NYC Refrigeration License Exam I
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.
NYC Refrigeration License Exam I
The efficiency of the refrigerant cycle is affected by the operation of the
condenser. Of the following, a more efficient centrifugal compressor operation
results from:
Lowering the condenser pressure
The heat removed from the refrigerant in a condenser is:
Sensible and latent heat
The refrigerant unit that you have been assigned to is being taken out of service
for a major repair. You have been assigned to withdraw refrigerant for storage in
suitable containers. According to the New York City fire code, you must ensure
the containers:
Are approved by the US Department of Transportation
Which of the following best describes how the cylinder unloader works?
Keep the suction valve opened while the compressor is in the return stroke
In most semi hermetic compressors, the suction vapor is used to:
Cools the motor
The amount of refrigerant that flows through the orifices of an economizer is
determined by the:
Difference between the high side and low side pressure
The installation of an inline refrigerant cleaning system is advisable:
To remove impurities from the system
The type of refrigerant system that is least likely to leak refrigerant into the
building space that are being cooled:
,The indirect system
The suction pressure of a reciprocating compressor is 65 PSIG. The discharge
pressure is 120 PSIG. The atmospheric is 14.7 PSI. The compression ratio for the
given condition is closest to:
1.69
A superheated vapor is a:
Dry vapor above the saturation temperature
A refrigerant engineer verifies that a condenser water pump is cavitating. Of the
following the most likely cause for this condition is:
A faulty cooling tower water level controller
A centrifugal water pump is known as a lift pump when the:
The water supply to the pump suction inlet is below the pump level
A TXV is used to maintain constant:
Evaporator superheat
The chilled water supply to the building is 55F. If the chiller is being used for
human comfort, should you be concerned about this and why?
Yes, this temperature is too high for human comfort purposes
The packing gland of a centrifugal pump serves to:
The drip part of the packing gland gives evidence that there is water in the pump
Capacity control of a reciprocating hermetic compressor is typically achieved
through
Operation of the hot gas bypass valve
The most important reason to sub-cool the refrigerant in the condenser is to
ensure that:
A pure liquid refrigerant will enter the metering device
A refrigeration engineer is logging reading from a reciprocating system.
Compressor discharge temperature have dropped significantly and the suction
line pressure is high. Which of the following that may be causing this set of
condition?
An expansion valve that is open to wide
A low side float valve is used to maintain:
The level of the refrigerant in the evaporator
Regarding fire safety, which ASHRAE refrigerant safety classification indicated
no flammability and lower toxicity?
A1
When an expansion valve is operating properly, at the end of the evaporator will
contain:
Only superheated vapor
What information is not contained in a Material Safety Data Sheet-MSDS?
Cost of the material
In a steam turbine, what is the function of the Kingsbury thrust bearing?
Maintain axial positioning of the rotor shaft
A centrifugal water pump is considered to be fully primed when
The pump is full of liquid
, Copper tubing refrigerant lines must be installed for a new system. It is a well
known service practice that tubing collapses at bends that must be made, the
refrigerant engineer should use
A lever type tubing bender
A reciprocating compressor is making a knocking sound during operation. If the
refrigerant worn parts are not causing the knocking, what is probably the cause:
The slugging of the liquid refrigerant
In order for a refrigerant to become superheated it must be heated in a section of
the low side refrigerant line:
Where no liquid refrigerant is present
All liquid has been recovered from a system to be overhauled, the system
Should not be opened until all vapor has been recovered
You are the engineer running a 2000-ton (steam-driven turbine) centrifugal
refrigeration system, a refrigeration system supplies chilled water to a college
campus with multiple buildings.
During the course of making your rounds, you check the 9 cell cooling tower on
the roof. You note the water level in all of the cooling tower cells is very low.
Which one of the following immediate action would take?
Gradually lower the chiller water set point on the refrigerant system
A rooftop water cooling tower is connected to a water pump in the building
basement with a 12 inches diameter pipe, with the pump turn off, a pressure
gauge at the pumps inlet shows a pressure of 140 PSIG, the height of the water
column, in feet, would be closest to.
323
What device protects the steam turbine from excessive speed?
Governor assembly
A refrigeration compressor has failed to turn on. The refrigeration engineer on
duty verifies that the electrical circuit to the motor, including all switches and
circuit breakers, is complete according to recommended service practice, the
next item to be checked would likely be the:
Temperature and pressure controls
Refrigerants are characterized by their physical properties included flashpoint,
refrigeration effect, and others. Of the refrigerants in commercial and industrial
the highest latent heat and refrigerant effect is:
Ammonia
On what characteristics is ASHRAE refrigerant safety group classification
system:
Flammability and toxicity
Of the following, an example of an in-line refrigerant cleaning system that may be
used with a centrifugal compressor containing R123 refrigerant is:
Refrigerant recycling
Information about the physical and chemical properties of a hazardous material
can be found in:
Material Safety Data Sheet
What is the function of the turbine auxiliary oil pump?
