Do I still need an ARCtick licence after the Certificate III?

Yes. To legally acquire, handle, recover or dispose of fluorocarbon refrigerant in Australia you must hold an ARCtick Refrigerant Handling Licence from the Australian Refrigeration Council, which is applied for separately. The qualification provides the underpinning competency.

How long does UEE32220 take to complete?

It is delivered over a typical 3-4 year apprenticeship, with around 932 hours of face-to-face training in blocks plus on-the-job training with your employer. There is no fixed exam date; you progress as you are assessed competent in each unit.

What is the difference between UEE32220 and UEE32225?

UEE32225 is the updated successor code to UEE32220 for the Certificate III in Air-Conditioning and Refrigeration. Both lead to the same refrigeration and air-conditioning mechanic trade; the core trade theory in this practice bank applies to either code.

Is this free practice as good as paid prep?

Our 100 practice questions cover the same trade-theory domains as the qualification and the ARCtick syllabus, with a teaching explanation for every answer plus free daily AI tutor interactions. All content is free forever and updated for 2026.

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100+ Free Cert III Air Conditioning & Refrigeration Practice Questions

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Key Facts: Cert III Air Conditioning & Refrigeration Exam

100

Practice Questions

OpenExamPrep

UEE32220

Qualification Code (successor UEE32225)

training.gov.au

3-4 years

Apprenticeship Duration

RTO delivery

Competency

Assessment Basis (no % pass mark)

ASQA

ARCtick

Refrigerant Handling Licence Required

Australian Refrigeration Council

AS/NZS 3000

Electrical Wiring Standard

Standards Australia

The Certificate III in Air-Conditioning and Refrigeration (UEE32220) is Australia's nationally recognised trade qualification for refrigeration and air-conditioning mechanics, delivered through a 3-4 year apprenticeship under ASQA-registered training organisations. It is competency-based: apprentices must be assessed 'Competent' across core and elective units through theory tests, practical demonstrations and on-the-job evidence rather than a single multiple-choice exam. Content spans the vapour-compression refrigeration cycle, refrigerants and ARCtick/F-gas handling, system components, electrical and controls for HVAC, psychrometrics, fault finding, and leak testing, evacuation and recovery, all referenced to AS/NZS standards. Legally handling refrigerant also requires a separate ARCtick Refrigerant Handling Licence. This free prep includes 100 research-based practice questions with explanations and an AI tutor.

Sample Cert III Air Conditioning & Refrigeration Practice Questions

Try these sample questions to test your Cert III Air Conditioning & Refrigeration exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1In the basic vapour-compression refrigeration cycle, which component is responsible for raising the pressure and temperature of the refrigerant vapour?

A.The condenser

B.The compressor

C.The evaporator

D.The expansion valve

Explanation: The compressor is the heart of the vapour-compression cycle. It draws in low-pressure, low-temperature vapour from the evaporator and compresses it, raising both its pressure and temperature so the refrigerant can later reject heat in the condenser.

2Where in the vapour-compression cycle does the refrigerant absorb heat from the conditioned space or product?

A.In the compressor

B.In the condenser

C.In the evaporator

D.In the liquid receiver

Explanation: The evaporator is the low-pressure heat-absorbing component. The cold, low-pressure refrigerant boils as it absorbs heat from the air or product passing over the coil, producing the cooling effect.

3The two phase changes that occur in a vapour-compression system are best described as:

A.Evaporation in the condenser and condensation in the evaporator

B.Evaporation in the evaporator and condensation in the condenser

C.Sublimation in the compressor and freezing in the receiver

D.Condensation in both heat exchangers

Explanation: Refrigerant boils (evaporates) in the evaporator while absorbing heat at low pressure, and condenses in the condenser while rejecting heat at high pressure. These two latent-heat phase changes are how the system moves heat.

