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Exam Review

Key Facts: HVAC Excellence Exam

10

Professional Level Exams

HVAC Excellence (ESCO Group)

100

Questions Per Exam

HVAC Excellence (ESCO Group)

2 years

Verified Field Experience Required

HVAC Excellence (ESCO Group)

CORE

Prerequisite Exam for All Others

HVAC Excellence (ESCO Group)

Closed-book

Written Exam Format

HVAC Excellence (ESCO Group)

HVAC Excellence Professional Level certification is not one exam. It is a group of 10 discipline-specific, closed-book written exams of 100 questions each, including CORE, Gas Heat, Electric Heat, Heat Pump Service, and Residential Air Conditioning. Candidates need two years of verified field experience, and the CORE exam is a prerequisite for the rest. HVAC Excellence does not publish a passing score, time limit, fee, validity period, or retake rule for these exams.

Sample HVAC Excellence Practice Questions

Try these sample questions to review concepts for the HVAC Excellence exam. Each question includes a detailed explanation. Start the interactive quiz above for the full 152+ question experience with AI tutoring.

1In a standard electrical circuit, what does the term 'voltage' represent?
A.The rate of flow of electric charge
B.The opposition to the flow of electric charge
C.The electrical potential difference between two points
D.The amount of power consumed by the circuit
Explanation: Voltage is the pressure from an electrical circuit's power source that pushes charged electrons (current) through a conducting loop, enabling them to do work such as illuminating a light. In brief, voltage = pressure.
2Which of the following refrigerants has the highest Ozone Depletion Potential (ODP)?
A.R-410A
B.R-134a
C.R-22
D.R-717 (Ammonia)
Explanation: R-22 is an HCFC refrigerant, which contains chlorine and has a high ODP. R-410A and R-134a are HFCs with no ODP, and R-717 is a natural refrigerant with no ODP.
3What is the primary function of a capacitor in an HVAC system's motor circuit?
A.To increase the voltage to the motor
B.To provide starting torque and improve running efficiency
C.To protect the motor from overheating
D.To decrease the resistance of the motor windings
Explanation: A capacitor is used to create a phase shift in the start winding of a single-phase motor, which provides the necessary starting torque. Run capacitors are also used to improve the motor's running efficiency.
4In a gas furnace, what is the purpose of the limit switch?
A.To prove that the draft inducer motor is running
B.To shut off the gas valve if the flame is not detected
C.To turn the blower motor on and off based on plenum temperature
D.To prevent the furnace from overheating by shutting off the burners
Explanation: The high limit switch is a safety device that monitors the temperature inside the furnace plenum. If the temperature exceeds a preset limit, it opens the circuit to the gas valve, shutting off the burners to prevent overheating.
5According to the principles of psychrometrics, what happens to the relative humidity of air when it is heated without adding moisture?
A.It increases
B.It decreases
C.It remains the same
D.It depends on the initial temperature
Explanation: When air is heated, its capacity to hold moisture increases. If no moisture is added, the relative humidity (the amount of moisture in the air compared to the maximum it can hold at that temperature) will decrease.
6What is the primary purpose of the evaporator coil in a direct expansion (DX) refrigeration system?
A.To reject heat from the refrigerant
B.To absorb heat from the surrounding air or water
C.To increase the pressure of the refrigerant
D.To meter the flow of refrigerant into the compressor
Explanation: The evaporator coil is where the refrigerant boils at a low temperature, absorbing heat from the space or product being cooled. This is the primary cooling effect of the refrigeration cycle.
7A technician measures a current draw of 0 amps on the common wire to a compressor. The contactor is pulled in, and voltage is present at the compressor terminals. What is the most likely fault?
A.A failed run capacitor
B.A grounded compressor winding
C.An open compressor winding
D.A stuck compressor
Explanation: If there is voltage at the compressor terminals but no current draw, it indicates an open circuit within the compressor motor windings. The motor cannot draw any current because the path is broken.
8When installing a new residential split-system air conditioner, what is the most critical step after brazing the line set?
A.Charging the system with refrigerant
B.Performing a thorough evacuation of the system
C.Wiring the thermostat
D.Turning on the power to the condenser
Explanation: After brazing, a thorough evacuation of the system is critical to remove non-condensables like air and moisture. This ensures the system operates efficiently and prevents damage to the compressor.
9According to Ohm's Law, what is the current in a purely resistive circuit with 240 V applied across a 40 ohm load?
A.4 amps
B.6 amps
C.8 amps
D.10 amps
Explanation: I = E/R = 240 V / 40 Ω = 6 A. Ohm's Law relates voltage, current, and resistance in a purely resistive circuit.
10What does a megohmmeter (megger) primarily measure on a compressor motor?
A.Running amperage under load
B.Insulation resistance to ground
C.Capacitor microfarad rating
D.Contactor coil voltage drop
Explanation: A megger applies a high DC test voltage and measures insulation resistance (typically in megohms) between windings and ground to detect moisture or insulation breakdown.

