CDCS LATEST BRAINDUMPS BOOK, VALID CDCS EXAM FORMAT

CDCS Latest Braindumps Book, Valid CDCS Exam Format

CDCS Latest Braindumps Book, Valid CDCS Exam Format

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Tags: CDCS Latest Braindumps Book, Valid CDCS Exam Format, New CDCS Test Pattern, New CDCS Study Materials, Exam CDCS Objectives Pdf

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Valid CDCS Exam Format, New CDCS Test Pattern

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EXIN EPI Certified Data Centre Specialist Sample Questions (Q21-Q26):

NEW QUESTION # 21
A computer room with a raised floor has been designed with racks in a hot/cold aisle setup.
What should you recommend for the placement of down-flow air conditioners?

  • A. Air conditioners perpendicular to (at the end of the row of) the Cold-Aisle
  • B. Air conditioners perpendicular to (at the end of the row of) the Hot-Aisle
  • C. Air conditioner placement has no influence on cooling effectiveness and efficiency. Hence, they can be placed at any convenient location.
  • D. Air conditioners should always be placed at both sides of each row of racks

Answer: A

Explanation:
In a hot/cold aisle configuration, placing down-flow air conditioners perpendicular to the cold aisle ensures that cool air is directed efficiently into the cold aisles where server intakes are located. This layout allows for optimal cooling performance by aligning the airflow directly with the equipment intakes, minimizing hot spots and enhancing cooling efficiency.
Detailed Explanation:
With a raised floor design, cold air from the air conditioners is supplied into the cold aisle, where server intakes are located. Positioning the air conditioning units perpendicular to the cold aisles ensures that cool air is delivered directly into these aisles, preventing air mixing and optimizing cooling. This setup takes full advantage of the airflow management strategy inherent to the hot/cold aisle configuration.
EPI Data Center Specialist References:
EPI guidelines on cooling emphasize that down-flow air conditioners should be positioned to maximize the effectiveness of cold aisle delivery, which improves cooling efficiency and helps maintain consistent temperatures across server racks.


NEW QUESTION # 22
When are the wet bulb and dry bulb temperatures identical?

  • A. When the relative humidity is at the best practice value for relative humidity, being 50% RH
  • B. When the dry bulb's temperature is at the lowest allowable temperature for IT equipment as per ASHRAE
  • C. When the relative humidity is 100%
  • D. When the dry bulb's temperature is at the highest allowable temperature for IT equipment as per ASHRAE

Answer: C

Explanation:
The wet bulb and dry bulb temperatures become identical when the relative humidity reaches 100%. At this point, the air is fully saturated with moisture, meaning it can no longer absorb additional water vapor. As a result, the rate of evaporation decreases, and there is no difference between the dry bulb and wet bulb temperatures.
Detailed Explanation:
The dry bulb temperature measures the air temperature, while the wet bulb temperature takes into account the cooling effect of evaporation. When relative humidity is at 100%, the air has reached its saturation point, and no further evaporation occurs. This causes both the wet bulb and dry bulb thermometers to display the same temperature reading. This condition is critical in understanding environmental conditions, particularly in HVAC and data center environments, where humidity control is essential to avoid equipment overheating or corrosion.
EPI Data Center Specialist References:
The EPI Data Center Specialist training includes understanding humidity levels and their impact on data center environments. Knowing when wet bulb and dry bulb temperatures align helps data center operators manage moisture levels effectively, which is essential for preventing issues related to high humidity, such as condensation on IT equipment.


NEW QUESTION # 23
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 = 20 log (M / R)
    Where 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 A is Attenuation M is the maximum acceptable value R is the real value measured

Answer: A

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 # 24
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. No, there is a significant difference in the formula for the different types of fire suppression gases.
  • C. Yes, as long as you change the 'S' factor of the formula to reflect the gas type used.
  • D. Yes, as long as you use the same units of measure, i.e., kg/m³ or lbs/ft³.

Answer: B

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 # 25
Do you need to consider blast protection when designing a data center?

  • A. No, blast protection is not a requirement of ANSI/TIA-942.
  • B. No, there is no reason for implementing blast protection as nobody can predict the impact of a bomb explosion.
  • C. Yes, if the data center is a potential target or the building is located within the vicinity of (close by) a potential target.
  • D. Yes, blast protection is a requirement of ANSI/TIA-942.

Answer: C

Explanation:
Blast protection should be considered if the data center or its location is a potential target or is near high-risk areas. Blast protection measures can protect both personnel and infrastructure from potential explosion impacts, which could be essential in areas with heightened security risks.
Detailed Explanation:
In areas where there may be risks of terrorist attacks or explosions due to nearby high-risk facilities, implementing blast protection measures helps safeguard the data center's infrastructure. These measures can include reinforced walls, blast-resistant windows, and secure entryways designed to withstand explosive forces.
EPI Data Center Specialist References:
While not specifically mandated by ANSI/TIA-942, EPI training advises considering local risk factors, including proximity to potential targets, when evaluating the need for blast protection. This approach is aligned with risk assessment and mitigation practices to ensure facility security.


NEW QUESTION # 26
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