UTAH REFRIGERATION CONTRACTOR EXAM – QUESTIONS AND ANSWERS | VERIFIED AND
WELL DETAILED ANSWERS | PLUS RATIONALES | GUARANTEED PASS | LATEST EXAM
UPDATE
*Core Domains*
*• Thermodynamics and Heat Transfer*
*• Refrigerant Properties and Management*
*• System Components and Troubleshooting*
*• Electrical Theory and Control Circuits*
*• Utah State Laws and Administrative Rules*
*• Piping Standards and Braze Joints*
*• Safety, OSHA, and Environmental Compliance*
*• Load Calculations and Psychrometrics*
*Introduction*
*The purpose of this examination is to evaluate the technical proficiency and regulatory
knowledge required for licensure as a Refrigeration Contractor in the State of Utah. This
comprehensive assessment focuses on the skills necessary to design, install, maintain, and
repair various refrigeration systems while ensuring public safety and environmental
protection. The exam structure utilizes multiple-choice and scenario-based questions to
measure a candidate's mastery of foundational theory and real-world application. Emphasis
is placed on critical decision-making, precise load calculations, and strict adherence to the
Clean Air Act and Utah-specific administrative codes, ensuring all practitioners meet the
highest professional standards.*
SECTION ONE: QUESTIONS 1–100
1. What is the primary function of the evaporator in a vapor-compression refrigeration
cycle?
A. To reject heat to the surrounding air
B. To absorb heat from the refrigerated space
,C. To compress the refrigerant vapor
D. To regulate the flow of refrigerant
B. To absorb heat from the refrigerated space
Explanation: The evaporator serves as the heat exchanger where the low-pressure liquid
refrigerant evaporates, absorbing heat from the target area in the process.
2. In Utah, what is the maximum duration for which a temporary contractor's license
may be issued?
A. 30 days
B. 60 days
C. 90 days
D. 120 days
C. 90 days
Explanation: Under Utah administrative rules, temporary licenses are generally limited to
a 90-day period under specific emergency or transitional circumstances.
3. Which of the following refrigerants is classified as an HFO (Hydrofluoroolefin)?
A. R-22
B. R-134a
C. R-1234yf
D. R-410A
C. R-1234yf
Explanation: R-1234yf is a hydrofluoroolefin with low global warming potential, unlike
older HFCs or HCFCs.
4. A refrigeration system has a suction pressure of 76 psig and a suction line
temperature of 55°F. If the saturation temperature for the refrigerant at 76 psig is
45°F, what is the superheat?
A. 5°F
B. 10°F
C. 21°F
D. 131°F
, B. 10°F
Explanation: Superheat is calculated by subtracting the saturation temperature (45°F)
from the actual line temperature (55°F).
5. What is the required minimum height for a ladder to extend above a roof landing
according to OSHA standards?
A. 1 foot
B. 2 feet
C. 3 feet
D. 4 feet
C. 3 feet
Explanation: OSHA safety regulations require that ladder side rails extend at least 3 feet
above the upper landing surface to ensure safe transition.
6. Which component is responsible for preventing liquid refrigerant from entering the
compressor?
A. Oil separator
B. Filter drier
C. Receiver
D. Suction accumulator
D. Suction accumulator
Explanation: The suction accumulator is installed in the suction line to trap liquid
refrigerant and ensure only vapor enters the compressor, preventing slugging.
7. What is the effect of a dirty condenser coil on a refrigeration system?
A. Decreased head pressure
B. Increased suction pressure
C. Increased head pressure
D. Decreased power consumption
C. Increased head pressure
Explanation: Dirt acts as an insulator on the condenser coils, reducing heat transfer and
causing the discharge pressure (head pressure) to rise.
, 8. According to the EPA, what is the maximum leak rate allowed for industrial process
refrigeration containing more than 50 pounds of charge?
A. 10%
B. 20%
C. 30%
D. 35%
C. 30%
Explanation: Under Section 608 of the Clean Air Act, industrial process refrigeration
systems with 50+ lbs of charge have a 30% leak rate threshold.
9. What tool is used to measure the vacuum level of a system during evacuation?
A. Compound gauge
B. Micron gauge
C. Manometer
D. Sling psychrometer
B. Micron gauge
Explanation: A micron gauge provides the high-resolution measurement necessary to
ensure a deep vacuum (typically below 500 microns) has been achieved.
10. A 240V single-phase motor draws 10 amps. What is the power consumption in
Watts?
A. 24 Watts
B. 1,200 Watts
C. 2,400 Watts
D. 4,800 Watts
C. 2,400 Watts
Explanation: Power (P) is calculated by multiplying Voltage (V) by Amperage (I).
240 × 10 = 2,400 Watts.
