Florida HVAC Contractor Exam NEWEST 2026 UPDATE FAST
REVIWED FROM ACTUAL TEST 100 QUESTIONS AND 100%
VERIFIED ANSWERS| A+ GRADE Q&A | INSTANT DOWNLOAD
PDF
1. Refrigerant Cycle
Which component of an HVAC system is responsible for lowering the pressure and
temperature of the liquid refrigerant?
A. Suction line
B. Condenser coil
C. Expansion valve
D. Compressor
Explanation: The expansion valve reduces refrigerant pressure, allowing it to
absorb heat in the evaporator.
2. Heat Load Calculation
If a room gains 5,000 BTU/hr from solar heat and 3,000 BTU/hr from occupants
and equipment, what is the total sensible heat gain?
A. 5,000 BTU/hr
B. 8,000 BTU/hr
C. 15,000 BTU/hr
D. 3,000 BTU/hr
Explanation: Sensible heat gain is the sum of all direct heat inputs; here 5,000 +
3,000 = 8,000 BTU/hr.
3. Electrical Basics
,In a single-phase circuit, what happens to current if voltage decreases and
resistance remains constant?
A. Resistance increases
B. Current increases
C. Current decreases
D. Voltage stays the same
Explanation: According to Ohm’s Law (I = V/R), if voltage drops and resistance is
unchanged, current rises proportionally.
4. Refrigerant Properties
Which refrigerant is non-ozone-depleting and commonly used in modern
residential HVAC systems?
A. R-22
B. R-410A
C. R-502
D. R-12
Explanation: R-410A does not harm the ozone layer and has replaced older
refrigerants like R-22.
5. Safety – Electrical
What is the purpose of a grounding conductor in an HVAC electrical system?
A. Increase voltage output
B. Provide a safe path for fault current
C. Improve system efficiency
D. Reduce refrigerant charge
Explanation: Grounding protects people and equipment by directing fault current
safely to earth.
,6. Ventilation Requirements
The minimum required outdoor air ventilation rate for a residential HVAC system
is based on:
A. Number of electrical circuits
B. Compressor size
C. Occupancy and space usage
D. Refrigerant brand
Explanation: Ventilation rates depend on occupancy and space type per building
standards.
7. Compression Ratio
A high compressor discharge temperature is most likely caused by:
A. Low ambient airflow
B. Proper refrigerant charge
C. Overcharge of refrigerant
D. Lower superheat
Explanation: Excess refrigerant raises discharge pressure and temperature,
stressing the compressor.
8. Psychrometrics
Which of the following describes the amount of water vapor present in the air
compared to the maximum it could hold at that temperature?
A. Dry-bulb temperature
B. Wet-bulb depression
C. Relative humidity
D. Dew point
, Explanation: Relative humidity is the percentage of moisture in the air relative to
saturation.
9. Code Compliance
Before performing HVAC modifications, a contractor must obtain:
A. Customer signature only
B. A permit from the local authority
C. HVAC manual
D. Contractor’s personal liability insurance
Explanation: Permits ensure work is inspected and meets building codes.
10. Duct Design
Which factor increases duct friction losses the most?
A. Larger duct size
B. Smooth insulation
C. Sharp turns and abrupt changes
D. Higher pressure fan
Explanation: Turbulence from turns increases friction loss in the duct system.
If you’d like more questions by topic (e.g., electrical, load calculations,
refrigeration laws), I can generate practice sets in the same format.
11-50
Below are practice questions #11–50 for the Florida HVAC Contractor Exam, with
the correct answer in bold and brief explanations in italics. These are original
practice questions designed to match the official exam topics and difficulty level
(not actual exam questions).
REVIWED FROM ACTUAL TEST 100 QUESTIONS AND 100%
VERIFIED ANSWERS| A+ GRADE Q&A | INSTANT DOWNLOAD
1. Refrigerant Cycle
Which component of an HVAC system is responsible for lowering the pressure and
temperature of the liquid refrigerant?
A. Suction line
B. Condenser coil
C. Expansion valve
D. Compressor
Explanation: The expansion valve reduces refrigerant pressure, allowing it to
absorb heat in the evaporator.
2. Heat Load Calculation
If a room gains 5,000 BTU/hr from solar heat and 3,000 BTU/hr from occupants
and equipment, what is the total sensible heat gain?
A. 5,000 BTU/hr
B. 8,000 BTU/hr
C. 15,000 BTU/hr
D. 3,000 BTU/hr
Explanation: Sensible heat gain is the sum of all direct heat inputs; here 5,000 +
3,000 = 8,000 BTU/hr.
3. Electrical Basics
,In a single-phase circuit, what happens to current if voltage decreases and
resistance remains constant?
A. Resistance increases
B. Current increases
C. Current decreases
D. Voltage stays the same
Explanation: According to Ohm’s Law (I = V/R), if voltage drops and resistance is
unchanged, current rises proportionally.
4. Refrigerant Properties
Which refrigerant is non-ozone-depleting and commonly used in modern
residential HVAC systems?
A. R-22
B. R-410A
C. R-502
D. R-12
Explanation: R-410A does not harm the ozone layer and has replaced older
refrigerants like R-22.
5. Safety – Electrical
What is the purpose of a grounding conductor in an HVAC electrical system?
A. Increase voltage output
B. Provide a safe path for fault current
C. Improve system efficiency
D. Reduce refrigerant charge
Explanation: Grounding protects people and equipment by directing fault current
safely to earth.
,6. Ventilation Requirements
The minimum required outdoor air ventilation rate for a residential HVAC system
is based on:
A. Number of electrical circuits
B. Compressor size
C. Occupancy and space usage
D. Refrigerant brand
Explanation: Ventilation rates depend on occupancy and space type per building
standards.
7. Compression Ratio
A high compressor discharge temperature is most likely caused by:
A. Low ambient airflow
B. Proper refrigerant charge
C. Overcharge of refrigerant
D. Lower superheat
Explanation: Excess refrigerant raises discharge pressure and temperature,
stressing the compressor.
8. Psychrometrics
Which of the following describes the amount of water vapor present in the air
compared to the maximum it could hold at that temperature?
A. Dry-bulb temperature
B. Wet-bulb depression
C. Relative humidity
D. Dew point
, Explanation: Relative humidity is the percentage of moisture in the air relative to
saturation.
9. Code Compliance
Before performing HVAC modifications, a contractor must obtain:
A. Customer signature only
B. A permit from the local authority
C. HVAC manual
D. Contractor’s personal liability insurance
Explanation: Permits ensure work is inspected and meets building codes.
10. Duct Design
Which factor increases duct friction losses the most?
A. Larger duct size
B. Smooth insulation
C. Sharp turns and abrupt changes
D. Higher pressure fan
Explanation: Turbulence from turns increases friction loss in the duct system.
If you’d like more questions by topic (e.g., electrical, load calculations,
refrigeration laws), I can generate practice sets in the same format.
11-50
Below are practice questions #11–50 for the Florida HVAC Contractor Exam, with
the correct answer in bold and brief explanations in italics. These are original
practice questions designed to match the official exam topics and difficulty level
(not actual exam questions).
