QUESTION: 21

It is assumed that EMF shielding material must be installed as the EMF levels coming from the transformer room into the computer room are measured at 100mG. The transformer room is approximately 10 meters away from the computer room and is separated by a corridor. You can assume that no physical issues are present for installing shielding material at any area/location.
Where should you recommend the shielding material to be installed?

As close as possible to the computer room
As close as possible to the transformer room
It does not matter, either close to the transformer room or the computer room is okay as there is no impact to cost or shielding material performance
Shielding is not required to be installed as 100mG is within the acceptable levels for computer rooms

Answer(s): B

Explanation:

EMF shielding is most effective when installed close to the source of the EMF, which in this case is the transformer room. Shielding at the source contains the magnetic fields before they spread, minimizing exposure throughout the facility, including the computer room.
Detailed
Placing shielding close to the EMF source minimizes the area impacted by electromagnetic interference, as it reduces the distance over which the EMF can spread. Shielding materials near the source can absorb or redirect EMF, providing the most effective reduction of EMF levels in adjacent spaces, like the data center.
EPI Data Center Specialist

Reference:

EPI data center training advises positioning shielding close to the EMF source to contain fields more effectively and reduce interference in critical areas. This method is more efficient and cost-effective, as it limits the spread of EMF from the point of origin.

Reveal Solution Next Question

QUESTION: 22

When shielding material reaches its saturation point, what will be the impact?

The shielding material will reach its optimal shielding performance state.
The shielding material will no longer be able to attenuate (reduce) additional EMF.
The shielding material will increase its permeability factor.
The shielding material will reach its maximum electrically charged state.

Answer(s): B

Explanation:

When shielding material reaches its saturation point, it can no longer effectively attenuate additional

EMF. At saturation, the material's ability to absorb or redirect magnetic fields is exhausted, meaning it cannot provide further shielding beyond this point. Additional EMF exposure would pass through the material without significant reduction.
Detailed
Saturation occurs when the material's magnetic domains are fully aligned with the magnetic field, leaving no capacity to absorb or deflect further EMF. This can happen with high EMF levels, beyond the material's design limits, resulting in a breakdown of shielding effectiveness.
EPI Data Center Specialist

Reference:

EPI guidelines on EMF management indicate that selecting appropriate shielding materials with sufficient capacity is essential to prevent saturation and ensure continuous protection. Saturation limits should be considered during design to avoid compromised shielding performance.

Reveal Solution Next Question

QUESTION: 23

The temperature in the computer room is being increased from 18°C/64°F to 27°C/81°F. What is the impact, if any, on the amount of gas required to suppress a fire assuming the gas is a Halocarbon?

The amount of gas required will be higher
The amount of gas required will not change
The amount of gas required will be lower
The change to the amount of gas cannot be determined without knowing the change in humidity as well

Answer(s): C

Explanation:

With Halocarbon fire suppression systems, as the temperature increases, the amount of gas required for effective suppression decreases. This is because Halocarbon agents are stored as a liquid and discharge as a gas, expanding more at higher temperatures. As a result, less agent is needed at higher room temperatures to achieve the desired concentration for fire suppression.
Detailed
Halocarbons rely on specific volumetric concentrations to suppress fires. Higher temperatures cause the agent to expand more rapidly, effectively filling the protected area with less agent needed to reach the required concentration. This is in contrast to some other gases, where temperature changes might not have the same effect on discharge quantities.
EPI Data Center Specialist

Reference:

EPI data center training on fire suppression indicates that understanding the physical properties of agents like Halocarbons is key for correct system sizing. As the temperature rises, the gas expands more readily, thus requiring adjustments in the amount needed for effective coverage.

Reveal Solution Next Question

QUESTION: 24

What is the advantage or disadvantage of using MPO (Multi-fiber Push On)/pre-terminated fiber?

There is no advantage, as it cannot be used with OM4 optical fiber cables.
There is no advantage, as it creates additional heat load in the data center.
It speeds up installation and provides an easy upgrade to transmission speeds up to 40 Gbit/s -100 Gbit/s.
It is a very flexible system as it can be used for both copper cables and optical fiber cables.

Answer(s): C

Explanation:

MPO (Multi-fiber Push On) pre-terminated fiber offers the advantage of quick installation and supports high-speed upgrades up to 40 Gbit/s and 100 Gbit/s. This technology simplifies connections by allowing multiple fibers to be connected in a single plug-and-play module, reducing installation time and making future expansions or upgrades to higher speeds easier.
Detailed
MPO connectors consolidate multiple fiber connections into a single interface, which simplifies cable management and reduces installation complexity. This setup is particularly beneficial in data centers where high-speed networks are essential, and where rapid deployment is necessary. MPO pre- terminated fiber also supports the use of OM4 fiber, making it compatible with existing high- performance cabling infrastructure.
EPI Data Center Specialist

Reference:

EPI training highlights that pre-terminated fiber solutions, like MPO, can greatly enhance efficiency in data centers. By reducing installation time and providing scalability for higher transmission speeds, they align with best practices for maintaining flexible and future-ready network infrastructure.

Reveal Solution Next Question

Free CDCS Exam Braindumps (page: 6)

QUESTION: 21

Explanation:

Reference:

QUESTION: 22

Explanation:

Reference:

QUESTION: 23

Explanation:

Reference:

QUESTION: 24

Explanation:

Reference: