100+ Free HVAC Excellence Master HP Practice Questions

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2026 Statistics

Key Facts: HVAC Excellence Master HP Exam

100 questions

The professional-level Heat Pump written examination is a 100-question closed-book multiple-choice test

HVAC Excellence - Professional Technician Certifications

70%

Minimum score generally required to pass HVAC Excellence professional-level written exams

HVAC Excellence certification guides

3 years

Minimum field experience required to sit for a Master Specialist certification

HVAC Excellence - Master Specialist Certifications

Closed-book

HVAC Excellence professional-level technician exams are closed-book written examinations

HVAC Excellence - Professional Technician Certifications

Written + hands-on

The Master Specialist title requires passing both a written exam and a hands-on performance test

HVAC Excellence - Master Specialist Certifications

Up to 30 tons

The Heat Pump certification covers systems with cooling capacity up to about 30 tons

HVAC Excellence certification guides

ESCO Group

HVAC Excellence is a division of the ESCO Group, which administers the certifications

HVAC Excellence (ESCO Group)

100

Free original master-level practice questions provided here

OpenExamPrep

The HVAC Excellence Master Specialist - Heat Pumps exam is an advanced credential for experienced technicians, pairing a 100-question, closed-book, multiple-choice written examination with a separate hands-on performance test. A minimum of 70% is generally required to pass the written portion, and candidates need at least 3 years of field experience plus a professional-level HVAC Excellence certification (or NATE/RSES/UA STAR equivalent) to qualify. The written exam covers the reversing refrigeration cycle and components, defrost systems and controls, charging and airflow, capacity versus outdoor temperature with COP/HSPF/SEER, thermostat sequence of operation (O/B, auxiliary and emergency heat), geothermal and dual-fuel basics, and electrical troubleshooting. HVAC Excellence is a division of the ESCO Group. This 100-question bank provides original master-level multiple-choice practice across all of these areas.

Sample HVAC Excellence Master HP Practice Questions

Try these sample questions to test your HVAC Excellence Master HP exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1On a standard residential air-source heat pump that uses an O-terminal thermostat, when is the reversing-valve solenoid coil energized?

A.In heating mode only

B.In cooling mode only

C.Whenever the compressor runs

D.Only during defrost in heating mode... but never in cooling

Explanation: On an O-terminal system the reversing valve solenoid is energized in the cooling mode. Most U.S. residential heat pumps default to heating with the valve de-energized, and the thermostat energizes O when cooling is called. During defrost the system also energizes the valve to shift into cooling momentarily.

2What is the primary purpose of the suction-line accumulator in a heat pump?

A.To increase subcooling at the condenser

B.To prevent liquid refrigerant from flooding back to the compressor

C.To meter refrigerant into the evaporator

D.To store excess oil away from the system

Explanation: The suction-line accumulator traps liquid refrigerant during operation and especially at mode changes, allowing only vapor (and metered oil) to return to the compressor. This protects the compressor from liquid slugging, which is more likely in a heat pump because the evaporator role shifts between coils.

3In heating mode, which coil of an air-source heat pump acts as the evaporator?

A.The indoor coil

B.The outdoor coil

C.Both coils equally

D.Neither coil; the accumulator evaporates the refrigerant

Explanation: In heating mode the outdoor coil absorbs heat from outdoor air and therefore acts as the evaporator, while the indoor coil rejects heat into the home and acts as the condenser. The reversing valve swaps these roles in cooling mode.

4A heat pump has a measured heating output of 30,000 Btu/h while drawing 3,000 watts of electrical power. What is its coefficient of performance (COP)?

A.1.0

B.2.93

C.3.41

D.10.0

Explanation: COP equals heat output divided by energy input in the same units. 3,000 W equals 3,000 x 3.412 = 10,236 Btu/h. COP = 30,000 / 10,236 = 2.93. Equivalently, COP = (30,000 / 3,412) / 3 = 2.93.

5The point at which a heat pump's heating capacity exactly equals the building's heat loss is called the:

A.Balance point

B.Bivalent point

C.Dew point

D.Setpoint

Explanation: The balance point is the outdoor temperature at which the heat pump's declining heating capacity just equals the building's rising heat-loss demand. Below the balance point, supplemental heat is required because the heat pump alone can no longer keep up.

6Why does an air-source heat pump's heating capacity decrease as the outdoor temperature drops?

A.The compressor speeds up at low temperatures

B.The outdoor coil has less heat available to absorb and refrigerant density falls

C.The indoor blower slows automatically

D.The reversing valve partially closes

Explanation: As outdoor air gets colder, there is less heat available for the outdoor coil to absorb, and the suction pressure and refrigerant vapor density drop, reducing mass flow through the compressor. Both effects lower the heating capacity delivered indoors, which is why building load and heat-pump output eventually cross at the balance point.

