CBCP Commissioning Process & Documentation 3

Question 1

Retro-commissioning (RCx) is best defined as:

Accepted Answer

A systematic process applied to existing buildings that were never previously commissioned to optimize system performance

Answer

Retro-commissioning targets existing buildings that were not commissioned when originally built, using investigative methods to identify and correct operational deficiencies and improve energy performance.

Question 2

What distinguishes re-commissioning from retro-commissioning?

Accepted Answer

Re-commissioning applies commissioning to buildings that were previously commissioned, while retro-commissioning addresses buildings never previously commissioned

Answer

Re-commissioning re-applies the commissioning process to a building that was previously commissioned to restore or improve performance, whereas retro-commissioning is the first commissioning of an existing building.

Question 3

Under the LEED Enhanced Commissioning credit, which additional activity is required beyond fundamental commissioning?

Accepted Answer

Review of the OPR and BOD by the CxA during the design phase and a post-occupancy review 10 months after substantial completion

Answer

LEED Enhanced Commissioning requires the CxA to review the OPR and BOD during design and conduct a post-occupancy commissioning review approximately 10 months after substantial completion to confirm continued performance.

Question 4

What is the primary purpose of trend logging building automation system (BAS) data during the commissioning process?

Accepted Answer

To verify that systems are operating per their sequences of operations and design setpoints over time across varied conditions

Answer

Trend logging captures time-series BAS data that reveals actual system behavior across changing loads and conditions, allowing the CxA to verify correct sequencing, setpoints, and control responses.

Question 5

Which of the following best describes 'ongoing commissioning' as defined in ASHRAE Guideline 0?

Accepted Answer

A continuous monitoring and verification process during building occupancy to sustain optimized system performance over the building's life

Answer

Ongoing commissioning uses continuous monitoring, fault detection, and periodic re-verification to ensure building systems maintain optimal performance throughout the building's operational life.

CBCP - Certified Building Commissioning Professional Practice Test

CBCP - Certified Building Commissioning Professional Practice Test

CBCP Commissioning Process & Documentation 3