Quiz: AI Data Center Sustainability, PUE & Carbon (Part 15)

10 questions from Part 15 of the guide. Score instantly; every explanation links to the chapter that derives the answer.

PUE's blind spot in a liquid-cooled AI facility is that it…
is too strictonly works in cold climatesrewards moving losses inside the IT boundary and ignores water, carbon, and useful workcan't be computed anymore
Uptime Institute's cited survey-reported respondent average PUE has been stuck around…
1.11.54, flat for six consecutive years2.50.9
Which facility-water design choice materially affects economizer hours and heat-reuse potential?
lighting schedulesoffice thermostatthe supported W17–W45+ facility-water supply capability and operating point, evaluated with climate bins, approaches, rejection method and load profileUPS float voltage
Location-based vs market-based Scope 2 reporting differ in that…
location-based uses the physical grid mix; market-based lets contracted clean power (PPAs, RECs) offset — and 24/7 CFE matching is the stricter frontiermarket-based is banned in the EUlocation-based includes Scope 3they always match
The site water decision is fundamentally…
about landscapingevaporate (low-PUE, water-exposed) vs closed-loop/dry (near-zero process water, energy-exposed) — and grid power embeds ~5.1 L/kWh anywaycosmeticsolved by desalination
Heat reuse becomes economically real when…
electricity is freenever; it's greenwashingany data center exists near a citythe supported operating return, transferable heat, demand profile, approach losses or heat-pump duty, distance, and offtake contract close the project heat balance — with Germany's EnEfG 10→20% minima where applicable
A campus model says embodied carbon will overtake operational carbon during the asset life. Which input can flip that conclusion?
the PUE target alonethe grid-decarbonization path, construction mix, hardware-refresh cadence, utilization, and the lifecycle boundary used for both sidesthe color of the building envelopethe annual renewable-energy certificate budget
EU EED Article 12 requires data centers above 500 kW IT to…
submit PUE, WUE, ERF, and REF annually to the EU databaseuse only renewablesrun undergroundclose by 2030
A flexible interconnection can avoid part of a network-upgrade wait. Which input most directly flips it from an advantage to a bad fit?
the number of queue headlines in the market reportwhether the utility calls the product greenthe campus paint colorwhether the workload, bridge plant, permits, contracts, and financing can absorb the actual curtailment duration, frequency, notice, and recovery cost
Cooling-energy savings from water-side economizing versus mechanical-only run…
~40–65% annually~15%~5%~99%

Check your understanding: Sustainability & Efficiency