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HVAC Journeyman Actual Exam 2026/2027:
100% Verified Complete Questions and Answers |
Graded A+ for HVAC Licensing Success – Pass
Guaranteed - A+ Graded
Aligned with EPA Section 608, ASHRAE Standards, ACCA Manuals (J, S, D), and 2026/2027
IMC Updates
SECTION 1: HVAC THEORY & FUNDAMENTALS (12 Questions)
Q1: A technician measures the wet-bulb and dry-bulb temperatures of air entering an evaporator
coil. The purpose of determining these values is to calculate:
A. Refrigerant superheat only
B. Refrigerant subcooling only
C. Total heat content (enthalpy) of the air and system capacity
D. Compressor amp draw
Correct Answer: C
Rationale: Wet-bulb and dry-bulb temperatures allow calculation of enthalpy (total heat content)
using the psychrometric chart. This determines system capacity (BTUH = CFM × 4.5 × Δh) and
confirms proper dehumidification. Options A and B are refrigerant-side measurements. Option D
is electrical measurement. Psychrometrics is fundamental to proper system sizing and diagnosis
per ASHRAE Fundamentals.
Q2: According to the Second Law of Thermodynamics, heat energy naturally flows:
A. From cold objects to hot objects with external work
B. From hot objects to cold objects without external work
C. Equally in both directions simultaneously
D. Only through radiation, not conduction or convection
Correct Answer: B
Rationale: The Second Law states heat flows spontaneously from higher temperature to lower
temperature. External work (compressor) is required to move heat "uphill" (cold to hot) in
refrigeration cycles. Option A describes refrigeration with work input. Option C violates
thermodynamic principles. Option D incorrectly limits heat transfer modes. Understanding
thermodynamic laws explains why heat pumps require energy input.
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Q3: Sensible heat is defined as heat that:
A. Causes a change of state (latent heat)
B. Can be measured with a thermometer and causes temperature change
C. Is stored in refrigerant only
D. Cannot be calculated or measured
Correct Answer: B
Rationale: Sensible heat causes temperature change measurable with a thermometer (Q = m × c
× ΔT). Latent heat (Option A) causes phase change at constant temperature. Options C and D are
incorrect—sensible heat applies to all substances and is readily calculated. Distinguishing
sensible/latent heat is essential for load calculations (Manual J) and equipment selection.
Q4: A system has 400 CFM per ton of cooling. If the system is 3 tons, what is the total airflow?
A. 800 CFM
B. 1,200 CFM
C. 1,600 CFM
D. 2,400 CFM
Correct Answer: B
Rationale: 3 tons × 400 CFM/ton = 1,200 CFM. Standard airflow for air conditioning is 350-450
CFM per ton (typically 400). Heating systems may use different values. This calculation is
fundamental for verifying proper airflow using anemometers or temperature rise methods.
Incorrect airflow causes poor performance and equipment damage.
Q5: The boiling point of water at standard atmospheric pressure (14.7 psia) is 212°F. If pressure
is reduced to 10 psia, the boiling point will:
A. Increase to 240°F
B. Decrease to approximately 192°F
C. Remain at 212°F regardless of pressure
D. Increase to 250°F
Correct Answer: B
Rationale: Boiling point varies with pressure—lower pressure = lower boiling point (saturation
temperature). At 10 psia, water boils at approximately 192°F. This principle applies to
refrigerants: lower evaporator pressure = lower boiling point = cooler temperatures.
Understanding pressure-temperature relationships is essential for gauge interpretation and
troubleshooting.
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Q6: A technician measures 0.5 inches WC (water column) static pressure in a supply duct. This
is equivalent to approximately:
A. 0.02 psi
B. 0.25 psi
C. 2.5 psi
D. 25 psi
Correct Answer: A
Rationale: 1 psi = 27.7 inches WC, so 0.5" WC ÷ 27.7 = 0.018 psi ≈ 0.02 psi. HVAC pressures
are typically measured in inches WC (low pressure) or psig (refrigeration). Conversion between
units is essential for diagnostics and calculations. Option B is commonly confused with the
relationship between feet of head and psi (0.43 psi per foot).
Q7: Latent heat of vaporization is the energy required to:
A. Raise the temperature of a liquid
B. Change a liquid to vapor without temperature change
C. Change a vapor to liquid
D. Raise the temperature of a vapor
Correct Answer: B
Rationale: Latent heat of vaporization is energy absorbed during phase change from liquid to
vapor at constant saturation temperature (e.g., refrigerant boiling in evaporator). This heat
absorption provides cooling. Option A describes sensible heat. Option C describes latent heat of
condensation (energy released). Option D describes superheat (sensible). Phase change heat
transfer is the basis of refrigeration.
