FLORIDA AIR CONDITIONING CLASS B
CONTRACTOR EXAM NEWEST 2026 EXAM
COMPLETE 100 QUESTIONS AND CORRECT
DETAILED ANSWERS (VERIFIED ANSWERS)
|ALREADY GRADED A+
1. Which of the following is the minimum temperature at which refrigerants
in an air conditioning system should operate?
o A. 40°F
o B. 32°F
o C. 20°F
o D. 45°F
The recommended minimum operating temperature for air
conditioning systems is typically 45°F to avoid freezing of the coils and
other system components.
2. What is the purpose of a compressor in an air conditioning system?
o A. To circulate the refrigerant through the system
o B. To increase the pressure of the refrigerant
o C. To expand the refrigerant
o D. To cool the air
The compressor's function is to compress the refrigerant gas, raising
its pressure and temperature before it moves to the condenser.
3. Which of the following refrigerants is commonly used in residential air
conditioning systems?
, o A. R-11
o B. R-410A
o C. R-22
o D. R-12
R-410A is the standard refrigerant used in modern residential systems
due to its environmental benefits compared to older refrigerants like
R-22.
4. What is the primary cause of "short cycling" in an air conditioning system?
o A. Overcharged refrigerant
o B. Dirty evaporator coil
o C. Faulty thermostat or pressure switch
o D. Low airflow across the evaporator
Short cycling is often caused by issues with the thermostat or pressure
switches that lead to frequent and unnecessary cycling of the
compressor.
5. What should be checked first when an air conditioning unit is not cooling
properly?
o A. Refrigerant level
o B. Airflow across the evaporator coil
o C. Electrical connections
o D. Compressor pressure
Low airflow across the evaporator coil is often the first thing to check,
as it can prevent proper cooling and lead to other system issues.
6. Which of the following is true about R-22 refrigerant?
o A. It is being phased out due to its ozone-depleting properties.
o B. It is being replaced by R-410A in most systems.
, o C. It is a non-flammable refrigerant.
o D. It is still the most commonly used refrigerant in residential
systems.
R-22 is being phased out globally, and systems now typically use R-
410A, which is more environmentally friendly.
7. What is the purpose of the evaporator coil in an air conditioning system?
o A. To heat the air
o B. To absorb heat from the air and cool it
o C. To compress the refrigerant
o D. To control the refrigerant flow
The evaporator coil absorbs heat from the indoor air and helps cool it
by transferring that heat to the refrigerant.
8. Which of the following is the correct sequence of operations for the
refrigeration cycle?
o A. Compressor → Condenser → Expansion valve → Evaporator
o B. Compressor → Expansion valve → Evaporator → Condenser
o C. Condenser → Compressor → Expansion valve → Evaporator
o D. Evaporator → Condenser → Expansion valve → Compressor
The correct cycle is: Compressor → Expansion valve → Evaporator →
Condenser.
9. In an air conditioning system, what is the typical voltage used for a
residential unit?
o A. 120 volts
o B. 240 volts
o C. 480 volts
, o D. 60 volts
Most residential air conditioning systems operate on 240 volts.
10.What is the effect of using a dirty or clogged air filter in an air conditioning
system?
o A. Increased energy efficiency
o B. Longer system lifespan
o C. Reduced airflow and potential system damage
o D. Increased cooling capacity
A dirty filter reduces airflow, which can cause the system to overheat
and reduce its efficiency, potentially leading to breakdowns.
11.What is the most common reason for a refrigerant leak in an air
conditioning system?
o A. Poor installation or aging components
o B. Low refrigerant levels
o C. Too much oil in the system
o D. Excessive power supply
Refrigerant leaks are commonly caused by poor installation practices
or the degradation of components due to age.
12.What is the purpose of the condenser coil in an air conditioning system?
o A. To absorb heat from the room air
o B. To release heat absorbed from the indoor air
o C. To regulate refrigerant flow
o D. To control humidity levels
The condenser coil releases heat absorbed by the refrigerant during
the cooling process.