4Superheat in a refrigeration system is defined as:

A.The temperature of the liquid below its saturation temperature

B.The temperature of the vapour above its saturation temperature at that pressure

C.The total pressure rise across the compressor

D.The difference between condensing and evaporating pressures

Explanation: Superheat is the number of degrees a refrigerant vapour has been heated above its saturation (boiling) temperature for the pressure it is at. Measured at the evaporator outlet, it confirms all liquid has boiled off, protecting the compressor from liquid slugging.

5Subcooling at the condenser outlet is important because it:

A.Ensures only liquid refrigerant reaches the metering device, preventing flash gas in the liquid line

B.Guarantees the compressor receives liquid refrigerant

C.Reduces the suction superheat to zero

D.Increases the discharge temperature for better oil return

Explanation: Subcooling cools the liquid below its saturation temperature so it remains fully liquid as it travels to the metering device. This prevents premature flashing (vapour bubbles) in the liquid line, which would reduce the metering device's capacity and starve the evaporator.

6On a pressure-enthalpy (P-h) diagram, the throttling process through the expansion valve is represented by a line that is:

A.Horizontal (constant pressure)

B.Vertical and to the left (constant enthalpy, falling pressure)

C.Along the saturated vapour line

D.Increasing in both pressure and enthalpy

Explanation: Throttling through a metering device is an isenthalpic (constant-enthalpy) process, drawn as a vertical line on a P-h chart where pressure drops but enthalpy stays the same. Some liquid flashes to vapour, cooling the mixture to the evaporating temperature.

7The coefficient of performance (COP) of a refrigeration system in cooling mode is calculated as:

A.Heat rejected at the condenser divided by compressor work

B.Refrigerating effect (heat absorbed) divided by the work input to the compressor

C.Compressor work divided by refrigerating effect

D.Evaporating pressure divided by condensing pressure

Explanation: COP for cooling = useful refrigerating effect (heat absorbed in the evaporator) divided by the work energy supplied to the compressor. A higher COP means more cooling per unit of electrical input, indicating better efficiency.

8The 'refrigerating effect' of a system refers to the:

A.Total heat rejected at the condenser

B.Heat absorbed by the refrigerant per unit mass as it passes through the evaporator

C.Work done by the compressor motor

D.Latent heat of the discharge gas

Explanation: The refrigerating effect is the amount of heat (enthalpy change) each kilogram of refrigerant absorbs as it evaporates in the evaporator. Multiplied by mass flow rate, it gives the system's cooling capacity in kilowatts.

9Latent heat, as it applies to refrigeration, is the heat that:

A.Changes the temperature of a substance without changing its state

B.Changes the state of a substance without changing its temperature

C.Is lost through the compressor motor windings

D.Is measured by a thermometer at the evaporator outlet

Explanation: Latent heat is the heat absorbed or released during a change of state (such as boiling or condensing) while the temperature stays constant. Refrigeration relies on the large latent heat of vaporisation to move significant heat with a relatively small refrigerant mass.

10In a reverse-cycle (heat pump) air conditioner, which component changes the direction of refrigerant flow to switch between heating and cooling?

A.Thermostatic expansion valve

B.Reversing (four-way) valve

C.Accumulator

D.Solenoid liquid valve

Explanation: The reversing valve, also called a four-way valve, redirects discharge and suction gas so the indoor and outdoor coils swap roles. In cooling the indoor coil is the evaporator; in heating the four-way valve reverses flow so it becomes the condenser.

About the Cert III Air Conditioning & Refrigeration Practice Questions

Verified exam format metadata for Certificate III in Air-Conditioning and Refrigeration (UEE32220) is pending. The practice questions above remain available while official exam length, timing, passing score, fee, and administrator details are reviewed.

100+ Free Cert III Air Conditioning & Refrigeration Practice Questions

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Key Facts: Cert III Air Conditioning & Refrigeration Exam

Sample Cert III Air Conditioning & Refrigeration Practice Questions

About the Cert III Air Conditioning & Refrigeration Practice Questions