Q8: According to ACCA Manual J, which factor has the greatest impact on cooling load
calculations?
A. Window orientation and solar heat gain
B. Number of occupants
C. Lighting wattage
D. All factors are weighted equally
Correct Answer: A
Rationale: Solar heat gain through windows (especially east/west) often represents 50%+ of
cooling load in residential applications. Manual J calculations require detailed window
specifications (orientation, shading, U-factor, SHGC). While options B and C contribute,
, 4
envelope heat gain/loss dominates loads. Accurate Manual J prevents oversized equipment (short
cycling, humidity issues).
Q9: A heat pump operating in heating mode extracts heat from:
A. The outdoor air only
B. The indoor air only
C. The outdoor air, ground, or water source
D. Electric resistance elements only
Correct Answer: C
Rationale: Heat pumps extract heat from low-temperature sources (outdoor air, ground loop,
water) and deliver it indoors via refrigeration cycle. Air-source heat pumps (most common) work
even at low outdoor temperatures (though efficiency drops). Option D describes electric
furnaces, not heat pumps. Understanding heat sources explains heat pump operation limits.
Q10: The U-factor (thermal transmittance) of a building component represents:
A. Resistance to heat flow (higher is better)
B. Rate of heat transfer per degree temperature difference (lower is better)
C. Solar heat gain coefficient
D. Air leakage rate
Correct Answer: B
Rationale: U-factor measures heat transfer rate (BTU/hr·ft²·°F)—lower values indicate better
insulation. It is the inverse of R-value (U = 1/R). Option A describes R-value. Option C is SHGC
(solar gain). Option D is air leakage (ACH or CFM). U-factors are critical for load calculations
and energy code compliance.
Q11: A technician measures air velocity of 800 FPM in a 12" × 12" duct. What is the airflow in
CFM?
A. 400 CFM
B. 600 CFM
C. 800 CFM
D. 1,200 CFM
Correct Answer: C
Rationale: CFM = Velocity (FPM) × Area (ft²). 12" × 12" = 1 ft². 800 FPM × 1 ft² = 800 CFM.
This calculation verifies duct design and system performance. Common errors include using
HVAC Journeyman Actual Exam 2026/2027:
100% Verified Complete Questions and Answers |
Graded A+ for HVAC Licensing Success – Pass
Guaranteed - A+ Graded
Aligned with EPA Section 608, ASHRAE Standards, ACCA Manuals (J, S, D), and 2026/2027
IMC Updates
SECTION 1: HVAC THEORY & FUNDAMENTALS (12 Questions)
Q1: A technician measures the wet-bulb and dry-bulb temperatures of air entering an evaporator
coil. The purpose of determining these values is to calculate:
A. Refrigerant superheat only
B. Refrigerant subcooling only
C. Total heat content (enthalpy) of the air and system capacity
D. Compressor amp draw
Correct Answer: C
Rationale: Wet-bulb and dry-bulb temperatures allow calculation of enthalpy (total heat content)
using the psychrometric chart. This determines system capacity (BTUH = CFM × 4.5 × Δh) and
confirms proper dehumidification. Options A and B are refrigerant-side measurements. Option D
is electrical measurement. Psychrometrics is fundamental to proper system sizing and diagnosis
per ASHRAE Fundamentals.
Q2: According to the Second Law of Thermodynamics, heat energy naturally flows:
A. From cold objects to hot objects with external work
B. From hot objects to cold objects without external work
C. Equally in both directions simultaneously
D. Only through radiation, not conduction or convection
Correct Answer: B
Rationale: The Second Law states heat flows spontaneously from higher temperature to lower
temperature. External work (compressor) is required to move heat "uphill" (cold to hot) in
refrigeration cycles. Option A describes refrigeration with work input. Option C violates
thermodynamic principles. Option D incorrectly limits heat transfer modes. Understanding
thermodynamic laws explains why heat pumps require energy input.
,2
Q3: Sensible heat is defined as heat that:
A. Causes a change of state (latent heat)
B. Can be measured with a thermometer and causes temperature change
C. Is stored in refrigerant only
D. Cannot be calculated or measured
Correct Answer: B
Rationale: Sensible heat causes temperature change measurable with a thermometer (Q = m × c
× ΔT). Latent heat (Option A) causes phase change at constant temperature. Options C and D are
incorrect—sensible heat applies to all substances and is readily calculated. Distinguishing
sensible/latent heat is essential for load calculations (Manual J) and equipment selection.
