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確かな実力が身につくCDCS電子版

1年以内にCDCSテスト準備を更新し、必要なものを無料でダウンロードします。 1年後、購入者がサービスの保証を延長してお金を節約できるようにしたい場合、EXINクライアントに50％の割引特典を提供します。あなたが古いクライアントである場合、CDCS試験トレントを購入する際に特定の割引を享受できるため、より多くのサービスとより多くのメリットを享受できます。このアップデートでは、最新かつ最も有用なCDCS準備トレントを提供できます。さらに学習して、EXIN EPI Certified Data Centre SpecialistのCDCS試験に合格することができます。

EXIN CDCS 認定試験の出題範囲：

トピック
出題範囲

トピック 1

データセンターの設計と実装: このモジュールの試験では、データセンターの設計と実装を担当する Exin データセンタープロフェッショナルの知識を評価します。受験者は、スケーラビリティ、冗長性、セキュリティの考慮など、効率的なデータセンターレイアウトを作成するための重要な原則を学習します。

トピック 2

データセンターの環境配慮と効率: このセクションでは、データセンター運用における環境要因への対応と効率化の促進に関するデータセンター専門家の能力を評価します。データセンター管理者やエンジニアなどの対象者は、エネルギー効率、冷却管理、持続可能な実践を強化する対策を特定して実装する能力がテストされます。

トピック 3

データセンターのライフサイクルと標準: 試験のこのセクションでは、データセンターの専門家のスキルを測定し、計画と設計から実装と廃止まで、データセンターのライフサイクルに関係するさまざまな段階をカバーします。

>> CDCS日本語試験対策 <<

CDCS模擬問題集、CDCS日本語版と英語版

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EXIN EPI Certified Data Centre Specialist 認定 CDCS 試験問題 (Q23-Q28):

質問 # 23
An MCB needs to be installed in the PDU of an air-conditioner unit.
Which breaking curve should you select?

A. B-Curve
B. A-Curve
C. D-Curve
D. C-Curve

正解：D

解説：
For an MCB (Miniature Circuit Breaker) in the PDU of an air-conditioning unit, a C-Curve is recommended. C-Curve breakers are suitable for circuits with moderate inrush currents, such as those experienced in air conditioning units. They provide protection against overloads while accommodating the inrush without nuisance tripping.
Detailed Explanation:
C-Curve breakers trip when currents exceed 5 to 10 times the rated current, making them ideal for devices like air conditioners that experience moderate inrush currents upon startup. This characteristic provides a balance between protection and resilience against startup surges, preventing unnecessary trips while safeguarding the circuit.
EPI Data Center Specialist References:
EPI guidance for data center electrical systems specifies that C-Curve breakers are appropriate for equipment with inrush characteristics similar to air conditioning units, as they help prevent operational interruptions caused by typical surges during equipment start-up.

質問 # 24
The data center has been in operation for about 1 year and 2 months. The dust levels in the computer room are relatively high.
What is the most likely root cause?

A. Every computer room has high dust levels due to constant high-speed air movement
B. Floorboards are most likely not fitted correctly
C. The cleaning crew is not doing their work properly
D. Low pressure in the computer room

正解：B

解説：
High dust levels in a computer room are often due to improperly fitted floorboards. When floorboards are not securely installed or do not fit tightly, they allow dust and particles from the subfloor to enter the room. In a data center, this can lead to high levels of dust that affect air quality and equipment performance.
Detailed Explanation:
Raised floors in data centers can accumulate dust and debris, especially if the floorboards are not properly sealed. Loose or improperly fitted floorboards allow contaminants from the subfloor to enter the data center environment, increasing the dust levels over time. Proper installation and maintenance of floor panels are essential to prevent dust infiltration and maintain clean conditions.
EPI Data Center Specialist References:
EPI training emphasizes proper flooring installation and maintenance to control air quality within data centers. Correctly fitted floorboards prevent dust accumulation from the subfloor, which helps protect sensitive equipment and maintains a cleaner environment.

質問 # 25
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 change the 'S' factor of the formula to reflect the gas type used.
B. No, there is a significant difference in the formula for the different types of fire suppression gases.
C. Yes, as long as you take the difference between the net and gross volume into account.
D. Yes, as long as you use the same units of measure, i.e., kg/m³ or lbs/ft³.

正解：B

解説：
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.

質問 # 26
A new network storage device in a non-standard size rack of approximately 600 kg/1,300 lbs is going to be installed in the data center.
Are new floor loading calculations required?

A. No, specifications of equipment brought into the data center will already be known during the design of the data center, and therefore the floor will be able to handle it.
B. No, as long as the equipment is less than 700 kg/1,500 lbs it will be within the limits.
C. Yes, a structural engineer, approved/endorsed by the building owner, should carry out new floor loading calculations.
D. Yes, additional floor loading calculations need to be done by the floor manager, which should be verified by the safety engineer.

正解：C

解説：
For heavy equipment, such as a network storage device weighing approximately 600 kg/1,300 lbs, new floor loading calculations are indeed required, particularly since the rack is non-standard. A structural engineer, approved by the building owner, should conduct these calculations to ensure the floor can safely support the new load without risking structural integrity.
Detailed Explanation:
Data centers are designed with specific floor load ratings, which are determined during the design phase based on anticipated equipment. When adding or replacing equipment that is significantly heavy or non-standard, reassessing the floor's capacity is essential to avoid overloading. A structural engineer has the expertise to verify if the existing floor can accommodate the weight and, if not, can recommend reinforcement measures.
This step ensures compliance with safety standards and helps prevent damage to the infrastructure, which could lead to costly repairs or even catastrophic failure in extreme cases.
EPI Data Center Specialist References:
EPI Data Center Specialist training advises that any changes in the data center load, particularly involving non-standard and heavy equipment, warrant a structural assessment. Ensuring compliance with floor load capacity is a critical safety and operational concern, as underscoring data center infrastructure reliability and safety is a priority in EPI's best practices.

質問 # 27
The UPS of a data center, with an ANSI/TIA-942 Rating-4, is installed with the rectifier connected to power feed A and the bypass/reserve line input connected to power feed B.
To which feed will the output of the UPS be synchronized?

A. Depends on the setting of the UPS, as the UPS can normally be set to either feed
B. The UPS will not synchronize to any of the feeds but use an internal clock to set the output voltage and frequency
C. Feed A
D. Feed B

正解：A

解説：
For a UPS system in a Rating-4 data center, the synchronization of output can indeed depend on the specific settings of the UPS. Generally, such systems allow for flexible configuration where the output can be synchronized to either power feed A or B, depending on which feed is preferred for stability or redundancy purposes.
Detailed Explanation:
In dual-feed setups, such as those in high-redundancy data centers, the UPS can be set to synchronize with either feed. This ensures that the UPS maintains continuity in case one feed becomes unstable or fails. The flexibility to choose synchronization to either feed enhances the resiliency and reliability of power supply, which is critical in Tier IV (Rating-4) facilities where uptime is paramount.
EPI Data Center Specialist References:
The EPI Data Center Specialist course underscores the importance of configurable UPS systems in Rating-4 data centers, where redundancy and continuous power are critical. By allowing synchronization to either feed, the UPS can maintain the highest level of reliability, which aligns with the rigorous standards expected in such environments.

質問 # 28
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