CBCP Energy Management & Sustainability Flashcards
6 cards from real CBCP practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 CBCP Energy Management & Sustainability flashcards as text
What is 'demand-controlled ventilation (DCV)' and why is it significant in energy commissioning?
Answer: Adjusting outdoor air supply based on actual CO2 levels to reduce over-ventilation energy waste
DCV uses CO2 sensors as a proxy for occupancy to modulate outdoor air intake, preventing energy waste from over-ventilating lightly occupied spaces.
An energy model predicts a building will use 45 kBtu/sq ft/yr, but post-occupancy metering shows 72 kBtu/sq ft/yr. What is the first step in a commissioning investigation?
Answer: Review BAS trend data and compare actual operating schedules and setpoints against design assumptions
Reviewing BAS trend data against design assumptions identifies whether operational deviations (schedules, setpoints, equipment runtime) explain the gap.
What is 'measurement and verification (M&V)' in the context of energy commissioning?
Answer: A systematic process of measuring and analyzing energy data to confirm that energy conservation measures achieve their predicted savings
M&V quantifies actual energy savings from conservation measures by comparing measured baseline and post-implementation energy consumption.
Which ASHRAE standard provides guidance on measurement and verification of energy and water savings in buildings?
Answer: ASHRAE Guideline 14
ASHRAE Guideline 14 provides protocols for measuring and verifying energy and water savings from efficiency projects.
What is the purpose of a 'building energy audit' conducted during retro-commissioning?
Answer: Systematically identifying energy waste, inefficiencies, and opportunities for improvement in existing building systems
An energy audit evaluates existing building systems to identify operational deficiencies and capital improvements that reduce energy consumption.
In a chilled water system, what commissioning check helps verify that the chiller is operating at or near its design efficiency (kW/ton)?
Answer: Verifying entering and leaving chilled water temperatures, flow rate, and compressor power draw to calculate actual efficiency
Calculating actual kW/ton requires measuring water temperatures, flow, and electrical power, confirming the chiller matches its rated efficiency.