Establish oil pressure during turbine start up
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.
NYC Refrigeration License Exam I
The efficiency of the refrigerant cycle is affected by the operation of the
condenser. Of the following, a more efficient centrifugal compressor operation
results from:
Lowering the condenser pressure
The heat removed from the refrigerant in a condenser is:
Sensible and latent heat
The refrigerant unit that you have been assigned to is being taken out of service
for a major repair. You have been assigned to withdraw refrigerant for storage in
suitable containers. According to the New York City fire code, you must ensure
the containers:
Are approved by the US Department of Transportation
Which of the following best describes how the cylinder unloader works?
Keep the suction valve opened while the compressor is in the return stroke
In most semi hermetic compressors, the suction vapor is used to:
Cools the motor
The amount of refrigerant that flows through the orifices of an economizer is
determined by the:
Difference between the high side and low side pressure
The installation of an inline refrigerant cleaning system is advisable:
To remove impurities from the system
The type of refrigerant system that is least likely to leak refrigerant into the
building space that are being cooled:
,The indirect system
The suction pressure of a reciprocating compressor is 65 PSIG. The discharge
pressure is 120 PSIG. The atmospheric is 14.7 PSI. The compression ratio for the
given condition is closest to:
1.69
A superheated vapor is a:
Dry vapor above the saturation temperature
A refrigerant engineer verifies that a condenser water pump is cavitating. Of the
following the most likely cause for this condition is:
A faulty cooling tower water level controller
A centrifugal water pump is known as a lift pump when the:
The water supply to the pump suction inlet is below the pump level
A TXV is used to maintain constant:
Evaporator superheat
The chilled water supply to the building is 55F. If the chiller is being used for
human comfort, should you be concerned about this and why?
Yes, this temperature is too high for human comfort purposes
The packing gland of a centrifugal pump serves to:
The drip part of the packing gland gives evidence that there is water in the pump
Capacity control of a reciprocating hermetic compressor is typically achieved
through
Operation of the hot gas bypass valve
The most important reason to sub-cool the refrigerant in the condenser is to
ensure that:
A pure liquid refrigerant will enter the metering device
A refrigeration engineer is logging reading from a reciprocating system.
Compressor discharge temperature have dropped significantly and the suction
line pressure is high. Which of the following that may be causing this set of
condition?
An expansion valve that is open to wide
A low side float valve is used to maintain:
The level of the refrigerant in the evaporator
Regarding fire safety, which ASHRAE refrigerant safety classification indicated
no flammability and lower toxicity?
A1
When an expansion valve is operating properly, at the end of the evaporator will
contain:
Only superheated vapor
What information is not contained in a Material Safety Data Sheet-MSDS?
Cost of the material
In a steam turbine, what is the function of the Kingsbury thrust bearing?
Maintain axial positioning of the rotor shaft
A centrifugal water pump is considered to be fully primed when
The pump is full of liquid
, Copper tubing refrigerant lines must be installed for a new system. It is a well
known service practice that tubing collapses at bends that must be made, the
refrigerant engineer should use
A lever type tubing bender
A reciprocating compressor is making a knocking sound during operation. If the
refrigerant worn parts are not causing the knocking, what is probably the cause:
The slugging of the liquid refrigerant
In order for a refrigerant to become superheated it must be heated in a section of
the low side refrigerant line:
Where no liquid refrigerant is present
All liquid has been recovered from a system to be overhauled, the system
Should not be opened until all vapor has been recovered
You are the engineer running a 2000-ton (steam-driven turbine) centrifugal
refrigeration system, a refrigeration system supplies chilled water to a college
campus with multiple buildings.
During the course of making your rounds, you check the 9 cell cooling tower on
the roof. You note the water level in all of the cooling tower cells is very low.
Which one of the following immediate action would take?
Gradually lower the chiller water set point on the refrigerant system
A rooftop water cooling tower is connected to a water pump in the building
basement with a 12 inches diameter pipe, with the pump turn off, a pressure
gauge at the pumps inlet shows a pressure of 140 PSIG, the height of the water
column, in feet, would be closest to.
323
What device protects the steam turbine from excessive speed?
Governor assembly
A refrigeration compressor has failed to turn on. The refrigeration engineer on
duty verifies that the electrical circuit to the motor, including all switches and
circuit breakers, is complete according to recommended service practice, the
next item to be checked would likely be the:
Temperature and pressure controls
Refrigerants are characterized by their physical properties included flashpoint,
refrigeration effect, and others. Of the refrigerants in commercial and industrial
the highest latent heat and refrigerant effect is:
Ammonia
On what characteristics is ASHRAE refrigerant safety group classification
system:
Flammability and toxicity
Of the following, an example of an in-line refrigerant cleaning system that may be
used with a centrifugal compressor containing R123 refrigerant is:
Refrigerant recycling
Information about the physical and chemical properties of a hazardous material
can be found in:
Material Safety Data Sheet
What is the function of the turbine auxiliary oil pump?
Establish oil pressure during turbine start up
