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CDCS Exam Course | 100% CDCS Exam Coverage

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Free PDF CDCS - EXIN EPI Certified Data Centre Specialist Perfect Exam Course

Exam4Tests CDCS exam preparation begins and ends with your accomplishing this credential goal. Although you will take each CDCS online test one at a time - each one builds upon the previous. Remember that each CDCS Exam Preparation is built from a common certification foundation.CDCS prepareation will provide the most excellent and simple method to pass your CDCS Certification Exams on the first attempt.

EXIN EPI Certified Data Centre Specialist Sample Questions (Q60-Q65):

NEW QUESTION # 60
What is the first step in the design stage of the data center life cycle?

A. Freeze the design
B. Select vendors
C. Do a design validation
D. Define the scope of the project

Answer: D

Explanation:
The life cycle begins with planning and design. The very first step is to clearly define the project scope:
business requirements, capacity, availability targets, compliance standards, and budget. Without scope definition, design validation or vendor selection would be premature.
* Vendor selection (A) happens much later during procurement.
* Validation (B) occurs after conceptual and detailed designs are prepared.
* Freezing design (D) is the final stage before implementation.
Therefore, defining the project scope is the correct initial step.
References: ANSI/TIA-942-B Annex F (Lifecycle), ISO/IEC 30182 (Smart City & DC Lifecycle), PMI PMBOK (Scope Definition).

NEW QUESTION # 61
What is the calculation for the desired attenuation factor for shielding material?

A. A = 20 log (R / M)
Where
A is Attenuation
R is the real value measured
M is the maximum acceptable value
B. A is Attenuation
M is the maximum acceptable value
R is the real value measured
C. You do not have to calculate the attenuation factor for shielding material as it always has the same attenuation
D. A = M / R
Where
E. A = 20 log (M / R)
Where
A is Attenuation
M is the maximum acceptable value
R is the real value measured

Answer: B

Explanation:
The attenuation factor for shielding material is typically calculated using the formula A = 20 log (R / M). This equation provides the attenuation in decibels (dB), where R represents the measured electromagnetic field strength, and M is the maximum acceptable level. The logarithmic scale helps quantify how much the shielding reduces EMF levels relative to the maximum allowable value.
Detailed Explanation:
This formula calculates attenuation by comparing the measured value with the acceptable threshold, with the result expressed in decibels. A higher attenuation indicates more effective shielding material, essential for environments requiring robust EMF management.
EPI Data Center Specialist References:
EPI standards include the use of logarithmic formulas to evaluate attenuation levels, ensuring that shielding materials provide adequate reduction in EMF to protect sensitive equipment within data centers.

NEW QUESTION # 62
What is the preferred way to measure dust levels in the computer room?

A. With test coupons
B. With an air particle hand-held analyzer
C. By taking dust samples under the raised floor
D. By opening up equipment for inspection

Answer: A

Explanation:
ASHRAE TC 9.9 recommends using dust deposition coupons (also called reactivity coupons) to measure particulate contamination over time. These are small, standardized metallic plates exposed to the air that collect dust and contaminants. After a set period, they are analyzed for chemical corrosion rates and particulate buildup.
* Option A (handheld analyzers) gives spot counts of airborne particles but does not capture long-term corrosive deposition risk.
* Option C only samples underfloor plenum dust, not actual IT environment contamination.
* Option D (opening equipment) is invasive and risks voiding warranties.
Coupons provide standardized, passive, and reliable monitoring of contamination over months, making them the preferred method.
References: ASHRAE TC 9.9 "Particulate and Gaseous Contamination Guidelines," IEC 60721-3-3.

NEW QUESTION # 63
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. Review the cable lengths of each UPS to the common busbar
C. Nothing, there is no reason for any concern
D. Review the common mode noise levels within the computer room

Answer: B

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 # 64
What mainly affects the cooling capacity of a raised floor tile?

A. Percentage of the surface opening, airflow direction of the ICT equipment, temperature difference between the air intake and air exhaust of the ICT equipment, construction material of the tile
B. Relative humidity in the computer room, temperature of the cold air, pressure under the raised floor, construction material of the tile
C. Percentage of the surface opening, obstruction of the supporting construction, pressure under the raised floor, damper construction
D. Type of ICT equipment, location of the air conditioner, pressure under the raised floor, allowable temperature in the hot aisle

Answer: C

Explanation:
The cooling capacity of a raised floor tile is primarily influenced by the percentage of surface opening, the obstruction caused by the supporting construction, the pressure under the raised floor, and the damper construction. These factors dictate how much airflow can pass through the tile and how effectively cool air is distributed to the equipment in the data center.
Detailed Explanation:
The percentage of surface opening on a floor tile affects how much air can flow through, with larger openings allowing more airflow. Supporting structures beneath the floor can obstruct airflow, reducing cooling efficiency. Pressure under the raised floor impacts the velocity and volume of air that moves through the tile. Additionally, if dampers are installed, they control the airflow rate, which can be adjusted to meet specific cooling needs for the area.
EPI Data Center Specialist References:
EPI guidance on airflow management under raised floors emphasizes these factors as critical for effective cooling, especially in high-density areas. Ensuring unobstructed and adequate airflow helps maintain consistent cooling across equipment.

NEW QUESTION # 65
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