FLORIDA CLASS B AIR-CONDITIONING CONTRACTOR EXAM PRACTICE —
COMPREHENSIVE STUDY GUIDE & FULL TESTBANK — 150 ADVANCED
PRACTICE QUESTIONS & 100% CORRECT ANSWERS WITH RATIONALES —
2026/2027 LATEST UPDATE
TABLE OF CONTENTS
i. Florida Class B Contractor Scope, Licensing & Regulatory Requirements
ii. Florida Building Code — Mechanical Requirements
iii. HVAC Load Calculations, Sizing & System Selection
iv. Refrigeration Cycle, Components & Refrigerant Management
v. Air Distribution, Ductwork, Ventilation & Indoor Air Quality
vi. Electrical Controls, Motors, Disconnects & Protection
vii. Heating Systems, Combustion & Safety Controls
viii. Installation, Piping, Condensate & Drainage
ix. Advanced Diagnostics, Troubleshooting & Commissioning
x. Energy Efficiency, Controls & Building Performance
xi. Refrigeration, Heat Pumps & Defrost Systems
xii. Safety, Environmental Compliance & Professional Practice
xiii. Documentation, Inspection, Permitting & Code Compliance
xiv. Advanced Scenario-Based Applications
xv. Integrated Professional-Level Review
DESCRIPTION
This comprehensive Florida Class B Air-Conditioning Contractor practice
examination is designed for candidates preparing for advanced professional
licensing and certification assessment. It covers contractor scope, Florida
construction requirements, mechanical systems, refrigeration, HVAC design, load
calculations, ductwork, electrical controls, heating, ventilation, condensate
systems, troubleshooting, energy efficiency, safety, documentation, inspections,
and professional decision-making. The questions emphasize application, analysis,
code interpretation, calculations, troubleshooting, and realistic jobsite scenarios
rather than simple memorization. It contains 100+ questions and answers with a
rationale to reinforce conceptual understanding and exam readiness. Purchase and
instantly get a downloadable and editable PDF for convenient study, review, and
preparation.
Question 1
A. A Class B air-conditioning contractor may contract for unlimited-tonnage
central air-conditioning systems if the contractor personally performs the
installation.
,B. A Class B air-conditioning contractor is limited to systems not exceeding 25
tons of cooling and 500,000 Btu of heating in any one system.
C. A Class B contractor may install unlimited heating equipment but is limited to
25 tons of cooling.
D. A Class B contractor may exceed the limitation when the project is residential.
🔴 Correct Answer: B. A Class B air-conditioning contractor is limited to systems
not exceeding 25 tons of cooling and 500,000 Btu of heating in any one system.
🔵 Explanation: The statutory Class B scope limits the contractor to 25 tons of
cooling and 500,000 Btu of heating in any one system. The limitation applies
regardless of whether the project is residential or commercial.
Question 2
A Class B contractor is asked to install a 30-ton packaged rooftop unit. What is the
principal licensing-scope issue?
A. The work is permissible if two technicians perform the installation.
B. The work is permissible if the unit is factory-certified.
C. The system exceeds the Class B cooling limitation.
D. The work is permissible if the owner signs a waiver.
🔴 Correct Answer: C. The system exceeds the Class B cooling limitation.
🔵 Explanation: A 30-ton system exceeds the 25-ton cooling limitation applicable to
a Class B air-conditioning contractor. Employee count, manufacturer certification, or
an owner waiver does not expand the statutory license scope.
Question 3
A contractor proposes a 600,000-Btu/h heating system under a Class B license.
Which conclusion is most appropriate?
A. It is automatically permitted because the cooling load is below 25 tons.
B. It is permitted if the system is electric.
C. It exceeds the Class B heating limitation.
D. It is permitted if the contractor obtains a mechanical permit.
🔴 Correct Answer: C. It exceeds the Class B heating limitation.
