TEXAS HVAC ENERGY AUDITOR
CERTIFICATION EXAM WITH ACTUAL
QUESTIONS AND VERIFIED ANSWERS,
PLUS EXPLAINED RATIONALES/EXPERT
VERIFIED FOR GUARANTEED 100% PASS
2026/LATEST UPDATE/INSTANT
DOWNLOAD PDF
1. During a comprehensive residential HVAC energy audit in Texas,
which diagnostic sequence best ensures that combustion safety is
maintained before conducting whole-house depressurization tests?
A. Conduct blower door testing, then combustion appliance zone (CAZ)
testing, then draft testing
B. Inspect insulation, then infrared scanning, then combustion testing
C. Test for gas leaks, perform combustion safety and draft testing, then
blower door depressurization
D. Perform duct leakage testing first, then combustion efficiency testing
Answer: C
Rationale: Combustion appliances must be evaluated before
depressurizing the home because blower door operation may backdraft
naturally vented combustion appliances, introducing carbon monoxide
into occupied spaces. Safe auditing protocols always prioritize
combustion safety before induced pressure diagnostics.
2. Which building component typically contributes the greatest
uncontrolled air leakage in older Texas homes?
A. Double-pane windows
B. Ceiling penetrations into attics
C. Interior drywall partitions
D. Hardwood flooring
1
,Answer: B
Rationale: Ceiling penetrations surrounding recessed lights, plumbing
vents, electrical wiring, attic hatches, and dropped soffits commonly
represent the largest leakage pathways due to stack effect and poor air
sealing.
3. A blower door test measures:
A. Refrigerant superheat
B. Building envelope airtightness
C. Furnace combustion efficiency
D. Electrical load factor
Answer: B
Rationale: A blower door depressurizes or pressurizes a building to
quantify envelope leakage, commonly expressed as CFM50 and
ACH50.
4. The standard pressure difference used during blower door testing
is:
A. 5 Pascals
B. 25 Pascals
C. 50 Pascals
D. 100 Pascals
Answer: C
Rationale: Fifty Pascals is the internationally recognized testing
pressure because it provides consistent comparisons among buildings
regardless of weather conditions.
5. Excessive duct leakage located outside the conditioned envelope
primarily causes:
2
,A. Increased insulation value
B. Reduced thermostat accuracy
C. Higher heating and cooling loads
D. Increased refrigerant charge
Answer: C
Rationale: Leaky ducts in attics or crawlspaces lose conditioned air
and draw unconditioned air into the HVAC system, significantly
increasing system runtime and energy consumption.
6. What instrument measures pressure differences during duct and
blower door testing?
A. Sling psychrometer
B. Digital manometer
C. Clamp ammeter
D. Hygrometer
Answer: B
Rationale: Digital manometers accurately measure pressure
differences in Pascals, allowing auditors to diagnose leakage, pressure
imbalances, and airflow issues.
7. The stack effect is strongest during:
A. Mild spring weather
B. Periods with large indoor-outdoor temperature differences
C. Rainstorms only
D. High humidity only
Answer: B
3
, Rationale: Larger temperature differences increase buoyancy forces,
causing warm indoor air to rise and escape through upper leaks while
drawing outdoor air into lower portions of the building.
8. A home's ACH50 value represents:
A. Air changes per hour under natural conditions
B. Air changes per hour at 50 Pascals
C. Furnace airflow
D. Supply duct velocity
Answer: B
Rationale: ACH50 standardizes air leakage measurements by
expressing building leakage as equivalent air changes per hour under
a 50 Pascal pressure differential.
9. During infrared thermography, missing insulation generally
appears as:
A. Uniform surface temperatures
B. Thermal anomalies differing from surrounding areas
C. High humidity readings
D. Electrical interference
Answer: B
Rationale: Areas lacking insulation transfer heat differently, creating
temperature contrasts visible on infrared cameras under appropriate
testing conditions.
10. Which HVAC system component most directly controls
latent cooling?