CONTRACTOR EXAM NEWEST 2026 EXAM
COMPLETE 100 QUESTIONS AND CORRECT
DETAILED ANSWERS (VERIFIED ANSWERS)
|ALREADY GRADED A+
1. Which of the following is the minimum temperature at which refrigerants
in an air conditioning system should operate?
o A. 40°F
o B. 32°F
o C. 20°F
o D. 45°F
The recommended minimum operating temperature for air
conditioning systems is typically 45°F to avoid freezing of the coils and
other system components.
2. What is the purpose of a compressor in an air conditioning system?
o A. To circulate the refrigerant through the system
o B. To increase the pressure of the refrigerant
o C. To expand the refrigerant
o D. To cool the air
The compressor's function is to compress the refrigerant gas, raising
its pressure and temperature before it moves to the condenser.
3. Which of the following refrigerants is commonly used in residential air
conditioning systems?
, o A. R-11
o B. R-410A
o C. R-22
o D. R-12
R-410A is the standard refrigerant used in modern residential systems
due to its environmental benefits compared to older refrigerants like
R-22.
4. What is the primary cause of "short cycling" in an air conditioning system?
o A. Overcharged refrigerant
o B. Dirty evaporator coil
o C. Faulty thermostat or pressure switch
o D. Low airflow across the evaporator
Short cycling is often caused by issues with the thermostat or pressure
switches that lead to frequent and unnecessary cycling of the
compressor.
5. What should be checked first when an air conditioning unit is not cooling
properly?
o A. Refrigerant level
o B. Airflow across the evaporator coil
o C. Electrical connections
o D. Compressor pressure
Low airflow across the evaporator coil is often the first thing to check,
as it can prevent proper cooling and lead to other system issues.
6. Which of the following is true about R-22 refrigerant?
o A. It is being phased out due to its ozone-depleting properties.
o B. It is being replaced by R-410A in most systems.
, o C. It is a non-flammable refrigerant.
o D. It is still the most commonly used refrigerant in residential
systems.
R-22 is being phased out globally, and systems now typically use R-
410A, which is more environmentally friendly.
7. What is the purpose of the evaporator coil in an air conditioning system?
o A. To heat the air
o B. To absorb heat from the air and cool it
o C. To compress the refrigerant
o D. To control the refrigerant flow
The evaporator coil absorbs heat from the indoor air and helps cool it
by transferring that heat to the refrigerant.
8. Which of the following is the correct sequence of operations for the
refrigeration cycle?
o A. Compressor → Condenser → Expansion valve → Evaporator
o B. Compressor → Expansion valve → Evaporator → Condenser
o C. Condenser → Compressor → Expansion valve → Evaporator
o D. Evaporator → Condenser → Expansion valve → Compressor
The correct cycle is: Compressor → Expansion valve → Evaporator →
Condenser.
9. In an air conditioning system, what is the typical voltage used for a
residential unit?
o A. 120 volts
o B. 240 volts
o C. 480 volts
, o D. 60 volts
Most residential air conditioning systems operate on 240 volts.
10.What is the effect of using a dirty or clogged air filter in an air conditioning
system?
o A. Increased energy efficiency
o B. Longer system lifespan
o C. Reduced airflow and potential system damage
o D. Increased cooling capacity
A dirty filter reduces airflow, which can cause the system to overheat
and reduce its efficiency, potentially leading to breakdowns.
11.What is the most common reason for a refrigerant leak in an air
conditioning system?
o A. Poor installation or aging components
o B. Low refrigerant levels
o C. Too much oil in the system
o D. Excessive power supply
Refrigerant leaks are commonly caused by poor installation practices
or the degradation of components due to age.
12.What is the purpose of the condenser coil in an air conditioning system?
o A. To absorb heat from the room air
o B. To release heat absorbed from the indoor air
o C. To regulate refrigerant flow
o D. To control humidity levels
The condenser coil releases heat absorbed by the refrigerant during
the cooling process.
