CDCP - Certified Data Centre Professional Data Center Power Infrastructure Questions and Answers

Question 1

A data center manager is calculating the facility's Power Usage Effectiveness (PUE).
The total energy consumed by the data center is 500,000 kWh, and the energy consumed by the IT equipment is 350,000 kWh.
What is the PUE, and what does this value indicate?

Accepted Answer

1.43, indicating that for every 1 kWh used by IT equipment, 0.43 kWh is used by supporting infrastructure.

Answer

0.70, indicating that 70% of the total power is used by the IT equipment.

Answer

1.70, indicating a highly efficient data center with minimal overhead.

Answer

2.43, indicating that the majority of power is being consumed by non-IT infrastructure.

Question 2

Which type of UPS system provides the highest level of protection for critical data center loads by continuously regenerating a clean sine wave and having zero transfer time to battery?

Accepted Answer

Online Double-Conversion UPS

Answer

Line-Interactive UPS

Answer

Offline (Standby) UPS

Answer

Delta Conversion UPS

Question 3

A financial services company requires its critical trading servers to have redundant power from two independent UPS systems. To ensure instantaneous and seamless switching between these two power sources in the event of a failure, which device should be installed?

Accepted Answer

Static Transfer Switch (STS)

Answer

Automatic Transfer Switch (ATS)

Answer

Rack Power Distribution Unit (PDU)

Answer

Maintenance Bypass Switch (MBS)

Question 4

According to the TIA-942 standard, achieving a high level of fault tolerance and concurrent maintainability in a data center's power infrastructure typically involves which of the following design principles?

Accepted Answer

Implementing multiple, independent, and physically isolated power distribution paths.

Answer

A single power path with a high-capacity generator.

Answer

Using N+1 redundancy for UPS modules only.

Answer

Relying solely on the utility provider's service level agreement (SLA).

Question 5

In a typical data center power distribution chain, what is the primary function of a Power Distribution Unit (PDU) located within an equipment rack?

Accepted Answer

To take the power from an upstream source and distribute it to multiple devices in the rack.

Answer

To provide long-term battery backup during a utility failure.

Answer

To condition and regulate the voltage from the utility grid.

Answer

To convert AC power to DC power for the servers.

Question 6

A data center is being designed with a primary utility feed and a backup diesel generator. Which device is responsible for automatically sensing the loss of utility power and signaling the generator to start and then transferring the electrical load to the generator?

Accepted Answer

Automatic Transfer Switch (ATS)

Answer

Static Transfer Switch (STS)

Answer

Uninterruptible Power Supply (UPS)

Answer

Power Distribution Unit (PDU)

A data center manager is calculating the facility's Power Usage Effectiveness (PUE).The total energy consumed by the data center is 500,000 kWh, and the energy consumed by the IT equipment is 350,000 kWh.What is the PUE, and what does this value indicate?

A data center manager is calculating the facility's Power Usage Effectiveness (PUE).
The total energy consumed by the data center is 500,000 kWh, and the energy consumed by the IT equipment is 350,000 kWh.
What is the PUE, and what does this value indicate?