Florida HVAC Exam Prep FREE Sample Exam — Fixed Set

Three compressors run in parallel on a rack. One compressor keeps losing oil while the others gain oil, and there is no external leak. What part of the oil management system should be checked first?

The liquid-line filter driers, because a restricted drier core is the component that normally meters oil from the reservoir into each individual crankcase

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The oil level regulators and the oil reservoir supply feeding each crankcase

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The thermostatic expansion valves, because each valve is responsible for returning a measured share of the system oil directly to its own compressor

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The condenser fan cycling control, because uneven condenser airflow is what distributes oil unequally among compressors piped in parallel on a rack

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A TXV system runs with a sweating, frost-covered suction line to the compressor. Readings: suction 156 psig, superheat 2°F, subcooling 6°F, compressor amps 112% of rated, discharge superheat low, airflow and charge weight both verified correct, and the frost persists after the bulb is re-secured and insulated. What is the most likely cause?

A dirty condenser coil restricting heat rejection, which raises head pressure sharply while leaving evaporator superheat near its setpoint

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A restricted liquid-line drier, which would starve the valve, raise superheat, and show a temperature drop across the drier body

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A TXV stuck open

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A low refrigerant charge, which starves the evaporator and produces high superheat with low suction pressure, the reverse of this pattern

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An inspection finds heavy flaking rust and scale shedding from inside the heat exchanger onto the burners below. What is the best interpretation?

The condition is normal for any exchanger over five years old and requires no documentation, cleaning, or follow-up of any kind

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The scale proves the exchanger is made of stainless steel, because only stainless surfaces produce visible flaking as they age

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Advanced corrosion weakening the exchanger

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The deposits prove the furnace has been underfired for years, because only low temperatures allow any corrosion products to form

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An oil burner consistently ignites with a loud puff several seconds after the motor starts, then runs cleanly. Spark is strong and present on time. The delay most likely comes from:

A cad cell with low resistance in darkness, caused by a cracked cell housing that admits room light into the burner compartment even when the access panel is closed and the flame is completely out

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Slow oil delivery to the nozzle — for example air in the line, a clogged nozzle strainer, or a weak delayed-opening solenoid — so fuel arrives after the trial has begun

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Excessive stack draft pulling the flame off the head

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A thermostat calling on both W1 and W2 together

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A homeowner expects zoning dampers to cure weak airflow that exists today with all rooms calling, on an undersized common trunk. Why will zoning alone disappoint?

Zoning increases the capacity of the common trunk, so weak airflow with all zones calling proves the trunk is oversized rather than undersized for the equipment

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Dampers add resistance and only redistribute air; they do not enlarge a trunk that is already too small for total airflow

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Weak airflow with all zones calling is caused by the zone panel withholding blower speed, and removing the panel restores full trunk capacity without any duct change at all

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Zoning cures total airflow problems whenever one room is weak, because closing other branches permanently is an accepted substitute for sizing the common duct to the equipment

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Comfort complaint. A system satisfies its thermostat in about seven minutes and shuts off while far bedrooms remain 4 degrees warm. The thermostat sits on a wall directly in the discharge path of a nearby supply register, and a thermometer held at the thermostat reads several degrees cooler than a thermometer in the room center while the system runs. Between cycles the two readings converge. What is the most likely cause?

An oversized air conditioner short-cycling on capacity, which would satisfy the whole house's sensible load quickly and would not leave the thermostat reading colder than the room only while air is moving

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A thermostat with a drifting sensor reading low, which would read off from room temperature at all times, including between cycles when these two readings converge

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Supply air washing over the thermostat and satisfying it early

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A weak compressor losing capacity mid-cycle, which would lengthen rather than shorten run times and would warm the supply air instead of cooling the thermostat's wall

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Corrugated stainless steel tubing (CSST) is used for part of a home’s gas distribution. Besides following the manufacturer’s instructions for fittings and support, what widely required safety measure applies to the CSST system?

Electrical bonding of the gas piping system to reduce lightning-related damage risk

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Painting the tubing black so it looks like iron pipe

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Burying it without any protective sleeve or coating wherever it passes through concrete, masonry, or underground soil

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Testing it with oxygen at high pressure

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Mold grows on an exterior wall behind a large bookcase, while the room’s measured RH is a moderate 45% and nearby open wall areas are clean. What explains the localized growth?

The bookcase is leaking stored moisture from its wood into the wall, so the mold is feeding on water released by the furniture rather than on humidity

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Mold behind furniture indicates a plumbing leak inside that wall, because room humidity at 45% can never support mold growth under any surface condition

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The wall behind the bookcase is warmer than the open wall because the bookcase insulates it, and mold prefers that warmth regardless of surface moisture

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Cold wall surface raises local RH

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Before raising an aerial lift to set a curb adapter, the operator walks around the machine and finds a hydraulic leak and a worn tire. What should the operator do?

Operate the lift at reduced height all day, because hydraulic leaks and tire wear only become dangerous when the platform is near its maximum elevation

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Tag the lift out of service and report the defects before use

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Top off the hydraulic fluid and proceed, since a leak that can be refilled during the shift does not count as a defect requiring the lift to be removed

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Swap the lift's parking spot with another crew's machine without mentioning the defects, letting the next operator discover the problems during their own work

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A system has always short-cycled and left the home humid, and the owner asks for ‘the same size again.’ What should the contractor do?

Install the same size, because the equipment that was there longest defines the correct size for that house by precedent

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Go one size larger so the system satisfies the thermostat faster, which is the usual cure for humidity complaints in summer

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Run a load calculation and select from its results, because repeating the old size perpetuates the oversizing problem

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Go two sizes smaller without a calculation, since humidity complaints always mean the system is exactly two sizes too big

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How many examinations must a Division II contractor such as a Class A air-conditioning applicant pass to be licensed?

A Division II applicant must pass one examination, the general trade knowledge examination for the category sought.

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A Division II applicant must pass three examinations covering business, contract administration, and project management topics.

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A Division II applicant must pass four examinations covering trade knowledge, business, safety, and building code topics.

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A Division II applicant must pass two examinations, business and finance and general trade knowledge for the category.

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A candidate owns only a PDF of the SMACNA fibrous glass duct construction standards and asks how that title may be brought to the 2026 examination. What is the correct handling?

The PDF may never be used in any form, because only factory-printed hardcover editions of the duct standards may enter the test center.

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The PDF may be read on a tablet during the examination, because electronic display is treated the same as a printed bound copy.

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The PDF must be printed single-sided and carried loose in a folder, because binding a PDF copy is treated as altering the reference.

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A bound PDF version of that title may be brought, printed and bound so it remains bound for the examination like other references.

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Florida HVAC Exam Prep FREE Sample Exam — Fixed Set

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