Free practice test — 12 questions with full explanations
Original CraftPATH practice questions. These are not real exam questions. Every answer includes the reasoning, why each wrong option fails, the code area it comes from, and the misconception it targets.
Question 1. On a fixed-orifice residential split system running in cooling, the measured suction superheat is unusually high while subcooling is low. What is the most likely cause?
Refrigeration Cycle and System Diagnostics · Medium · Objective: Interpret superheat as a charge and load indicator on a fixed-orifice system.
- A. The system is overcharged
- B. The system is undercharged or has a restriction ahead of the evaporator (correct)
- C. Indoor airflow is far below design
- D. The condenser fan motor has failed
Correct answer: B. The system is undercharged or has a restriction ahead of the evaporator
Why this is right: High superheat with low subcooling means the evaporator is starved: not enough refrigerant is reaching it to finish boiling near the coil outlet, and the condenser is not backing up liquid. That pattern points to an undercharge or a restriction upstream of the metering device.
Why the other options are wrong:
- A. The system is overcharged — An overcharge drives superheat down and subcooling up, the opposite of what was measured.
- C. Indoor airflow is far below design — Low indoor airflow reduces the heat available to boil refrigerant, which lowers superheat rather than raising it.
- D. The condenser fan motor has failed — A failed condenser fan raises head pressure and typically raises subcooling, not the pattern described.
Where this shows up on the job: This two-number read is how experienced techs decide whether to reach for gauges or for an airflow meter, and it prevents the most common field error of adding refrigerant to a system that does not need it.
Code reference: Refrigeration cycle fundamentals and manufacturer charging charts
Common misconception: Treating superheat as a standalone number instead of reading it against subcooling.
Question 2. Which EPA Section 608 certification type is required to service a low-pressure centrifugal chiller?
Refrigerant Handling, Recovery, and EPA 608 Law · Easy · Objective: Match EPA Section 608 certification types to equipment categories.
- A. Type I
- B. Type II
- C. Type III (correct)
- D. Any type, because chillers are exempt
Correct answer: C. Type III
Why this is right: Type III covers low-pressure appliances, which includes low-pressure centrifugal chillers. Type I covers small appliances, Type II covers high-pressure and very-high-pressure appliances, and Universal covers all three categories.
Why the other options are wrong:
- A. Type I — Type I is limited to small appliances charged with five pounds or less of refrigerant.
- B. Type II — Type II covers high-pressure equipment such as typical split systems and rooftop units, not low-pressure chillers.
- D. Any type, because chillers are exempt — No refrigerant-containing appliance category is exempt from the technician certification requirement.
Where this shows up on the job: Commercial service companies check certification type before dispatching, because sending a Type II technician to a low-pressure chiller is a federal compliance problem, not just a scheduling problem.
Code reference: Clean Air Act Section 608 technician certification categories, 40 CFR Part 82 Subpart F
Common misconception: Believing Universal certification is automatic once you hold two of the three types.
Question 3. A technician pulls refrigerant out of a system into an approved cylinder for later return to the same system. Under Section 608 terminology, what has the technician performed?
Refrigerant Handling, Recovery, and EPA 608 Law · Medium · Objective: Distinguish recovery, recycling, reclamation, and evacuation.
- A. Reclamation, because the refrigerant will be reused
- B. Recovery, because the refrigerant was removed and stored without processing (correct)
- C. Recycling, because the refrigerant left the system
- D. Venting, because the system was opened
Correct answer: B. Recovery, because the refrigerant was removed and stored without processing
Why this is right: Recovery is removing refrigerant from a system and storing it in an external container without testing or processing it. Recycling cleans refrigerant through oil separation and filtration in the field, and reclamation reprocesses it to a specified purity standard at a certified facility.
Why the other options are wrong:
- A. Reclamation, because the refrigerant will be reused — Reclamation requires processing to a purity specification and verification by a certified reclaimer, not simply capturing the charge.
- C. Recycling, because the refrigerant left the system — Recycling implies field processing through a recycling machine, which was not described.
- D. Venting, because the system was opened — Venting means releasing refrigerant to the atmosphere, which is prohibited and is the opposite of what happened.
Where this shows up on the job: These three words appear constantly on invoices, EPA recordkeeping, and exam questions, and using the wrong one on a compliance record is a citable mistake.
Code reference: Clean Air Act Section 608 definitions, 40 CFR Part 82 Subpart F
Common misconception: Using recovery and recycling interchangeably because both mean the refrigerant left the system.
Question 4. In Florida, what is the practical difference between a certified contractor license and a registered contractor license?