7During a defrost cycle on an air-source heat pump, the system normally:

A.Shuts the compressor off and runs only the outdoor fan

B.Reverses into cooling, stops the outdoor fan, and energizes auxiliary heat

C.Runs in heating with the outdoor fan on high

D.Closes the indoor damper to trap heat

Explanation: To melt frost, the control reverses the system into cooling so hot refrigerant flows to the outdoor coil, stops the outdoor fan so heat is not blown away, and energizes auxiliary electric heat to temper the cold air delivered indoors. When the coil clears, the system returns to heating.

8A demand-defrost control initiates a defrost cycle based on:

A.A fixed time clock only

B.Measured conditions such as coil temperature and run time that indicate actual frost

C.Indoor humidity readings

D.The position of the reversing valve

Explanation: Demand defrost monitors actual conditions, such as outdoor coil temperature versus ambient and accumulated run time or air-temperature differential, and defrosts only when frost is genuinely present. This avoids unnecessary cycles, improving efficiency compared with simple time-and-temperature defrost.

9What component allows a single thermostatic expansion valve assembly to meter correctly in one direction while letting refrigerant bypass it in the other direction of flow?

A.A bi-flow filter-drier

B.A check valve piped in parallel with the TXV

C.A crankcase heater

D.A hard-shutoff solenoid

Explanation: A check valve is piped in parallel with each TXV so that when flow is in the metering direction the check valve is closed and the TXV controls it, but when flow reverses the check valve opens and lets refrigerant bypass that TXV to the metering device at the other coil. This lets each coil be metered correctly in its evaporator mode.

10Which efficiency rating describes the seasonal heating performance of an air-source heat pump?

A.SEER2

B.EER

C.HSPF2

D.AFUE

Explanation: HSPF (and the current HSPF2) is the Heating Seasonal Performance Factor, expressing total seasonal heating output in Btu divided by total electrical input in watt-hours over a heating season. SEER/SEER2 rate seasonal cooling, and AFUE rates fossil-fuel furnaces.

About the HVAC Excellence Master HP Exam

The HVAC Excellence Master Specialist - Heat Pumps credential certifies experienced technicians on the installation, service, maintenance and repair of air-source, water-source/geothermal and dual-fuel heat pump systems. It pairs a closed-book, multiple-choice professional-level written examination with a hands-on performance test. Candidates must have a minimum of three years of field experience and already hold a professional-level HVAC Excellence certification (or an accepted NATE, RSES or UA STAR equivalent). The written exam covers heat-pump theory and the reversing refrigeration cycle, the reversing valve and supporting components, defrost systems and controls, charging and airflow, capacity versus outdoor temperature and efficiency (COP, HSPF, SEER), thermostats and sequence of operation including O/B terminals and auxiliary/emergency heat, geothermal basics, and electrical troubleshooting. HVAC Excellence is a division of the ESCO Group.

Assessment

Professional-level Heat Pump written examination: 100 closed-book multiple-choice questions covering heat-pump theory, the reversing cycle and components, defrost, charging and airflow, controls and sequence of operation, geothermal basics, dual-fuel systems and troubleshooting. The Master Specialist title also requires a separate hands-on performance test.

Time Limit

The closed-book written examination is typically completed in a proctored session of about 2 hours; the hands-on Master Specialist performance evaluation is scheduled separately and can take 4 to 6 hours.

Passing Score

A minimum score of 70% is generally required to pass the written examination. To earn the Master Specialist credential, candidates must pass both the written exam and the hands-on performance test.

Exam Fee

Fees are set by HVAC Excellence and the Master Specialist testing center; contact HVAC Excellence (ESCO Group) at 800-394-5268 for current written and hands-on fees. No single flat fee is published. (HVAC Excellence (a division of the ESCO Group))

HVAC Excellence Master HP Exam Content Outline

22%

Reversing Cycle and Components

The reversing refrigeration cycle in heating and cooling modes; reversing (four-way) valve and solenoid operation including which mode is energized; the suction-line accumulator; the bi-flow filter-drier; check valves; and metering devices (TXV with check valve, or pistons/orifices) that must control refrigerant flow in both directions.

18%

Defrost Systems and Controls

How frost forms on the outdoor coil; demand defrost versus time-and-temperature defrost; defrost boards, controls and sensors; defrost initiation and termination conditions; reversing the system into cooling and energizing auxiliary heat and stopping the outdoor fan during defrost.

