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EXIN CDCS Valid Mock Test | Accurate CDCS Study Material
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Tech firms award high-paying job contracts to EXIN EPI Certified Data Centre Specialist (CDCS) certification holders. Every year many aspirants appear in the CDCS test of the certification, but few of them cannot crack it because of not finding reliable EXIN EPI Certified Data Centre Specialist prep materials. So, you must prepare with real exam questions to pass the certification exam. If you don't rely on actual exam questions, you will fail and loss time and money.
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EXIN EPI Certified Data Centre Specialist Sample Questions (Q114-Q119):
NEW QUESTION # 114
From the options indicated, what is the correct starting point for the raised floor installation?
- A. Point A
- B. Point B
- C. Point D
- D. Point C
Answer: B
Explanation:
When installing a raised floor, the best starting point is typically from the farthest corner away from the entrance, in this case, Point B. This method allows for the floor installation to progress towards the entrance, ensuring that workers can avoid walking over the newly installed tiles, thus minimizing the risk of damage and maintaining cleanliness during installation.
Detailed Explanation:
Starting at the farthest corner (Point B) and working towards the entrance (Point A) is a standard practice in raised floor installation. This approach ensures that installers do not walk over freshly laid tiles, which could lead to shifting or misalignment. Additionally, it allows for more controlled placement and alignment, as well as convenient egress when installation is complete.
EPI Data Center Specialist References:
EPI guidelines for raised floor installation emphasize beginning at the farthest point from the entrance and working back towards it, which aligns with industry best practices for efficiency and quality assurance. This method reduces potential damage and supports precise alignment across the floor area.
NEW QUESTION # 115
What is a disadvantage of hypoxic-based fire suppression?
- A. Gas containers must be close to hazard
- B. Only usable in non-occupied areas
- C. Only usable with positive pressure rooms
- D. Only usable in rooms with sufficient air changes
Answer: B
Explanation:
Hypoxic systems continuously lower oxygen concentration (~15%) to prevent combustion. While safe for short-term human exposure, standards like ISO 20338 recommend they are not suitable for continuously occupied spaces, because reduced oxygen may cause fatigue, reduced cognition, and health risks for staff.
* B is irrelevant-air change rates affect dilution, not feasibility.
* C is incorrect-tanks can be remote.
* D is false-positive pressure is not required.
Thus, the main disadvantage is restriction to non-continuous occupancy.
References: ISO 20338 (Oxygen Reduction Systems), NFPA 770.
NEW QUESTION # 116
A computer room needs to be fitted out with a gas-based fire suppression system. The computer room will be a high-density data center with about 30% of the racks being closed circuit cooling blade-center racks.
Should the supplier of the fire suppression system be informed on the design of the racks?
- A. Yes, the design of the racks has an influence on the fire suppression system design.
- B. Only when the racks might block access to the fire panel.
- C. No, cooling and design of racks have no influence on the fire suppression system design.
- D. Only when the rack height obstructs a potential fire suppression release point.
Answer: A
Explanation:
The design and configuration of racks, particularly high-density and closed-circuit cooling racks, directly impact the fire suppression system design. Closed-circuit cooling racks, like blade-center racks, can affect airflow and potentially trap heat, influencing how fire suppression agents are distributed within the space. Therefore, it is essential to inform the fire suppression system supplier about the rack design to ensure effective coverage and proper agent distribution.
Detailed Explanation:
High-density racks can change how smoke and heat travel, which in turn affects fire detection and suppression. Closed racks with built-in cooling can isolate airflow, requiring adjustments in fire suppression design to ensure that suppression agents reach all necessary areas, including within enclosed spaces. The supplier may need to account for these factors to ensure proper protection coverage.
EPI Data Center Specialist References:
The EPI Data Center Specialist training underscores that fire suppression systems must be tailored to the specific environmental characteristics of the data center. The design of racks, particularly high-density configurations, should always be considered to ensure that suppression agents can effectively control a fire, even in contained rack spaces.
NEW QUESTION # 117
You have three UPS systems connected in parallel. The UPS systems have an imbalance in the load sharing of approximately 20%.
What should you recommend?
- A. Review the harmonics levels within the computer room
- B. Nothing, there is no reason for any concern
- C. Review the common mode noise levels within the computer room
- D. Review the cable lengths of each UPS to the common busbar
Answer: D
Explanation:
An imbalance in load sharing between UPS systems connected in parallel can often result from unequal cable lengths to the common busbar. If the cabling from each UPS to the busbar varies significantly in length, it can lead to differences in impedance, resulting in uneven load distribution. Ensuring that cable lengths are consistent helps to balance the load sharing across the UPS systems.
Detailed Explanation:
Parallel UPS systems rely on uniform impedance to share loads evenly. Differences in cable lengths cause variations in resistance, leading to one or more UPS units carrying a disproportionate share of the load. Standardizing cable lengths ensures equal impedance, which promotes balanced load sharing and prevents one UPS from being overburdened, thus maintaining overall system reliability.
EPI Data Center Specialist References:
EPI guidelines recommend checking cable lengths when load imbalances occur in parallel UPS configurations. Ensuring equal lengths is a common method to resolve impedance issues that affect load distribution, which is critical for the stable operation of redundant power systems.
NEW QUESTION # 118
A data center has its own power supply from the public utility and receives chilled water supply from the building owner.
What needs to be taken into consideration when calculating the PUE?
- A. You will need to take a weight factor of 0.4 for district chilled water into consideration
- B. PUE calculations are not possible in shared buildings
- C. Nothing, as the chiller plant in the building also uses electrical power
- D. You will need to take the value for COP of the chiller plant into consideration
Answer: A
Explanation:
When calculating Power Usage Effectiveness (PUE) in a data center that uses chilled water from an external source, like from a building owner, a weight factor for district chilled water must be applied. This is because PUE calculations aim to measure the energy efficiency of the data center's own operations, and external utilities like district chilled water aren't directly powered by the data center. A weight factor of 0.4 is typically used to account for the energy consumed to produce and deliver the chilled water, reflecting the indirect impact on the data center's total energy consumption.
Detailed Explanation:
PUE is calculated as the ratio of the total facility energy to the IT equipment energy. If the cooling is provided by an external chilled water source, it's necessary to adjust the calculations to accurately reflect the energy impact. By incorporating the 0.4 weight factor, data centers can calculate a more accurate PUE, aligning with standard methods and industry best practices.
EPI Data Center Specialist References:
EPI training on PUE highlights the importance of adjusting for external energy sources, such as district cooling, in the calculations. This ensures that PUE values remain accurate and comparable across different data centers, even when external utilities are used.
NEW QUESTION # 119
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