Florida Law, Rules, Business, and Safety · Easy · Objective: Distinguish certified from registered contractor licensure in Florida.
- A. A certified license is valid statewide, while a registered license is valid only in jurisdictions that issued local competency (correct)
- B. A certified license expires annually and a registered license never expires
- C. A registered license permits larger projects than a certified license
- D. There is no difference; the terms are interchangeable
Correct answer: A. A certified license is valid statewide, while a registered license is valid only in jurisdictions that issued local competency
Why this is right: Florida issues certified licenses that authorize work anywhere in the state, and registered licenses that authorize work only within the local jurisdiction whose competency requirements the licensee satisfied. The distinction governs where you may legally contract.
Why the other options are wrong:
- B. A certified license expires annually and a registered license never expires — Both license types are renewed on the board's renewal cycle; neither is permanent.
- C. A registered license permits larger projects than a certified license — Registered licensure is geographically narrower, not broader in project scope.
- D. There is no difference; the terms are interchangeable — The two are distinct statutory categories with different scopes of practice.
Where this shows up on the job: Contractors expanding from one county into the next metro get caught by this constantly, because a registered license does not travel with the truck.
Code reference: Florida Statutes Chapter 489, construction contracting licensure categories
Common misconception: Assuming any Florida state-issued license authorizes work statewide.
Question 5. Florida separates air-conditioning contractors into Class A and Class B. What primarily distinguishes the two?
Florida Law, Rules, Business, and Safety · Medium · Objective: Identify the scope limitation that separates Class A from Class B air-conditioning contracting.
- A. Class B may only work on residential property
- B. Class A has no cooling-capacity limitation, while Class B is limited to equipment below a defined capacity (correct)
- C. Class A may only perform new construction
- D. Class B may not pull permits
Correct answer: B. Class A has no cooling-capacity limitation, while Class B is limited to equipment below a defined capacity
Why this is right: The Class A and Class B air-conditioning classifications are separated primarily by the cooling capacity of the equipment the licensee may install and service. Class A carries no tonnage ceiling, while Class B is capped. Confirm the current capacity threshold with DBPR before relying on it.
Why the other options are wrong:
- A. Class B may only work on residential property — The classification is capacity-based, not strictly residential versus commercial.
- C. Class A may only perform new construction — Both classes may perform new construction and service work within their scope.
- D. Class B may not pull permits — Any properly licensed contractor may pull permits for work within their scope.
Where this shows up on the job: Bidding a rooftop package unit above your class limit voids the permit and exposes the license, which is why the capacity number belongs on your estimating checklist.
Code reference: Florida Statutes Chapter 489 and Florida Administrative Code Chapter 61G4 classification provisions
Common misconception: Treating Class B as a starter license with the same field scope as Class A.
Question 6. A residential air handler is rated for 0.5 inches water column total external static pressure, but the measured value across the unit is 1.1 inches. What is the most likely consequence?
Airflow, Duct Design, and Ventilation · Medium · Objective: Diagnose a system using total external static pressure.
- A. Airflow is below design, reducing capacity and risking coil freezing (correct)
- B. Airflow is above design, overcooling the space
- C. Refrigerant charge will read as overcharged
- D. The compressor will draw less current than rated
Correct answer: A. Airflow is below design, reducing capacity and risking coil freezing
Why this is right: Static pressure above the blower's rating means the duct system is fighting the fan, so delivered airflow drops below design. Reduced airflow lowers capacity, drives suction pressure and coil temperature down, and can freeze the evaporator.
Why the other options are wrong:
- B. Airflow is above design, overcooling the space — Higher static pressure restricts flow; it cannot increase it.
- C. Refrigerant charge will read as overcharged — Low airflow lowers superheat and can mimic an overcharge, but the charge itself is unchanged — reading it as an overcharge is the classic misdiagnosis.
- D. The compressor will draw less current than rated — Reduced evaporator load lowers suction pressure, which changes compressor loading but is not a reliable diagnostic here.
Where this shows up on the job: Measuring static pressure before touching gauges is the single habit that separates technicians who fix systems from technicians who keep adding refrigerant to them.
Code reference: Florida Building Code Mechanical volume airflow provisions and manufacturer blower performance tables
Common misconception: Assuming a system that blows air out of the registers has adequate airflow.
Question 7. In Florida's hot-humid climate, what is the primary consequence of installing cooling equipment significantly larger than the calculated load?
Load Calculation and Equipment Selection · Hard · Objective: Explain why oversizing fails in a hot-humid climate.