A. Condenser fan
4
CERTIFICATION EXAM WITH ACTUAL
QUESTIONS AND VERIFIED ANSWERS,
PLUS EXPLAINED RATIONALES/EXPERT
VERIFIED FOR GUARANTEED 100% PASS
2026/LATEST UPDATE/INSTANT
DOWNLOAD PDF
1. During a comprehensive residential HVAC energy audit in Texas,
which diagnostic sequence best ensures that combustion safety is
maintained before conducting whole-house depressurization tests?
A. Conduct blower door testing, then combustion appliance zone (CAZ)
testing, then draft testing
B. Inspect insulation, then infrared scanning, then combustion testing
C. Test for gas leaks, perform combustion safety and draft testing, then
blower door depressurization
D. Perform duct leakage testing first, then combustion efficiency testing
Answer: C
Rationale: Combustion appliances must be evaluated before
depressurizing the home because blower door operation may backdraft
naturally vented combustion appliances, introducing carbon monoxide
into occupied spaces. Safe auditing protocols always prioritize
combustion safety before induced pressure diagnostics.
2. Which building component typically contributes the greatest
uncontrolled air leakage in older Texas homes?
A. Double-pane windows
B. Ceiling penetrations into attics
C. Interior drywall partitions
D. Hardwood flooring
1
,Answer: B
Rationale: Ceiling penetrations surrounding recessed lights, plumbing
vents, electrical wiring, attic hatches, and dropped soffits commonly
represent the largest leakage pathways due to stack effect and poor air
sealing.
3. A blower door test measures:
A. Refrigerant superheat
B. Building envelope airtightness
C. Furnace combustion efficiency
D. Electrical load factor
Answer: B
Rationale: A blower door depressurizes or pressurizes a building to
quantify envelope leakage, commonly expressed as CFM50 and
ACH50.
4. The standard pressure difference used during blower door testing
is:
A. 5 Pascals
B. 25 Pascals
C. 50 Pascals
D. 100 Pascals
Answer: C
Rationale: Fifty Pascals is the internationally recognized testing
pressure because it provides consistent comparisons among buildings
regardless of weather conditions.
5. Excessive duct leakage located outside the conditioned envelope
primarily causes:
2
,A. Increased insulation value
B. Reduced thermostat accuracy
C. Higher heating and cooling loads
D. Increased refrigerant charge
Answer: C
Rationale: Leaky ducts in attics or crawlspaces lose conditioned air
and draw unconditioned air into the HVAC system, significantly
increasing system runtime and energy consumption.
6. What instrument measures pressure differences during duct and
blower door testing?
A. Sling psychrometer
B. Digital manometer
C. Clamp ammeter
D. Hygrometer
Answer: B
Rationale: Digital manometers accurately measure pressure
differences in Pascals, allowing auditors to diagnose leakage, pressure
imbalances, and airflow issues.
7. The stack effect is strongest during:
A. Mild spring weather
B. Periods with large indoor-outdoor temperature differences
C. Rainstorms only
D. High humidity only
Answer: B
3
, Rationale: Larger temperature differences increase buoyancy forces,
causing warm indoor air to rise and escape through upper leaks while
drawing outdoor air into lower portions of the building.
8. A home's ACH50 value represents:
A. Air changes per hour under natural conditions
B. Air changes per hour at 50 Pascals
C. Furnace airflow
D. Supply duct velocity
Answer: B
Rationale: ACH50 standardizes air leakage measurements by
expressing building leakage as equivalent air changes per hour under
a 50 Pascal pressure differential.
9. During infrared thermography, missing insulation generally
appears as:
A. Uniform surface temperatures
B. Thermal anomalies differing from surrounding areas
C. High humidity readings
D. Electrical interference
Answer: B
Rationale: Areas lacking insulation transfer heat differently, creating
temperature contrasts visible on infrared cameras under appropriate
testing conditions.
10. Which HVAC system component most directly controls
latent cooling?
A. Condenser fan
4