About the HVAC Excellence Exam

HVAC Excellence Professional Level Technician Certifications are a group of 10 discipline-specific, closed-book written exams for experienced HVACR technicians. Each exam has 100 questions. Two years of verified field experience is required, and the CORE exam (Principles of Electrical and Refrigeration Theory) is a prerequisite for all other Professional Level exams.

Exam sponsor: HVAC Excellence (managed by ESCO Institute). The requirements and fees below concern the certification or admission exam, separate from our free practice resources.

Questions

100 questions

Time Limit

Not published by HVAC Excellence (ESCO Institute)

Passing Score

Not published by HVAC Excellence (ESCO Institute)

Exam / Certification Fees

Not published by HVAC Excellence (ESCO Institute)

Exam sponsor website

Reported exam pass rate: Not published. HVAC Excellence does not publish pass rate data. Exam sponsor website

Fees, eligibility, and exam policies can change. Confirm them with the exam sponsor before applying or paying.

Our practice resources: topics covered

We aim to reflect publicly available exam outlines and topic information in our study resources. Coverage, format, and difficulty may differ from the actual exam, and we cannot guarantee that every detail is accurate or current. Confirm exam requirements, fees, and policies with the official exam sponsor.

Not published

Electrical Systems

Electrical theory, components, safety, and troubleshooting

Not published

Refrigeration Principles

Refrigerant handling, thermodynamics, and system components

Not published

Heating Systems

Gas, oil, and electric furnaces, plus heat pumps

Not published

Air Distribution and IAQ

Ductwork, fans, filtration, and ventilation

Not published

System Installation and Service

Safety, regulations, and troubleshooting

Preparing for the HVAC Excellence Exam

What You Need to Know

  • Passing score: Not published by HVAC Excellence (ESCO Institute)
  • Exam length: 100 questions
  • Time limit: Not published by HVAC Excellence (ESCO Institute)
  • Exam / certification fees: Not published by HVAC Excellence (ESCO Institute) Official sources

Using Our Practice Resources

  • Work through all 152 available questions
  • Review every answer and explanation
  • Track weak areas and revisit them
  • Use our AI tutor for tough concepts

HVAC Excellence: Suggested Study Strategy

1Memorize the refrigeration cycle and be able to explain what is happening at each point.
2Practice reading wiring diagrams and understanding electrical symbols.
3Understand the sequence of operations for different types of furnaces.
4Know the difference between superheat and subcooling and how to use them to diagnose system problems.
5Review safety procedures, especially those related to electrical work and refrigerant handling, because safety appears in the CORE exam and several discipline exams.

Frequently Asked Questions

How many questions are on the HVAC Excellence exam?

Each HVAC Excellence Professional Level written exam has 100 questions. There are 10 discipline-specific, closed-book exams, including the CORE exam, Principles of Electrical and Refrigeration Theory. HVAC Excellence does not publish a time limit for them.

What is the passing score for the HVAC Excellence exam?

HVAC Excellence does not publish a passing score for its Professional Level exams on its official certification page. Confirm the current passing standard with your proctor or with ESCO Institute before you test.

What are the prerequisites for HVAC Excellence Professional Level exams?

HVAC Excellence requires two years of verified field experience before taking Professional Level exams. The CORE exam, Principles of Electrical and Refrigeration Theory, is a prerequisite for all other Professional Level exams.

Which HVAC Excellence Professional Level exams are offered?

The 10 exams are CORE (Principles of Electrical and Refrigeration Theory), Combustion Analysis, Electric Heat, Gas Heat, Heat Pump Installer, Heat Pump Service, Light Commercial Air Conditioning, Light Commercial Refrigeration, Residential Air Conditioning, and Residential & Light Commercial Hydronic Heat.

What topics are covered on the HVAC Excellence exams?

The CORE exam covers safety, theory, components, meter usage, motors and capacitors, electrical diagrams, and troubleshooting. The discipline exams cover topics such as combustion theory, heat pump cycles, airflow, installation, service, and charging. HVAC Excellence publishes a competency and task list but no topic percentages.

How much does the HVAC Excellence exam cost, and how long is it valid?

HVAC Excellence does not publish a fee, validity period, or retake rule for Professional Level exams on its official certification page. Ask your proctor or testing organization for the current price and policies.