ACG CXA CORE 2026 EXAMS PAPER QUESTIONS AND
ANSWERS SURE A+
✔✔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
information, if existing documentation does not exist
or is inaccurate
■ Review system operation and control sequences in detail
■ Prepare commissioning plan
✔✔What occurs during the Retro/Re-Commissioning "Implementation" phase? - ✔✔■
Balance systems, document and verify the results, if that is
part of the commissioning scope
■ Carry out functional performance tests on all HVAC systems
included in scope to confirm and verify that they meet expected requirements;
document results
■ Review O&M staff training; provide additional training or retraining as needed
■ Complete commissioning report
✔✔What type of Cx typically occurs for a building renovation? - ✔✔1. Key
commissioning activities shown in Table 4.1 for Comprehensive HVAC Commissioning
will generally apply. 2. The organizational structure for commissioning in a building
renovation project will typically be as shown in Figures 4.1 or 4.2, depending on whether
the work is being done on a plan
and spec or a design- build basis.
✔✔What is the typical scope of work and
Cx for building renovations? - ✔✔Typically limited to the systems (or portions of
systems)
being modifi ed or replaced.
2. Existing systems that interface with the new work will be included in the
commissioning scope to ensure correct systems and control integration has been
achieved
ANSWERS SURE A+
✔✔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
information, if existing documentation does not exist
or is inaccurate
■ Review system operation and control sequences in detail
■ Prepare commissioning plan
✔✔What occurs during the Retro/Re-Commissioning "Implementation" phase? - ✔✔■
Balance systems, document and verify the results, if that is
part of the commissioning scope
■ Carry out functional performance tests on all HVAC systems
included in scope to confirm and verify that they meet expected requirements;
document results
■ Review O&M staff training; provide additional training or retraining as needed
■ Complete commissioning report
✔✔What type of Cx typically occurs for a building renovation? - ✔✔1. Key
commissioning activities shown in Table 4.1 for Comprehensive HVAC Commissioning
will generally apply. 2. The organizational structure for commissioning in a building
renovation project will typically be as shown in Figures 4.1 or 4.2, depending on whether
the work is being done on a plan
and spec or a design- build basis.
✔✔What is the typical scope of work and
Cx for building renovations? - ✔✔Typically limited to the systems (or portions of
systems)
being modifi ed or replaced.
2. Existing systems that interface with the new work will be included in the
commissioning scope to ensure correct systems and control integration has been
achieved