Q4: A system has 400 CFM per ton of cooling. If the system is 3 tons, what is the total airflow?
A. 800 CFM
B. 1,200 CFM
C. 1,600 CFM
D. 2,400 CFM
Correct Answer: B
Rationale: 3 tons × 400 CFM/ton = 1,200 CFM. Standard airflow for air conditioning is 350-450
CFM per ton (typically 400). Heating systems may use different values. This calculation is
fundamental for verifying proper airflow using anemometers or temperature rise methods.
Incorrect airflow causes poor performance and equipment damage.
Q5: The boiling point of water at standard atmospheric pressure (14.7 psia) is 212°F. If pressure
is reduced to 10 psia, the boiling point will:
A. Increase to 240°F
B. Decrease to approximately 192°F
C. Remain at 212°F regardless of pressure
D. Increase to 250°F
Correct Answer: B
Rationale: Boiling point varies with pressure—lower pressure = lower boiling point (saturation
temperature). At 10 psia, water boils at approximately 192°F. This principle applies to
refrigerants: lower evaporator pressure = lower boiling point = cooler temperatures.
Understanding pressure-temperature relationships is essential for gauge interpretation and
troubleshooting.
,3
Q6: A technician measures 0.5 inches WC (water column) static pressure in a supply duct. This
is equivalent to approximately:
A. 0.02 psi
B. 0.25 psi
C. 2.5 psi
D. 25 psi
Correct Answer: A
Rationale: 1 psi = 27.7 inches WC, so 0.5" WC ÷ 27.7 = 0.018 psi ≈ 0.02 psi. HVAC pressures
are typically measured in inches WC (low pressure) or psig (refrigeration). Conversion between
units is essential for diagnostics and calculations. Option B is commonly confused with the
relationship between feet of head and psi (0.43 psi per foot).
Q7: Latent heat of vaporization is the energy required to:
A. Raise the temperature of a liquid
B. Change a liquid to vapor without temperature change
C. Change a vapor to liquid
D. Raise the temperature of a vapor
Correct Answer: B
Rationale: Latent heat of vaporization is energy absorbed during phase change from liquid to
vapor at constant saturation temperature (e.g., refrigerant boiling in evaporator). This heat
absorption provides cooling. Option A describes sensible heat. Option C describes latent heat of
condensation (energy released). Option D describes superheat (sensible). Phase change heat
transfer is the basis of refrigeration.
Q8: According to ACCA Manual J, which factor has the greatest impact on cooling load
calculations?
A. Window orientation and solar heat gain
B. Number of occupants
C. Lighting wattage
D. All factors are weighted equally
Correct Answer: A
Rationale: Solar heat gain through windows (especially east/west) often represents 50%+ of
cooling load in residential applications. Manual J calculations require detailed window
specifications (orientation, shading, U-factor, SHGC). While options B and C contribute,
, 4
envelope heat gain/loss dominates loads. Accurate Manual J prevents oversized equipment (short
cycling, humidity issues).
Q9: A heat pump operating in heating mode extracts heat from:
A. The outdoor air only
B. The indoor air only
C. The outdoor air, ground, or water source
D. Electric resistance elements only
Correct Answer: C
Rationale: Heat pumps extract heat from low-temperature sources (outdoor air, ground loop,
water) and deliver it indoors via refrigeration cycle. Air-source heat pumps (most common) work
even at low outdoor temperatures (though efficiency drops). Option D describes electric
furnaces, not heat pumps. Understanding heat sources explains heat pump operation limits.
Q10: The U-factor (thermal transmittance) of a building component represents:
A. Resistance to heat flow (higher is better)
B. Rate of heat transfer per degree temperature difference (lower is better)
C. Solar heat gain coefficient
D. Air leakage rate
Correct Answer: B
Rationale: U-factor measures heat transfer rate (BTU/hr·ft²·°F)—lower values indicate better
insulation. It is the inverse of R-value (U = 1/R). Option A describes R-value. Option C is SHGC
(solar gain). Option D is air leakage (ACH or CFM). U-factors are critical for load calculations
and energy code compliance.
Q11: A technician measures air velocity of 800 FPM in a 12" × 12" duct. What is the airflow in
CFM?
A. 400 CFM
B. 600 CFM
C. 800 CFM
D. 1,200 CFM
Correct Answer: C
Rationale: CFM = Velocity (FPM) × Area (ft²). 12" × 12" = 1 ft². 800 FPM × 1 ft² = 800 CFM.
This calculation verifies duct design and system performance. Common errors include using
