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100+ Free RSES CMS Heat Pumps Practice Questions

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2026 Statistics

Key Facts: RSES CMS Heat Pumps Exam

100

Exam Questions

RSES

80%

Passing Score

RSES

$35

Exam Fee

RSES

CM required

Prerequisite

RSES

1 of 8

CMS Specialty Exams

RSES

100

Free Practice Questions

OpenExamPrep

The RSES CMS Heat Pump Specialist exam is a Certificate Member Specialist (CMS) credential from the Refrigeration Service Engineers Society (RSES). The exam consists of 100 multiple-choice questions and requires a score of 80% or better to pass, with a fee of $35 per exam. It is open only to RSES Certificate Members (CM) in good standing. Content spans heat pump components and the four-way reversing valve, air-to-air heating/cooling and defrost cycles, supplemental, auxiliary and emergency heat, balance point, evacuation and charging, metering devices, water-source and geothermal heat pumps, electrical, motors, duct systems, and safety. This free prep includes 100 research-based practice questions with explanations and an AI tutor.

Sample RSES CMS Heat Pumps Practice Questions

Try these sample questions to test your RSES CMS Heat Pumps exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1In an air-to-air heat pump operating in the heating mode, which component absorbs heat from the outdoor air?
A.Indoor coil
B.Outdoor coil
C.Compressor
D.Reversing valve
Explanation: In heating mode the outdoor coil acts as the evaporator, absorbing low-temperature heat from outdoor air and boiling the refrigerant. The reversing valve then routes the hot discharge gas to the indoor coil, which acts as the condenser to release that heat indoors.
2What is the primary function of the four-way reversing valve in a heat pump?
A.To meter refrigerant into the evaporator
B.To reverse the direction of refrigerant flow so the system can both heat and cool
C.To remove non-condensable gases from the system
D.To regulate compressor oil return
Explanation: The four-way reversing valve switches the refrigerant flow path so that one coil can serve as the evaporator in one mode and the condenser in the other. This single valve is what allows a heat pump to provide both heating and cooling.
3The coefficient of performance (COP) of a heat pump in heating mode is best defined as the ratio of:
A.Heat output to electrical energy input
B.Electrical energy input to heat output
C.Sensible heat to latent heat
D.Cooling capacity to heating capacity
Explanation: COP equals useful heat output divided by the electrical energy input, both in the same units. A COP of 3 means three units of heat are delivered for every unit of electrical energy consumed, which is why heat pumps outperform electric resistance heat.
4On most air-source heat pumps the solenoid coil of the reversing valve is wired so that the valve is energized during which mode?
A.Heating mode
B.Cooling mode
C.Defrost mode only
D.It is never energized
Explanation: The most common manufacturer convention (including Carrier and many others) wires the reversing valve solenoid to be energized in cooling, so the valve de-energizes to the heating position on a power loss, leaving the customer with heat. During defrost the valve switches to the cooling (energized) position to send hot gas to the outdoor coil.
5During the defrost cycle of an air-to-air heat pump, what happens to the outdoor fan motor?
A.It runs at high speed to remove frost faster
B.It is stopped so the outdoor coil can warm up
C.It reverses rotation to blow warm air over the coil
D.It cycles on and off every few seconds
Explanation: During defrost the system shifts to the cooling cycle so hot discharge gas flows to the outdoor coil, and the outdoor fan is stopped. Stopping the fan prevents cold outdoor air from carrying heat away, letting the coil warm rapidly to melt the frost.
6The outdoor temperature 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.Design temperature
D.Dew point
Explanation: The balance point is the outdoor temperature where the heat pump's declining output curve intersects the building's rising heat-loss line. Below the balance point the heat pump alone cannot satisfy the load, so supplemental heat must make up the difference.
7Supplemental electric resistance heat on a heat pump is most commonly provided by:
A.A gas burner in the air handler
B.Electric heater strips (heating elements) in the indoor air handler
C.A secondary compressor
D.Increasing the outdoor fan speed
Explanation: Supplemental heat on a typical air-source heat pump is provided by electric resistance heater strips installed in the indoor air handler downstream of the indoor coil. They energize in stages when the heat pump cannot meet the load or during defrost to temper the supply air.
8What is the difference between auxiliary heat and emergency heat on a heat pump thermostat?
A.They are two names for the same thing
B.Auxiliary heat runs with the compressor; emergency heat replaces a failed compressor and runs the strips alone
C.Auxiliary heat is gas; emergency heat is electric
D.Emergency heat runs the compressor harder; auxiliary heat shuts it down
Explanation: Auxiliary heat energizes the electric strips automatically to assist the running compressor when capacity is short. Emergency heat is a manual setting that locks out the compressor entirely and heats with the resistance strips alone, used when the heat pump has failed.
9A water-source (geothermal) heat pump that circulates antifreeze solution through buried piping is referred to as a:
A.Open-loop system
B.Closed-loop system
C.Direct-expansion system
D.Standing column well
Explanation: A closed-loop geothermal system circulates a sealed water/antifreeze mixture through buried polyethylene piping; the fluid never contacts the ground or groundwater. Heat is exchanged through the pipe walls, and the same fluid recirculates continuously.
10Which metering device is commonly used on heat pumps because it can control refrigerant flow in both directions when paired with a check valve?
A.Capillary tube only
B.Fixed-orifice piston with a bypass check valve
C.Hand expansion valve
D.High-side float
Explanation: Heat pumps often use a fixed-orifice (piston) metering device at each coil that meters when refrigerant flows one way and lets a check feature bypass it in the reverse direction. Bi-flow TXVs accomplish the same with an internal check valve, allowing proper metering whichever coil is the evaporator.