- A. Lower operating cost because the equipment runs less
- B. Short cycling that satisfies the thermostat before latent load is removed, leaving high indoor humidity (correct)
- C. Improved dehumidification because more total capacity is available
- D. Longer compressor life due to reduced run time
Correct answer: B. Short cycling that satisfies the thermostat before latent load is removed, leaving high indoor humidity
Why this is right: Dehumidification depends on run time. Oversized equipment drops the dry-bulb temperature quickly, satisfies the thermostat, and shuts off before the coil has run long enough to condense moisture, so the space ends up cool and clammy. In a hot-humid climate that is a comfort and building-durability failure, not just an efficiency one.
Why the other options are wrong:
- A. Lower operating cost because the equipment runs less — Short cycling increases start losses and typically raises operating cost.
- C. Improved dehumidification because more total capacity is available — Total capacity does not help if the run time is too short to remove latent load.
- D. Longer compressor life due to reduced run time — Frequent starts are harder on compressors and motors than steady run time.
Where this shows up on the job: Mold and musty-smell callbacks in Florida homes are overwhelmingly oversizing problems that a proper load calculation would have prevented.
Code reference: Florida Building Code Energy Conservation volume and recognized residential load calculation procedures
Common misconception: Sizing by square footage rules of thumb instead of a calculated sensible and latent load.
Question 8. A single-phase condensing unit hums, draws locked-rotor current, and trips on overload without starting. Which component should be tested first?
Electrical Systems and Controls · Medium · Objective: Troubleshoot a compressor that hums and trips without starting.
- A. The thermostat anticipator
- B. The run capacitor and, where fitted, the start components (correct)
- C. The condensate float switch
- D. The liquid line filter drier
Correct answer: B. The run capacitor and, where fitted, the start components
Why this is right: A compressor that hums and pulls locked-rotor amperage is receiving power but cannot develop starting torque. The run capacitor, and any hard-start kit or potential relay, are the components that supply that phase shift, so they are tested before the compressor is condemned.
Why the other options are wrong:
- A. The thermostat anticipator — The anticipator affects thermostat cycling behavior, not compressor starting torque.
- C. The condensate float switch — A float switch opens the control circuit; the compressor would not be energized at all.
- D. The liquid line filter drier — A restricted drier affects refrigerant flow and pressures, not the ability to start electrically.
Where this shows up on the job: A large share of compressors replaced in the field were mechanically fine and needed a capacitor that costs a fraction of the callback.
Code reference: NEC Article 440 air-conditioning equipment provisions and manufacturer electrical service literature
Common misconception: Equating a humming compressor with a seized compressor.
Question 9. After brazing a repair on an open refrigerant circuit, why must the system be evacuated with a vacuum pump before recharging?
Refrigerant Handling, Recovery, and EPA 608 Law · Medium · Objective: Apply evacuation and moisture removal requirements after an open repair.
- A. To pressurize the system so the charge will enter faster
- B. To remove non-condensable gases and boil off moisture that would form acid and restrict the metering device (correct)
- C. To confirm the correct refrigerant type
- D. Because the charge cannot be weighed until a vacuum is pulled
Correct answer: B. To remove non-condensable gases and boil off moisture that would form acid and restrict the metering device
Why this is right: Evacuation removes air and other non-condensables, which raise head pressure and hurt capacity, and it lowers pressure enough for trapped water to boil off. Moisture combined with refrigerant and oil forms acid and can freeze at the metering device.
Why the other options are wrong:
- A. To pressurize the system so the charge will enter faster — Evacuation lowers pressure; it does not pressurize the system.
- C. To confirm the correct refrigerant type — Refrigerant identification is done with an analyzer before recovery, not by evacuation.
- D. Because the charge cannot be weighed until a vacuum is pulled — A charge can be weighed in regardless, but charging into a wet or air-filled system damages it.
Where this shows up on the job: Skipping a proper deep evacuation is the most common cause of a repeat failure within a year of an otherwise correct repair.
Code reference: Clean Air Act Section 608 evacuation requirements, 40 CFR Part 82 Subpart F, and manufacturer service procedures
Common misconception: Treating a short vacuum pull as equivalent to a verified deep evacuation held under a micron gauge.
Question 10. What is the commonly used design airflow target for residential air conditioning in a humid climate?
Airflow, Duct Design, and Ventilation · Easy · Objective: Recall the standard airflow target used for residential cooling.
