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EXIN EPI Certified Data Centre Specialist Sample Questions (Q106-Q111):

NEW QUESTION # 106
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 C
C. Data center B
D. Data center A

Answer: D

Explanation:
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.

NEW QUESTION # 107
What is the redundancy setup shown in the diagram?

A. 2+N+1
B. N+N+N
C. N+2
D. 2(N+1)

Answer: C

Explanation:
The diagram shows three UPS modules, each 100 kW, connected in parallel to support a 100 kW IT load.
That means:
* One module (100 kW) can support the load (N).
* Two additional modules are installed as redundancy.
This equals N+2 redundancy.
* 2+N+1 and 2(N+1) imply dual active paths not shown.
* N+N+N is not an industry term.
Thus, the correct redundancy level is N+2.
References: ANSI/TIA-942-B §6.2 (UPS Redundancy Models), IEC 62040-3.

NEW QUESTION # 108
Which gas-based system in general requires a larger amount of gas in order to be effective, a halocarbon gas- based fire suppression system or an inert gas-based fire suppression system?

A. Inert gas requires a smaller amount of gas compared to halocarbon gas
B. Inert gas requires a larger amount of gas compared to halocarbon gas
C. Impossible to answer without knowing the temperature
D. Inert gas and halocarbon gas require the same amount of gas

Answer: B

Explanation:
Inert gas systems (e.g., Inergen, Argonite, Nitrogen) extinguish fire by reducing oxygen concentration, which typically requires reducing oxygen levels to ~12-15%. This means a very large volume of gas must be discharged into the room (up to 40-50% of the protected volume). Because inert gases have a low extinguishing effectiveness by weight, more total gas is required.
Halocarbon agents (FM-200, Novec 1230) extinguish fire chemically by interrupting the combustion chain reaction. They require only a small percentage (6-9%) concentration in the room volume. As a result, the storage space for cylinders is much smaller compared to inert gas systems.
Therefore, inert gas systems generally require a larger gas volume to achieve extinguishing concentrations.
References: NFPA 2001 §5.4 (Agent Quantities), ISO 14520-1 §5.3, EXIN DCS Study Guide - Fire Suppression.

NEW QUESTION # 109
Which formula is correct for a three-phase system?

A. Phase-to-Phase Voltage = Phase-to-Neutral Voltage × 1.732
B. Phase-to-Phase Voltage = 1 # (Phase-to-Neutral Voltage × 1.732)
C. Phase-to-Phase Voltage = 1 # (Phase-to-Neutral Voltage ÷ 1.732)
D. Phase-to-Phase Voltage = Phase-to-Neutral Voltage ÷ 1.732

Answer: A

Explanation:
For balanced three-phase systems: where .
References: IEC 60038 (standard voltages), any power systems fundamentals text.

NEW QUESTION # 110
You are changing the design of the fire suppression system for your computer room from a halocarbon fire suppression system into an inert-based fire suppression system. Could you use the same formula to calculate the gas content for the gas?

A. Yes, as long as you take the difference between the net and gross volume into account.
B. Yes, as long as you change the 'S' factor of the formula to reflect the gas type used.
C. No, there is a significant difference in the formula for the different types of fire suppression gases.
D. Yes, as long as you use the same units of measure, i.e., kg/m³ or lbs/ft³.

Answer: C

Explanation:
The formula used to calculate the gas content differs significantly between halocarbon and inert-based fire suppression systems. Halocarbon systems function by absorbing heat, while inert systems work by reducing oxygen levels. Due to these differences in fire suppression mechanisms, distinct formulas are applied, factoring in the specific properties of each gas type and the required concentration levels.
Detailed Explanation:
Halocarbon systems like FM200 require a formula that accounts for the concentration needed for cooling, while inert gases like nitrogen or argon need a formula that calculates the volume based on oxygen displacement. As the design concentration and characteristics of these gases differ, it's essential to use the correct formula specific to the gas type.
EPI Data Center Specialist References:
EPI recommends consulting the specific design requirements and formulas provided by each gas manufacturer when switching fire suppression systems to ensure the correct amount of gas is deployed for effective fire suppression.

NEW QUESTION # 111
......

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EXIN CDCS Web-Based Practice Test: Browser-Friendly

2026 Trustable CDCS – 100% Free Exam Dumps Free | New EXIN EPI Certified Data Centre Specialist Exam Questions

EXIN EPI Certified Data Centre Specialist Sample Questions (Q106-Q111):

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