About the RSES CMS Heat Pumps Exam

The RSES CMS Heat Pump Specialist exam is one of eight RSES Certificate Member Specialist (CMS) exams. It has 100 multiple-choice questions and requires a score of 80% or better to pass. It is open to RSES Certificate Members (CM) in good standing and covers heat pump components, air-to-air systems and defrost, supplemental heat, charging, water-source/geothermal systems, electrical, motors, ducts, and safety.

Assessment

100 multiple-choice questions, 80% required to pass; a proctored written specialist exam open to RSES Certificate Members. This practice bank is 100 selected-response items.

Time Limit

Proctored written exam (typically about 2-3 hours)

Passing Score

80%

Exam Fee

$35 per exam (RSES member) (Refrigeration Service Engineers Society (RSES))

RSES CMS Heat Pumps Exam Content Outline

16%

Heat Pump Components & Reversing Valve

Four-way reversing valve operation and wiring, accumulators, crankcase heaters, check valves, and bi-flow filter driers

14%

Air-to-Air Heat Pump Systems

Cycle reversal, coil function, low-ambient capacity loss, balance point, and supply-air temperature characteristics

12%

Air-to-Air Defrost

Time-temperature and demand defrost initiation/termination, outdoor fan action, frost formation, and defrost troubleshooting

10%

Supplemental, Auxiliary & Emergency Heat

Electric heat strips, sequencers, outdoor thermostats and staging, emergency vs auxiliary heat, and dual-fuel changeover

10%

Evacuation & Charging

Deep evacuation with a micron gauge, R-410A liquid charging, superheat/subcooling, weigh-in charging, recovery, and brazing

10%

Water-Source & Geothermal Heat Pumps

Open/closed loops, antifreeze, entering water temperature, loop flow, desuperheaters, EER/COP, and heat-exchanger fouling

10%

Electrical

Ohm's/Watt's laws, series and parallel circuits, thermostat terminals, contactors, defrost relays, and troubleshooting

8%

Motors

PSC and ECM blower motors, capacitors, potential relays and hard-start kits, three-phase scroll rotation, and fan motors

5%

Basic Refrigeration

Refrigeration cycle, latent/sensible heat, heat of compression, COP, pressure-temperature relationships, and R-410A pressures

5%

Duct Systems

Airflow per ton, total external static pressure, return/supply sizing, filtration, and duct insulation for cooler heat pump air

How to Pass the RSES CMS Heat Pumps Exam

What You Need to Know

  • Passing score: 80%
  • Assessment: 100 multiple-choice questions, 80% required to pass; a proctored written specialist exam open to RSES Certificate Members. This practice bank is 100 selected-response items.
  • Time limit: Proctored written exam (typically about 2-3 hours)
  • Exam fee: $35 per exam (RSES member)

Keys to Passing

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

RSES CMS Heat Pumps Study Tips from Top Performers

1Know the four-way reversing valve cold: which coil is the condenser vs evaporator in heating, cooling, and defrost, and the common convention that the valve is energized in cooling
2Memorize the balance point concept and how supplemental, auxiliary, and emergency heat differ and stage in
3Understand defrost initiation and termination: time-temperature vs demand defrost, the outdoor fan stopping, and strips tempering the supply air
4Practice charging logic: subcooling on TXV systems, superheat charts on fixed-orifice systems, and liquid-only charging of blended R-410A
5Review water-source/geothermal basics: open vs closed loop, antifreeze, entering water temperature, loop flow, and why geothermal needs no air-coil defrost
6Complete all 100 practice questions and review every miss with the AI tutor before sitting the 80%-to-pass exam

Frequently Asked Questions

How many questions are on the RSES CMS Heat Pump Specialist exam and what score do I need?

The RSES Heat Pump Specialist examination has 100 multiple-choice questions and requires a score of 80% or better to pass. It is one of eight RSES Certificate Member Specialist (CMS) exams.

How much does the RSES CMS Heat Pumps exam cost?

The cost for a CMS exam is $35 per test for RSES members. Candidates must also hold RSES Certificate Member (CM) status, which requires RSES membership.

Who is eligible to take the RSES CMS Heat Pump Specialist exam?

Any RSES Certificate Member (CM) in good standing may take the CMS Heat Pump Specialist exam. The CM exam (150 questions, 70% to pass) is the prerequisite for all CMS specialty exams.

What topics does the RSES Heat Pump Specialist exam cover?

Official categories include Basic Refrigeration, Heat Pump Components, Motors, Electrical, Evacuation and Charging, Duct Systems, Air-to-Air Heat Pump Systems, Air-to-Air Heat Pump Defrost, Supplemental Heat, Water-Source Heat Pumps, Safety, and miscellaneous topics.

Where can I take the RSES CMS Heat Pumps exam?

CMS exams are offered at local chapter test days, state or regional training events, international seminars, and the annual RSES conference. Contact your RSES chapter or check the RSES events calendar for dates.

Is this free RSES Heat Pump practice as good as paid prep?

Our 100 practice questions cover the same official categories as the RSES Heat Pump Specialist exam, with a teaching explanation for every answer plus free daily AI tutor interactions. All content is free forever and updated for 2026.