- A. About 100 CFM per ton
- B. About 250 CFM per ton
- C. About 350 to 400 CFM per ton (correct)
- D. About 800 CFM per ton
Correct answer: C. About 350 to 400 CFM per ton
Why this is right: Residential cooling is typically designed around 350 to 400 CFM per ton, with the lower end of that range favored in humid climates because slower air across the coil increases moisture removal. Confirm the manufacturer's specification for the specific equipment.
Why the other options are wrong:
- A. About 100 CFM per ton — 100 CFM per ton would starve the coil and freeze it.
- B. About 250 CFM per ton — 250 CFM per ton is far below any standard design target for comfort cooling.
- D. About 800 CFM per ton — 800 CFM per ton would sharply reduce latent removal and leave the space humid.
Where this shows up on the job: In Florida, dialing airflow toward the low end of the range is a deliberate humidity-control decision, not a shortcut.
Code reference: Recognized residential airflow design practice and manufacturer equipment data
Common misconception: Believing more airflow always means better cooling performance.
Question 11. In a typical condensing unit, what is the functional difference between the contactor and the compressor's internal overload?
Electrical Systems and Controls · Hard · Objective: Distinguish the roles of the contactor and the overload in the compressor circuit.
- A. They are redundant devices protecting against the same failure
- B. The contactor switches line power to the compressor on a control signal, while the overload opens on excessive current or winding temperature (correct)
- C. The contactor protects against short circuits and the overload switches the unit on
- D. The overload sets the compressor's run capacitance
Correct answer: B. The contactor switches line power to the compressor on a control signal, while the overload opens on excessive current or winding temperature
Why this is right: The contactor is a switching device: low-voltage control energizes its coil and its contacts close to feed line power to the compressor and condenser fan. The internal overload is a protective device that opens when current or winding temperature exceeds a limit. Switching and protection are separate functions.
Why the other options are wrong:
- A. They are redundant devices protecting against the same failure — One is a control device and one is a protective device; they are not redundant.
- C. The contactor protects against short circuits and the overload switches the unit on — The roles are reversed, and short-circuit protection comes from the branch-circuit overcurrent device.
- D. The overload sets the compressor's run capacitance — Capacitance is set by the run capacitor, not the overload.
Where this shows up on the job: Understanding this split is what lets you decide whether a no-cool call is a control problem upstream of the contactor or a protection trip inside the compressor.
Code reference: NEC Article 440 and manufacturer wiring diagrams
Common misconception: Assuming any device in the compressor circuit that opens is a protection device.
Question 12. Florida contractor examinations are administered as open-book, reference-based tests. What does this most change about how a candidate should prepare?
Florida Law, Rules, Business, and Safety · Easy · Objective: Identify how the open-book format should change preparation.
- A. Memorizing every table value becomes the top priority
- B. Preparation should focus on tabbing the approved references and locating governing rules quickly under time pressure (correct)
- C. Studying is largely unnecessary because references are allowed
- D. Only the business and finance portion needs preparation
Correct answer: B. Preparation should focus on tabbing the approved references and locating governing rules quickly under time pressure
Why this is right: An open-book exam measures retrieval speed and correct application rather than recall. Candidates who tab the approved reference list, rehearse the lookup path for each recurring question type, and practice against a clock consistently outperform candidates who try to memorize content.
Why the other options are wrong:
- A. Memorizing every table value becomes the top priority — Memorization has limited value when the references are in front of you; knowing where the rule lives matters more.
- C. Studying is largely unnecessary because references are allowed — Open-book exams routinely fail unprepared candidates because the time limit punishes slow lookups.
- D. Only the business and finance portion needs preparation — The trade knowledge portion carries substantial technical content that must be prepared independently.
Where this shows up on the job: Experienced Florida mechanical contractors who fail a first attempt almost always ran out of time rather than out of knowledge.
Code reference: Confirm the approved reference list and permitted book condition in the current candidate information booklet
Common misconception: Believing open-book means low-effort.
How to study for the Florida HVAC contractor exam
Confirm the approved reference list before you spend a dollar
Florida publishes an approved reference list for each contractor examination, and the trade knowledge portion is written against those specific books and editions. The list typically spans the Florida Building Code Mechanical volume, an air-conditioning and refrigeration reference, a load calculation manual, and the business and finance references for the second part of the exam. Editions change on a cycle, and page and table locations move with them. Confirm the current list and edition through DBPR and its testing vendor before buying anything, because arriving with a prior edition costs you time on every lookup and can render a reference inadmissible.
