CDCP Energy Efficiency and Sustainability 3

Question 1

Which IT strategy most directly reduces data center energy waste caused by underutilized physical servers?

Accepted Answer

Server virtualization and workload consolidation

Answer

Installing higher-wattage power supplies

Answer

Increasing the server hardware refresh cycle frequency

Answer

Deploying additional redundant physical servers

Question 2

What does a data center PUE value greater than 2.0 typically indicate?

Accepted Answer

Poor efficiency where overhead systems consume more power than IT equipment

Answer

Excellent energy efficiency and industry-leading performance

Answer

A Tier IV fault-tolerant fully redundant facility

Answer

A data center operating in full economizer mode

Question 3

Which power supply characteristic most directly impacts server-level energy efficiency and is standardized through certification?

Accepted Answer

PSU efficiency rating under the 80 PLUS certification program

Answer

Input voltage rating (120V vs. 208V)

Answer

Maximum wattage capacity of the power supply unit

Answer

Number of output voltage rails provided

Question 4

What does the term 'stranded capacity' mean in the context of data center efficiency?

Accepted Answer

Power or cooling infrastructure that exists but cannot be utilized due to physical constraints

Answer

Emergency backup power capacity held in reserve for failover events

Answer

Servers that have been decommissioned and physically removed from racks

Answer

Network bandwidth reserved exclusively for disaster recovery traffic

Question 5

Which efficiency improvement involves raising CRAC/CRAH supply air setpoints to reduce compressor energy consumption?

Accepted Answer

Operating at higher allowable server inlet temperatures

Answer

Deploying in-row liquid cooling units

Answer

Implementing blanking panels in open rack slots

Answer

Activating economizer mode on chiller plants

Question 6

What is the primary purpose of conducting a Data Center Energy Efficiency (DCEE) audit?

Accepted Answer

To assess current energy use and identify specific opportunities to improve PUE

Answer

To identify physical security vulnerabilities within the facility

Answer

To certify the facility's compliance with OSHA workplace safety regulations

Answer

To evaluate network bandwidth utilization and capacity planning

Question 7

Which cooling strategy positions cooling units directly adjacent to high-density server racks to minimize supply air travel distance?

Accepted Answer

In-row cooling

Answer

Perimeter CRAC unit deployment

Answer

Overhead plenum cooling

Answer

Under-floor pressurized cooling