. EER
measures cooling, not heating. A misinterprets COP; C confuses EER; D ignores
heat pump performance drop in extreme cold.
7 Which building envelope assembly is most vulnerable to moisture condensation in
a Wisconsin climate zone 6 home during winter?
A) Exterior rigid foam with taped seams
B) Interior polyethylene vapor barrier with fiberglass batts
C) Closed-cell spray foam in the rim joist
D) Vented attic with cellulose insulation
Answer: B
Rationale: Interior vapor barriers can trap moisture, leading to condensation on cold
sheathing in winter. Exterior foam, spray foam, and vented attics manage moisture
better. A, C, and D are less prone to condensation issues.
8 An inspector reviews a home's energy use and finds a high heating load but low
insulation levels. The homeowner asks about the most cost-effective
improvement. Which metric best guides this decision?
A) Simple payback period
B) Return on investment (ROI)
C) Levelized cost of energy (LCOE)
D) Net present value (NPV)
Answer: A
Rationale: Simple payback is commonly used for quick comparison of energy
, upgrades. ROI, LCOE, and NPV are more complex and less intuitive for
homeowners. Payback directly shows time to recoup costs.
9 Which of the following is a required element of a Wisconsin energy conservation
inspection report under the Uniform Dwelling Code?
A) Blower door test results
B) Duct leakage test results
C) Insulation R-values and air sealing details
D) Solar panel efficiency ratings
Answer: C
Rationale: The UDC requires documentation of insulation and air sealing. Blower
door and duct leakage tests may be optional or required by program, not code. Solar
ratings are irrelevant to UDC.
10 A Wisconsin inspector is evaluating a home with a HRV system. The system
provides 100 CFM exhaust and 90 CFM supply. What is the net imbalance, and
what is the likely consequence?
A) 10 CFM; slight positive pressure, reducing infiltration
B) 10 CFM; slight negative pressure, increasing infiltration
C) 190 CFM; balanced ventilation
D) 90 CFM; excessive supply
Answer: B
Rationale: Net imbalance = 100 - 90 = 10 CFM exhaust dominant, causing negative
pressure and increased infiltration. A reverses pressure; C adds flows incorrectly; D
misinterprets supply.
11 A Wisconsin single-family home has an attic with R-19 blown fiberglass
insulation over a vented unconditioned space. The inspector measures 8 inches of
settled depth, though the label specifies R-3.2 per inch at 3.5 inches. Which
conclusion best reflects correct field assessment?
A) Settled depth confirms R-25.6, exceeding code minimum for Zone 6.
B) Settled depth indicates R-25.6 nominal, but settled density reduces actual
R-value below R-19.
C) R-value is independent of settled depth once installed; label governs
compliance.
D) The attic insulation must be removed because fiberglass settles only in walls,
not attics.
Answer: B