Tab your references like test equipment
In an open-book exam the reference books are tools, and how fast you use them determines your score. Tab the psychrometric and refrigerant pressure-temperature tables, the load calculation worksheets, the ventilation and duct sizing tables in the mechanical code, the equipment efficiency provisions in the energy code, and the licensing and lien-law chapters for the business portion. Then rehearse going from a question's key phrase to the governing page in under fifteen seconds. Write your own margin notes for multi-step procedures so you execute a rehearsed sequence rather than reasoning from scratch under a clock.
Get EPA Section 608 out of the way first
Section 608 certification is federal, separate from any Florida license, and required before you legally touch regulated refrigerant. It is also the cheapest and fastest credential in your path, and its content overlaps heavily with the refrigerant handling domain of the state trade exam. Study the four certification types, the recovery and evacuation requirements, the venting prohibition, leak repair thresholds, and cylinder handling and recordkeeping rules. Passing 608 early gives you a legitimate credential to work under while you accumulate the experience the state license requires, and it front-loads material you will see again.
Drill the diagnostic number pairs until they are reflexive
A large share of the trade knowledge exam reduces to reading two numbers against each other: superheat against subcooling, static pressure against blower rating, temperature split against airflow, and amperage against nameplate. Build a mental table of what each combination means and which one is the cause rather than the symptom. Most wrong answers on this material are plausible-sounding single-number conclusions, and the option lists are written to reward the candidate who checked the second number.
Study Florida law, rules, and business as its own subject
Florida Statutes Chapter 489 and Florida Administrative Code Chapter 61G4 cover licensure categories, classification scope, qualifying agents, financial responsibility, insurance, permitting duties, and disciplinary grounds. The business and finance portion adds contract, lien law, payroll, tax, estimating, and job-cost material that has nothing to do with refrigeration. Candidates who come from the field routinely underestimate this half and fail it while passing the trade portion. Budget separate study sessions for it and treat it as recall material you read carefully once and then drill.
Build a realistic schedule around timed practice
Eight to twelve weeks is a reasonable runway for a working technician preparing for both examination parts. Spend the first two weeks confirming references and tabbing them, the middle weeks alternating one technical domain and one business topic per session, and the final three weeks on full timed practice sets under exam conditions with the actual books you will carry. Track which domain your misses cluster in and spend remaining time there rather than re-reading material you already know. Frequency builds retention; the long timed sessions build pacing, which is what actually fails candidates on an open-book exam.
Frequently asked questions
Is this Florida HVAC practice test free?
Yes. Every question, explanation, and study section on this page is free with no signup and no paywall. A free CraftPATH account only adds saved progress, streaks, and a review queue built from the questions you miss.
Are these real Florida HVAC exam questions?
No. Every question is original CraftPATH material written against published exam outlines, the Florida Building Code, and federal EPA Section 608 regulations. Reproducing licensed exam content would be illegal, and memorizing leaked questions does not teach the reasoning the exam actually tests.
Do I need a Florida license to work on HVAC systems?
Working as an employed technician and contracting for HVAC work are different things. Contracting requires a Florida certified or registered contractor license through DBPR. Separately, federal law requires EPA Section 608 technician certification before you service, maintain, repair, or dispose of equipment containing regulated refrigerant, regardless of who employs you.
What is the difference between a Class A and Class B air-conditioning contractor in Florida?
The classifications are separated primarily by the cooling capacity of the equipment the licensee may work on. Class A carries no tonnage limit while Class B is capped at a defined capacity. We do not publish the threshold here because it is set by rule and can change — confirm the current limit with DBPR before bidding work near the line.
Is the Florida HVAC contractor exam open book?
Florida contractor examinations are administered as open-book, reference-based tests. The approved reference list, the permitted condition of each book, and any tabbing or highlighting rules are set in the current candidate information booklet, so confirm them before exam day rather than relying on what a coworker brought last year.
How much experience do I need to qualify for a Florida HVAC contractor license?
Florida eligibility combines documented mechanical trade experience, supervisory experience, and in some paths accredited education credit. We do not publish the year thresholds here because they are set by rule and can change — confirm the current requirement and the affidavit documentation DBPR accepts before you apply.
Does EPA 608 certification expire?
EPA Section 608 technician certification does not carry a routine expiration date, unlike the Florida contractor license, which is renewed on the board's cycle with continuing education. Keep your certification card and your employer's recordkeeping current regardless, because both are subject to inspection.
How should I use this page if my exam is in a month?
Work all twelve questions with your approved references open and time yourself finding each one. Note which domains you were slowest in, then run the matching topic drills in the CraftPATH HVAC question bank daily and one timed full set each weekend, and reserve at least two sessions for the business and finance material.