🔵 Explanation: Class B scope is limited to 500,000 Btu of heating in any one
system. A mechanical permit does not enlarge the contractor's licensing
classification.
Question 4
A Class B contractor installs ductwork only as necessary to complete an air-
distribution system being installed under the Class B classification. Which
statement is most accurate?
A. Such ductwork can fall within the contractor's Class B scope.
,B. All ductwork is categorically prohibited.
C. Ductwork may be installed only by a sheet-metal contractor.
D. Ductwork is allowed only when the system exceeds 25 tons.
🔴 Correct Answer: A. Such ductwork can fall within the contractor's Class B
scope.
🔵 Explanation: The statutory Class B scope includes ductwork connected with a
complete system to the extent it is necessary to complete the air-distribution system
being installed under that classification.
Question 5
A Class B contractor is asked to install potable-water piping for an air-conditioning
project. What is the appropriate response?
A. Perform the work because the piping serves HVAC equipment.
B. Perform the work only if the pipe is copper.
C. Perform the work only after receiving an owner waiver.
D. Do not perform the potable-water work under the Class B air-conditioning
scope.
🔴 Correct Answer: D. Do not perform the potable-water work under the Class
B air-conditioning scope.
🔵 Explanation: Potable-water lines and connections are expressly outside the Class
B air-conditioning contractor's statutory scope.
Question 6
Which work is specifically excluded from the Class B air-conditioning contractor's
scope?
A. Condensate drainage to an approved disposal point
B. Low-voltage HVAC control wiring
C. Swimming-pool piping and filters
D. Insulation of HVAC piping
🔴 Correct Answer: C. Swimming-pool piping and filters
🔵 Explanation: Swimming-pool piping and filters are expressly excluded. HVAC
piping insulation, qualifying condensate drainage, and low-voltage HVAC controls
fall within the specified Class B scope.
Question 7
A Class B contractor must install a condensate drain from a new air-conditioning
unit. Which destination is consistent with the licensing scope?
A. A direct connection to the sanitary sewer without an approved method
B. An existing safe waste or other approved disposal point
, C. A swimming-pool return line
D. A potable-water supply line
🔴 Correct Answer: B. An existing safe waste or other approved disposal point
🔵 Explanation: The statutory scope allows a Class B contractor to install a
condensate drain to an existing safe waste or other approved disposal, while
excluding direct connection to a sanitary system.
Question 8
A Class B contractor is evaluating an existing central HVAC system without
performing regulated installation work. Which statement is most accurate?
A. Testing and evaluation are prohibited to Class B contractors.
B. Testing and evaluation may be performed, and a mandatory licensing
requirement is not established for those specific services.
C. Testing is allowed only for systems below 5 tons.
D. Evaluation requires a plumbing license.
🔴 Correct Answer: B. Testing and evaluation may be performed, and a
mandatory licensing requirement is not established for those specific services.
🔵 Explanation: The statutory scope expressly recognizes testing and evaluation of
central air-conditioning, refrigeration, heating, and ventilating systems, while stating
that mandatory licensing is not established for those specific services.
Question 9
A Class B contractor encounters a project requiring an LP-gas fuel line within a
building. What is the correct licensing analysis?
A. The work is automatically included because the line serves an HVAC appliance.
B. The work is excluded from the Class B scope except for specified appliance
changeout disconnection/reconnection circumstances.
C. The work is included whenever the contractor holds an HVAC certification.
D. The work is included if the pipe is less than one inch.
🔴 Correct Answer: B. The work is excluded from the Class B scope except for
specified appliance changeout disconnection/reconnection circumstances.
🔵 Explanation: LP-gas and natural-gas fuel lines within buildings are excluded
from the Class B scope, subject to the statutory exception concerning disconnecting
or reconnecting qualifying appliance changeouts.
Question 10
Which action most clearly demonstrates proper licensing-scope management?
