Refrigeration Exam Study Guide 2026
❄️ Complete Questions with Correct Detailed Answers |
Latest Version | High Pass Success
Get fully prepared for your Refrigeration Certification Exam with this comprehensive and
easy-to-follow study guide designed to help you understand key concepts and pass with
confidence.
This resource features complete exam questions with correct detailed answers, covering
essential refrigeration principles, system components, and troubleshooting techniques. Each
answer includes clear explanations to help you build real understanding—not just memorize
content.
🔥 Key Highlights
✔ Complete exam questions covering core refrigeration topics
✔ Correct answers with detailed, easy-to-understand explanations
✔ Covers system operation, maintenance, and safety procedures
✔ Real exam-style questions for effective practice
✔ Latest updated version (2026) for accurate preparation
🧊 Topics Covered
• Refrigeration cycles and principles
• Compressors, condensers, evaporators
• Refrigerants and environmental considerations
• System installation and maintenance
• Troubleshooting and fault diagnosis
• Safety standards and best practices
🚀 Why This Guide Works
,This study guide helps you simplify complex technical concepts, identify common exam
questions, and improve your problem-solving skills. It’s perfect for both beginners and
experienced technicians preparing for certification.
🎯 Ideal For
• Refrigeration certification exam candidates
• HVAC and refrigeration students
• Technicians seeking license or certification
• Exam revision and practice
• Improving technical knowledge and confidence
📚 A practical and reliable study resource designed to help you master refrigeration
concepts and pass your exam with confidence.
The temperature scale that freezes water at 32 deg. and boils water at 212 deg. is
known as the ___________ scale -ANSWER✅✅✅Fahrenheit
The temperature scale that freezes water at 0 deg. and boils water at 100 deg. is known
as the __________ scale. -ANSWER✅✅✅Centigrade
The definition of specific heat is _______________________ -ANSWER✅✅✅the
amount of heat required to raise 1 lb of a substance 1 deg. F.
The definition of sensible heat is ______ -ANSWER✅✅✅the heat that can be
measured by a thermometer.
The definition of latent heat is ______ -ANSWER✅✅✅the heat used which causes a
change of state
The definition of a BTU is ________ -ANSWER✅✅✅the amount of heat required to
raise 1 lb of water 1 deg. F
Heat energy is measured in _________ -ANSWER✅✅✅BTU
Three states of matter are _________ -ANSWER✅✅✅Solid, Liquid, and Gas
,One ton of refrigeration is equal to __________ -ANSWER✅✅✅12,000 btu per hour
____________ is the type of heat that is absorbed or extracted from a substance when
the substance changes state -ANSWER✅✅✅Latent Heat
When a substance changes from a liquid to a gas, this is known as
the________________ -ANSWER✅✅✅latent heat of vaporization
When a substance changes from a gas to a liquid, this is known as
the________________ -ANSWER✅✅✅latent heat of condensation.
When a substance changes from a solid to a gas, this is known as
the________________ -ANSWER✅✅✅the latent heat of sublimation
In a refrigeration system, heat is absorbed by ______________ -ANSWER✅✅✅the
latent heat of vaporization in the evaporator.
In a refrigeration system, heat is rejected by _________ -ANSWER✅✅✅the latent
heat of condensation in the condenser.
Frost is -ANSWER✅✅✅adsorbed by the evaporator
The relationship of absolute pressure on the low side to the absolute pressure on the
high side is called the ___________ -ANSWER✅✅✅compression ratio
________________________________ Is called the refrigerating effect -
ANSWER✅✅✅The amount of heat absorbed by the refrigerant used
Generally speaking the ____________________ is the type of system that gives the
greatest rate of heat transfer -ANSWER✅✅✅flooded evaporator
________________ the total amount of heat present in a given substance. -
ANSWER✅✅✅Enthalpy is
When hot air remains at the top of a room and cold air at the bottom you will have an
occurrence of a condition known as ___________ -ANSWER✅✅✅stratified air.
The ____ State of a substance will have the highest heat content. -
ANSWER✅✅✅vapor
One cubic foot of air at 50 deg F can absorb _____________ -ANSWER✅✅✅less
moisture than it could at 100 deg. F.
A Baudelot cooler ________________ -ANSWER✅✅✅is a heat exchanger
, When placed in a bucket of water, the refrigeration effect of 32 deg F. Ice will always be
______________ -ANSWER✅✅✅144 btu per pound.
____________________________ Is called the ambient temperature. -
ANSWER✅✅✅The temperature of the air that surrounds any object
The highest temperature at which vapor can be liquified regardless of the pressure
applied is called ___________________ -ANSWER✅✅✅the critical temperature of a
substance.
The critical pressure of a substance is the pressure at which ____________ -
ANSWER✅✅✅a liquid cannot become a vapor by adding heat.
The boiling point of water ______________ when salt is added -
ANSWER✅✅✅increases
Heat travels in accordance with the __________________ -ANSWER✅✅✅second law
of thermodynamics.
One degree day is __________________________ -ANSWER✅✅✅computed by
taking the average of the highest and lowest temperatures recorded for a given day and
subtracting it from 65 deg. F
The term "Volumetric Efficiency" is the ___________________ -ANSWER✅✅✅actual
volume of vapor pumped divided by the calculated volume.
Refrigerant having either Chorine or Fluorine __________________ when in contact
with flame. -ANSWER✅✅✅can break down to phosgene
Absolute pressure is _____________ -ANSWER✅✅✅Gauge pressure plus 15
___________ must not be used in any refrigeration system that contains halogenated
refrigerant. -ANSWER✅✅✅Magnesium
Pressure vessels having a maximum design pressure of 15 psig must be strong enough
to ________________ -ANSWER✅✅✅withstand at least 3 times the design pressure
and be tested to 1 1/3 times pressure for which they are rated.
The minimum design pressure for a refrigeration system can not be less than
____________ -ANSWER✅✅✅15 psig