11. Which type of compressor uses a piston and cylinder to compress refrigerant?
A. Scroll
B. Rotary
WELL DETAILED ANSWERS | PLUS RATIONALES | GUARANTEED PASS | LATEST EXAM
UPDATE
*Core Domains*
*• Thermodynamics and Heat Transfer*
*• Refrigerant Properties and Management*
*• System Components and Troubleshooting*
*• Electrical Theory and Control Circuits*
*• Utah State Laws and Administrative Rules*
*• Piping Standards and Braze Joints*
*• Safety, OSHA, and Environmental Compliance*
*• Load Calculations and Psychrometrics*
*Introduction*
*The purpose of this examination is to evaluate the technical proficiency and regulatory
knowledge required for licensure as a Refrigeration Contractor in the State of Utah. This
comprehensive assessment focuses on the skills necessary to design, install, maintain, and
repair various refrigeration systems while ensuring public safety and environmental
protection. The exam structure utilizes multiple-choice and scenario-based questions to
measure a candidate's mastery of foundational theory and real-world application. Emphasis
is placed on critical decision-making, precise load calculations, and strict adherence to the
Clean Air Act and Utah-specific administrative codes, ensuring all practitioners meet the
highest professional standards.*
SECTION ONE: QUESTIONS 1–100
1. What is the primary function of the evaporator in a vapor-compression refrigeration
cycle?
A. To reject heat to the surrounding air
B. To absorb heat from the refrigerated space
,C. To compress the refrigerant vapor
D. To regulate the flow of refrigerant
B. To absorb heat from the refrigerated space
Explanation: The evaporator serves as the heat exchanger where the low-pressure liquid
refrigerant evaporates, absorbing heat from the target area in the process.
2. In Utah, what is the maximum duration for which a temporary contractor's license
may be issued?
A. 30 days
B. 60 days
C. 90 days
D. 120 days
C. 90 days
Explanation: Under Utah administrative rules, temporary licenses are generally limited to
a 90-day period under specific emergency or transitional circumstances.
3. Which of the following refrigerants is classified as an HFO (Hydrofluoroolefin)?
A. R-22
B. R-134a
C. R-1234yf
D. R-410A
C. R-1234yf
Explanation: R-1234yf is a hydrofluoroolefin with low global warming potential, unlike
older HFCs or HCFCs.
4. A refrigeration system has a suction pressure of 76 psig and a suction line
temperature of 55°F. If the saturation temperature for the refrigerant at 76 psig is
45°F, what is the superheat?
A. 5°F
B. 10°F
C. 21°F
D. 131°F
, B. 10°F
Explanation: Superheat is calculated by subtracting the saturation temperature (45°F)
from the actual line temperature (55°F).
5. What is the required minimum height for a ladder to extend above a roof landing
according to OSHA standards?
A. 1 foot
B. 2 feet
C. 3 feet
D. 4 feet
C. 3 feet
Explanation: OSHA safety regulations require that ladder side rails extend at least 3 feet
above the upper landing surface to ensure safe transition.
6. Which component is responsible for preventing liquid refrigerant from entering the
compressor?
A. Oil separator
B. Filter drier
C. Receiver
D. Suction accumulator
D. Suction accumulator
Explanation: The suction accumulator is installed in the suction line to trap liquid
refrigerant and ensure only vapor enters the compressor, preventing slugging.
7. What is the effect of a dirty condenser coil on a refrigeration system?
A. Decreased head pressure
B. Increased suction pressure
C. Increased head pressure
D. Decreased power consumption
C. Increased head pressure
Explanation: Dirt acts as an insulator on the condenser coils, reducing heat transfer and
causing the discharge pressure (head pressure) to rise.
, 8. According to the EPA, what is the maximum leak rate allowed for industrial process
refrigeration containing more than 50 pounds of charge?
A. 10%
B. 20%
C. 30%
D. 35%
C. 30%
Explanation: Under Section 608 of the Clean Air Act, industrial process refrigeration
systems with 50+ lbs of charge have a 30% leak rate threshold.
9. What tool is used to measure the vacuum level of a system during evacuation?
A. Compound gauge
B. Micron gauge
C. Manometer
D. Sling psychrometer
B. Micron gauge
Explanation: A micron gauge provides the high-resolution measurement necessary to
ensure a deep vacuum (typically below 500 microns) has been achieved.
10. A 240V single-phase motor draws 10 amps. What is the power consumption in
Watts?
A. 24 Watts
B. 1,200 Watts
C. 2,400 Watts
D. 4,800 Watts
C. 2,400 Watts
Explanation: Power (P) is calculated by multiplying Voltage (V) by Amperage (I).
240 × 10 = 2,400 Watts.
11. Which type of compressor uses a piston and cylinder to compress refrigerant?
A. Scroll
B. Rotary
