매달, 우리는 1000명 이상의 사람들이 시험 준비를 잘하고 시험을 잘 통과할 수 있도록 도와줍니다.
EXIN EPI Data Centre Foundation Certificate 온라인 연습
최종 업데이트 시간: 2026년02월14일
당신은 온라인 연습 문제를 통해 EXIN DCFC 시험지식에 대해 자신이 어떻게 알고 있는지 파악한 후 시험 참가 신청 여부를 결정할 수 있다.
시험을 100% 합격하고 시험 준비 시간을 35% 절약하기를 바라며 DCFC 덤프 (최신 실제 시험 문제)를 사용 선택하여 현재 최신 200개의 시험 문제와 답을 포함하십시오.
정답:
Explanation:
A double-conversion UPS continuously converts incoming AC to DC (via a rectifier) and back to AC (via an inverter). This isolates sensitive loads from input power disturbances. The design ensures the cleanest, most stable power supply to critical IT systems.
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Explanation:
A UPS system bridges the gap between a power outage and generator startup, providing instantaneous backup power for several minutes. It prevents downtime and protects against voltage sags or surges. UPS units ensure IT equipment runs seamlessly during transition phases.
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Explanation:
Fuel polishing removes water, microbes, and sediments from stored diesel, maintaining combustion quality and preventing engine fouling. Contaminated fuel can cause generator startup failure during emergencies. Regular polishing ensures reliable and clean energy delivery for extended runtime operations.
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Explanation:
Generator fuel systems should include redundant supply lines and storage redundancy (e.g., multiple tanks or supply routes). This prevents single-point failures during extended outages. Periodic testing, filtration, and fuel polishing also ensure diesel quality remains optimal for immediate generator start-up.
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Explanation:
Most ATS systems complete the transfer in 1C2 seconds, depending on design and generator startup time. During this brief interval, UPS systems maintain uninterrupted power to critical IT equipment. This coordination prevents data loss and equipment shutdown during source transition.
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Explanation:
The Automatic Transfer Switch (ATS) seamlessly transfers electrical load from utility to generator supply when it detects a power outage. It ensures continuous power flow by triggering generator startup automatically and switching back once utility stability is restored.
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Explanation:
Delta-Wye transformers isolate primary and secondary systems, improving fault tolerance, while Delta-Delta configurations enhance redundancy and load balance. These setups support high-efficiency distribution networks and mitigate harmonic distortions often produced by non-linear IT loads in data centres.
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Explanation:
Transformers modify voltage levels from the utility supply to match data centre distribution needs. High-voltage utility power (e.g., 11 kV or 33 kV) is stepped down to usable levels (400V/230V). This ensures
efficient transmission with minimal losses and safe distribution within the facility.
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Explanation:
Voltage stability ensures sensitive IT loads receive uniform power, while frequency consistency (usually 50/60 Hz) maintains synchrony across electrical systems. Deviations in either can lead to downtime, hardware failure, or data corruption. Data centres thus use power conditioning and monitoring equipment to mitigate risks.
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Explanation:
Data centres typically rely on the utility power grid as their main energy source due to its high-capacity and regulated voltage supply. The grid connection provides continuous power for normal operations, while backup systems such as UPS and generators act as failover protection during outages.
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Explanation:
TIA-942 remains the global reference for structured cabling in data centres. It standardizes copper and fiber layouts, rack spacing, and routing for reliability and scalability. Its topology models support both hierarchical and distributed network designs suitable for all rating levels.
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Explanation:
Dividing facilities into dedicated areas (e.g., white space, power room, MMR) enhances operational efficiency and security. Separation controls airflow zones, prevents cross-contamination, and isolates high-risk systems. This zoning ensures both physical protection and thermal optimization.
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Explanation:
Tier III and IV topologies are designed for concurrent maintainability, meaning all components can be serviced without interrupting IT operations. Tier IV goes further by ensuring fault tolerance during simultaneous failures, while Tier III maintains uptime during maintenance windows.
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Explanation:
In the N+1 model, "N" represents the minimum required components, and "+1" means one extra component available for redundancy. This ensures system resilience even if one component fails. It’s a cost-effective method to achieve higher reliability without full duplication (2N).
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Explanation:
Tier IV (Fault-Tolerant) data centres achieve 99.995% availability, capable of enduring both planned and unplanned disruptions without downtime. Dual-active power and cooling paths ensure continuous operations. They represent the highest level of infrastructure resilience and operational robustness.