20%

Capacity, Charging and Airflow

Heating capacity falling as outdoor temperature drops; the balance point where heat-pump output equals building load; COP, HSPF and SEER as efficiency ratings; charging by subcooling or superheat to the manufacturer chart and the effect of outdoor temperature; and required indoor airflow (about 400 CFM per ton) to prevent coil problems.

20%

Controls and Sequence of Operation

Heat-pump versus conventional thermostats; O versus B reversing-valve terminals (O energizes in cooling, B energizes in heating); two-stage and outdoor thermostats; supplemental/auxiliary electric heat staging; emergency heat operation; and outdoor-temperature lockouts for the compressor and strip heat.

20%

Geothermal, Dual-Fuel and Troubleshooting

Water-source/geothermal loop types (open vs closed, horizontal/vertical) and water flow and COP; dual-fuel/hybrid systems that switch between the heat pump and a fossil-fuel furnace; and electrical troubleshooting of the compressor, reversing-valve coil, defrost board, refrigerant charge problems and auxiliary heat faults.

How to Pass the HVAC Excellence Master HP Exam

What You Need to Know

Passing score: A minimum score of 70% is generally required to pass the written examination. To earn the Master Specialist credential, candidates must pass both the written exam and the hands-on performance test.
Assessment: Professional-level Heat Pump written examination: 100 closed-book multiple-choice questions covering heat-pump theory, the reversing cycle and components, defrost, charging and airflow, controls and sequence of operation, geothermal basics, dual-fuel systems and troubleshooting. The Master Specialist title also requires a separate hands-on performance test.
Time limit: The closed-book written examination is typically completed in a proctored session of about 2 hours; the hands-on Master Specialist performance evaluation is scheduled separately and can take 4 to 6 hours.
Exam fee: Fees are set by HVAC Excellence and the Master Specialist testing center; contact HVAC Excellence (ESCO Group) at 800-394-5268 for current written and hands-on fees. No single flat fee is published.

Keys to Passing

Complete 500+ practice questions
Score 80%+ consistently before scheduling
Focus on highest-weighted sections
Use our AI tutor for tough concepts

HVAC Excellence Master HP Study Tips from Top Performers

1Master the reversing valve: know that the solenoid is energized in cooling on an O-terminal system, that the valve pilots off the pressure difference, and that a stuck valve or bad coil is a classic no-heat or no-cool fault.

2Trace the refrigerant path in both modes. The accumulator protects the compressor on the suction line, the bi-flow drier and check valves redirect flow, and the metering device must control flow in whichever direction the cycle is running.

3Practice balance-point and capacity-versus-temperature problems: heating output drops as outdoor temperature falls, and where the output line crosses the building heat-loss line is the balance point that sets when auxiliary heat is needed.

4Know the efficiency ratings cold: COP is unitless output/input, HSPF rates seasonal heating, and SEER/SEER2 rates seasonal cooling. Be able to convert COP to and from Btu/Wh.

5Study defrost logic: demand defrost uses sensors and runs only when needed, time-and-temperature defrost runs on a clock plus coil temperature, and during defrost the system reverses to cooling, energizes auxiliary heat and stops the outdoor fan.

6Drill the sequence of operation for supplemental, auxiliary and emergency heat, including outdoor thermostats and lockouts, so you can troubleshoot high bills, frozen coils and no-heat calls quickly.

Frequently Asked Questions

How many questions are on the HVAC Excellence Heat Pump written exam?

The professional-level Heat Pump written examination is a 100-question, closed-book, multiple-choice test. The Master Specialist title also requires passing a separate hands-on performance test.

What score do I need to pass?

A minimum score of 70% is generally required to pass HVAC Excellence professional-level written examinations. For the Master Specialist credential you must also pass the hands-on performance evaluation.

What are the prerequisites for the Master Specialist - Heat Pumps exam?

You need a minimum of 3 years of field experience and a passing professional-level HVAC Excellence certification (or an accepted NATE, RSES CM/SM/CMS, or UA STAR equivalent) before sitting the Master Specialist exam.

Is the exam open-book?

No. HVAC Excellence professional-level technician examinations, including Heat Pumps, are closed-book, comprehensive written exams taken in a proctored setting.

What is the difference between the O and B thermostat terminals?

Both control the reversing valve. On an O-terminal system the reversing-valve solenoid is energized in cooling; on a B-terminal system it is energized in heating. Most U.S. residential heat pumps use the O terminal.

Are these official HVAC Excellence or ESCO questions?

No. These are original OpenExamPrep questions written at the master/advanced level to mirror the official content areas. HVAC Excellence and the ESCO Institute provide their own official and free practice exams separately.

100+ Free HVAC Excellence Master HP Practice Questions

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