A. Accepting any HVAC project and subcontracting the excess work informally
B. Comparing every proposed system's capacity and work scope against the
license before contract execution
COMPREHENSIVE STUDY GUIDE & FULL TESTBANK — 150 ADVANCED
PRACTICE QUESTIONS & 100% CORRECT ANSWERS WITH RATIONALES —
2026/2027 LATEST UPDATE
TABLE OF CONTENTS
i. Florida Class B Contractor Scope, Licensing & Regulatory Requirements
ii. Florida Building Code — Mechanical Requirements
iii. HVAC Load Calculations, Sizing & System Selection
iv. Refrigeration Cycle, Components & Refrigerant Management
v. Air Distribution, Ductwork, Ventilation & Indoor Air Quality
vi. Electrical Controls, Motors, Disconnects & Protection
vii. Heating Systems, Combustion & Safety Controls
viii. Installation, Piping, Condensate & Drainage
ix. Advanced Diagnostics, Troubleshooting & Commissioning
x. Energy Efficiency, Controls & Building Performance
xi. Refrigeration, Heat Pumps & Defrost Systems
xii. Safety, Environmental Compliance & Professional Practice
xiii. Documentation, Inspection, Permitting & Code Compliance
xiv. Advanced Scenario-Based Applications
xv. Integrated Professional-Level Review
DESCRIPTION
This comprehensive Florida Class B Air-Conditioning Contractor practice
examination is designed for candidates preparing for advanced professional
licensing and certification assessment. It covers contractor scope, Florida
construction requirements, mechanical systems, refrigeration, HVAC design, load
calculations, ductwork, electrical controls, heating, ventilation, condensate
systems, troubleshooting, energy efficiency, safety, documentation, inspections,
and professional decision-making. The questions emphasize application, analysis,
code interpretation, calculations, troubleshooting, and realistic jobsite scenarios
rather than simple memorization. It contains 100+ questions and answers with a
rationale to reinforce conceptual understanding and exam readiness. Purchase and
instantly get a downloadable and editable PDF for convenient study, review, and
preparation.
Question 1
A. A Class B air-conditioning contractor may contract for unlimited-tonnage
central air-conditioning systems if the contractor personally performs the
installation.
,B. A Class B air-conditioning contractor is limited to systems not exceeding 25
tons of cooling and 500,000 Btu of heating in any one system.
C. A Class B contractor may install unlimited heating equipment but is limited to
25 tons of cooling.
D. A Class B contractor may exceed the limitation when the project is residential.
🔴 Correct Answer: B. A Class B air-conditioning contractor is limited to systems
not exceeding 25 tons of cooling and 500,000 Btu of heating in any one system.
🔵 Explanation: The statutory Class B scope limits the contractor to 25 tons of
cooling and 500,000 Btu of heating in any one system. The limitation applies
regardless of whether the project is residential or commercial.
Question 2
A Class B contractor is asked to install a 30-ton packaged rooftop unit. What is the
principal licensing-scope issue?
A. The work is permissible if two technicians perform the installation.
B. The work is permissible if the unit is factory-certified.
C. The system exceeds the Class B cooling limitation.
D. The work is permissible if the owner signs a waiver.
🔴 Correct Answer: C. The system exceeds the Class B cooling limitation.
🔵 Explanation: A 30-ton system exceeds the 25-ton cooling limitation applicable to
a Class B air-conditioning contractor. Employee count, manufacturer certification, or
an owner waiver does not expand the statutory license scope.
Question 3
A contractor proposes a 600,000-Btu/h heating system under a Class B license.
Which conclusion is most appropriate?
A. It is automatically permitted because the cooling load is below 25 tons.
B. It is permitted if the system is electric.
C. It exceeds the Class B heating limitation.
D. It is permitted if the contractor obtains a mechanical permit.
🔴 Correct Answer: C. It exceeds the Class B heating limitation.
🔵 Explanation: Class B scope is limited to 500,000 Btu of heating in any one
system. A mechanical permit does not enlarge the contractor's licensing
classification.
