CDCS PDF - CDCS Simulationsfragen

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CDCS Simulationsfragen - CDCS Prüfungsvorbereitung

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EXIN EPI Certified Data Centre Specialist CDCS Prüfungsfragen mit Lösungen (Q15-Q20):

15. Frage
You are allowed to use a calculator for this question. A battery bank is rated at a total capacity of 600 Ah. Calculate how much charging current the rectifier should be able to supply as charging current.

A. 80 Amperes
B. 12 Amperes
C. 60 Amperes
D. 30 Amperes

Antwort: D

Begründung:
To determine the charging current for a battery bank, a general rule of thumb is that the charging current should be 5% of the total battery capacity. For a battery rated at 600 Ah, this calculation would be:
600 Ah×0.05=30 Amperes600 , ext{Ah} imes 0.05 = 30 , ext{Amperes}600Ah×0.05=30Amperes This ensures the battery is charged efficiently without overloading the rectifier or risking battery damage.
Detailed Explanation:
Battery charging current is typically set as a percentage of the battery's capacity to balance effective charging with longevity and safety. A 5% charging rate is standard for lead-acid batteries, which would be 30 Amperes for a 600 Ah battery bank.
EPI Data Center Specialist References:
EPI standards recommend calculating charging currents based on a percentage of the battery capacity to ensure safety and efficiency, aligning with best practices for battery management in data centers.

16. Frage
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?

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

Antwort: B

Begründung:
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 Explanation:
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 References:
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.

17. Frage
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?

A. 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
B. Shielding is not required to be installed as 100mG is within the acceptable levels for computer rooms
C. As close as possible to the transformer room
D. As close as possible to the computer room

Antwort: C

Begründung:
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 Explanation:
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 References:
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.

18. Frage
What precaution shall be taken for cabling leading into an equipment rack when a data center is in a seismic-prone area?

A. Cables shall be tightly organized to the rack and trays to avoid movement.
B. Cables can be organized in any way as it is not important.
C. Cables should be loosely organized to allow for movement and be latched at the connectors.
D. Cables should be replaced by busbar trunking.

Antwort: A

Begründung:
In seismic-prone areas, cables should be tightly secured to racks and cable trays to minimize movement during seismic activity. Properly securing the cables prevents them from being damaged due to excessive motion, which could lead to outages or damage to connected equipment.
Detailed Explanation:
Loose cables can be vulnerable to shaking or sudden jolts during an earthquake, increasing the risk of disconnection or damage. By tightly organizing and securing cables, you ensure they remain in place, even during significant movement, thereby maintaining connection integrity and reducing the risk of physical damage.
EPI Data Center Specialist References:
EPI training includes considerations for data centers in seismic zones, advising that cables be firmly anchored to support structures to reduce movement and mitigate potential damage during seismic events.

19. Frage
Three data centers are benchmarked on facilities energy efficiency.
Data center A has achieved a PUE of 2.45.
Data center B has achieved a PUE of 1.20.
Data center C has achieved a PUE of 1.90.
Which of the data centers is operating at the highest facility efficiency?

A. PUE does not indicate efficiency
B. Data center A
C. Data center B
D. Data center C

Antwort: B

Begründung:
A Power Usage Effectiveness (PUE) of 1.20 (achieved by Data Center B) indicates the highest facility efficiency among the three data centers. A lower PUE value signifies better energy efficiency, as it means that a greater proportion of the total energy consumed is used directly for IT equipment rather than for cooling, lighting, or other facility needs.
Detailed Explanation:
PUE is calculated as the ratio of total facility energy to IT equipment energy. A PUE close to 1.0 suggests that almost all the energy is dedicated to computing processes, with minimal overhead. With PUE values of 2.45, 1.20, and 1.90, Data Center B (1.20) operates most efficiently by devoting a higher percentage of its total energy to IT equipment.
EPI Data Center Specialist References:
The EPI curriculum emphasizes PUE as a key metric for data center efficiency, with lower values representing better performance. Achieving a PUE near 1.0 aligns with industry best practices for energy-efficient data center design and operation.

20. Frage
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Wir RealVCE EXIN CDCS Premium VCE-Datei wird die klügste Wahl für alle IT-Mitarbeiter, die Vorberetiung für EXIN CDCS Prüfungen treffen.

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CDCS PDF - CDCS Simulationsfragen

CDCS Simulationsfragen - CDCS Prüfungsvorbereitung

EXIN EPI Certified Data Centre Specialist CDCS Prüfungsfragen mit Lösungen (Q15-Q20):

CDCS neuester Studienführer & CDCS Training Torrent prep

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