ACG CXA 2026 UPDATED EXAMS STUDY GUIDE
QUESTIONS AND ANSWERS SURE A+
✔✔During commissioning what statements identify the CxA's role? - ✔✔1. Authority
leads the commissioning process, and works
cooperatively with the designers and contractors, but always in the owner's interest
2. Facilitates communication and coordination among designers, contractors and
suppliers.
✔✔Identify the Comprehensive HVAC commissioning organizational structure for
Design Build - ✔✔
✔✔If the project uses the traditional plan and spec process, the commissioning
authority will typically report directly to who? - ✔✔The Owner
✔✔Define Construction HVAC Commissioning—New Construction. - ✔✔Takes place
during the construction,
acceptance and post-acceptance phases of the project.
✔✔Which Chapter of the ACG guideline identifies detailed methodology for Contruction
HVAC Commissioning? - ✔✔Chapter 6
✔✔What are the negative consequences of Construction HVAC Cx? - ✔✔1. Eliminates
the pre-design and design phase planning and preparation included in Comprehensive
HVAC Commissioning.
2. Negative impact on commissioning effectiveness, and produces very little cost
savings.
3. Contractor has little or no advance warning that Cx will occur.
4. Commissioning authority has minimal time to plan and coordinate the commissioning
process before system start-ups are scheduled.
✔✔What are the Construction HVAC Commissioning phases? - ✔✔Construction
Acceptance
Post-Acceptance
✔✔Construction HVAC Commissioning Construction phase - ✔✔■ Identify
commissioning scope; develop commissioning
test details
■ Commissioning authority reviews contractor submittals
■ Coordinate commissioning process—through commissioning plan, commissioning
meeting and schedule
■ Carry out and document system verifi cation checks
■ Observe and document equipment and system start-ups
■ TAB agency completes and documents test and balance
, work
✔✔Construction HVAC Commissioning Acceptance phase - ✔✔■ Carry out and
document functional performance tests
■ Verify reported TAB results
■ Train O&M staff
■ Submit final commissioning report
✔✔Construction HVAC Commissioning Post-Acceptance phase - ✔✔■ Carry out and
document any required "off season" functional performance tests
■ Revise and submit final commissioning report, if required
✔✔Identify the Construction HVAC commissioning organizational structure for Plan &
Spec. - ✔✔
✔✔HVAC commissioning in existing buildings can take place for a number of reasons
such as: - ✔✔1. Periodic re-commissioning
2. Retro-commissioning
3. HVAC system modifications
✔✔What is periodic re-commissioning and what is the purpose? - ✔✔1. Periodically, the
HVAC systems in a building
that were commissioned when new are re-commissioned. 2. 2. The purpose of re-
commissioning could be to diagnose the cause of ongoing, unresolved problems, or as
part of a planned preventive maintenance program that includes formal re-
commissioning elements
✔✔What is retro-commissioning and what is the purpose? - ✔✔Identical to that for re-
commissioning, except that it occurs when the HVAC systems in a building were not
commissioned when new, and are being commissioned for the first time
✔✔Which Chapter of the ACG guideline identifies detailed methodology for Retro/Re-
Commissioning? - ✔✔Chapter 7
✔✔Identify the re-Cx or retro-Cx organizational structure in existing buildings. - ✔✔
✔✔What are the Retro/Re-Commissioning phases? - ✔✔1. Planning
2. Implementation
✔✔What occurs during the Retro/Re-Commissioning "Planning" phase? - ✔✔■ The
owner selects the commissioning authority
■ The scope of commissioning is identified
■ Review existing documentation, if available
■ Carry out a survey to gather and document needed
QUESTIONS AND ANSWERS SURE A+
✔✔During commissioning what statements identify the CxA's role? - ✔✔1. Authority
leads the commissioning process, and works
cooperatively with the designers and contractors, but always in the owner's interest
2. Facilitates communication and coordination among designers, contractors and
suppliers.
✔✔Identify the Comprehensive HVAC commissioning organizational structure for
Design Build - ✔✔
✔✔If the project uses the traditional plan and spec process, the commissioning
authority will typically report directly to who? - ✔✔The Owner
✔✔Define Construction HVAC Commissioning—New Construction. - ✔✔Takes place
during the construction,
acceptance and post-acceptance phases of the project.
✔✔Which Chapter of the ACG guideline identifies detailed methodology for Contruction
HVAC Commissioning? - ✔✔Chapter 6
✔✔What are the negative consequences of Construction HVAC Cx? - ✔✔1. Eliminates
the pre-design and design phase planning and preparation included in Comprehensive
HVAC Commissioning.
2. Negative impact on commissioning effectiveness, and produces very little cost
savings.
3. Contractor has little or no advance warning that Cx will occur.
4. Commissioning authority has minimal time to plan and coordinate the commissioning
process before system start-ups are scheduled.
✔✔What are the Construction HVAC Commissioning phases? - ✔✔Construction
Acceptance
Post-Acceptance
✔✔Construction HVAC Commissioning Construction phase - ✔✔■ Identify
commissioning scope; develop commissioning
test details
■ Commissioning authority reviews contractor submittals
■ Coordinate commissioning process—through commissioning plan, commissioning
meeting and schedule
■ Carry out and document system verifi cation checks
■ Observe and document equipment and system start-ups
■ TAB agency completes and documents test and balance
, work
✔✔Construction HVAC Commissioning Acceptance phase - ✔✔■ Carry out and
document functional performance tests
■ Verify reported TAB results
■ Train O&M staff
■ Submit final commissioning report
✔✔Construction HVAC Commissioning Post-Acceptance phase - ✔✔■ Carry out and
document any required "off season" functional performance tests
■ Revise and submit final commissioning report, if required
✔✔Identify the Construction HVAC commissioning organizational structure for Plan &
Spec. - ✔✔
✔✔HVAC commissioning in existing buildings can take place for a number of reasons
such as: - ✔✔1. Periodic re-commissioning
2. Retro-commissioning
3. HVAC system modifications
✔✔What is periodic re-commissioning and what is the purpose? - ✔✔1. Periodically, the
HVAC systems in a building
that were commissioned when new are re-commissioned. 2. 2. The purpose of re-
commissioning could be to diagnose the cause of ongoing, unresolved problems, or as
part of a planned preventive maintenance program that includes formal re-
commissioning elements
✔✔What is retro-commissioning and what is the purpose? - ✔✔Identical to that for re-
commissioning, except that it occurs when the HVAC systems in a building were not
commissioned when new, and are being commissioned for the first time
✔✔Which Chapter of the ACG guideline identifies detailed methodology for Retro/Re-
Commissioning? - ✔✔Chapter 7
✔✔Identify the re-Cx or retro-Cx organizational structure in existing buildings. - ✔✔
✔✔What are the Retro/Re-Commissioning phases? - ✔✔1. Planning
2. Implementation
✔✔What occurs during the Retro/Re-Commissioning "Planning" phase? - ✔✔■ The
owner selects the commissioning authority
■ The scope of commissioning is identified
■ Review existing documentation, if available
■ Carry out a survey to gather and document needed