Question 4
A Class B contractor installs ductwork only as necessary to complete an air-
distribution system being installed under the Class B classification. Which
statement is most accurate?
A. Such ductwork can fall within the contractor's Class B scope.
,B. All ductwork is categorically prohibited.
C. Ductwork may be installed only by a sheet-metal contractor.
D. Ductwork is allowed only when the system exceeds 25 tons.
🔴 Correct Answer: A. Such ductwork can fall within the contractor's Class B
scope.
🔵 Explanation: The statutory Class B scope includes ductwork connected with a
complete system to the extent it is necessary to complete the air-distribution system
being installed under that classification.
Question 5
A Class B contractor is asked to install potable-water piping for an air-conditioning
project. What is the appropriate response?
A. Perform the work because the piping serves HVAC equipment.
B. Perform the work only if the pipe is copper.
C. Perform the work only after receiving an owner waiver.
D. Do not perform the potable-water work under the Class B air-conditioning
scope.
🔴 Correct Answer: D. Do not perform the potable-water work under the Class
B air-conditioning scope.
🔵 Explanation: Potable-water lines and connections are expressly outside the Class
B air-conditioning contractor's statutory scope.
Question 6
Which work is specifically excluded from the Class B air-conditioning contractor's
scope?
A. Condensate drainage to an approved disposal point
B. Low-voltage HVAC control wiring
C. Swimming-pool piping and filters
D. Insulation of HVAC piping
🔴 Correct Answer: C. Swimming-pool piping and filters
🔵 Explanation: Swimming-pool piping and filters are expressly excluded. HVAC
piping insulation, qualifying condensate drainage, and low-voltage HVAC controls
fall within the specified Class B scope.
Question 7
A Class B contractor must install a condensate drain from a new air-conditioning
unit. Which destination is consistent with the licensing scope?
A. A direct connection to the sanitary sewer without an approved method
B. An existing safe waste or other approved disposal point
, C. A swimming-pool return line
D. A potable-water supply line
🔴 Correct Answer: B. An existing safe waste or other approved disposal point
🔵 Explanation: The statutory scope allows a Class B contractor to install a
condensate drain to an existing safe waste or other approved disposal, while
excluding direct connection to a sanitary system.
Question 8
A Class B contractor is evaluating an existing central HVAC system without
performing regulated installation work. Which statement is most accurate?
A. Testing and evaluation are prohibited to Class B contractors.
B. Testing and evaluation may be performed, and a mandatory licensing
requirement is not established for those specific services.
C. Testing is allowed only for systems below 5 tons.
D. Evaluation requires a plumbing license.
🔴 Correct Answer: B. Testing and evaluation may be performed, and a
mandatory licensing requirement is not established for those specific services.
🔵 Explanation: The statutory scope expressly recognizes testing and evaluation of
central air-conditioning, refrigeration, heating, and ventilating systems, while stating
that mandatory licensing is not established for those specific services.
Question 9
A Class B contractor encounters a project requiring an LP-gas fuel line within a
building. What is the correct licensing analysis?
A. The work is automatically included because the line serves an HVAC appliance.
B. The work is excluded from the Class B scope except for specified appliance
changeout disconnection/reconnection circumstances.
C. The work is included whenever the contractor holds an HVAC certification.
D. The work is included if the pipe is less than one inch.
🔴 Correct Answer: B. The work is excluded from the Class B scope except for
specified appliance changeout disconnection/reconnection circumstances.
🔵 Explanation: LP-gas and natural-gas fuel lines within buildings are excluded
from the Class B scope, subject to the statutory exception concerning disconnecting
or reconnecting qualifying appliance changeouts.
Question 10
Which action most clearly demonstrates proper licensing-scope management?
A. Accepting any HVAC project and subcontracting the excess work informally
B. Comparing every proposed system's capacity and work scope against the
license before contract execution
