Real EXIN CDCS Exam Dumps with Correct 122 Questions and Answers
Valid CDCS Test Answers & EXIN CDCS Exam PDF
NEW QUESTION # 60
An MCB needs to be installed in the PDU of an ICT rack. Which breaking curve should you select?
- A. A-Curve
- B. C-Curve
- C. B-Curve
- D. D-Curve
Answer: B
Explanation:
MCBs (Miniature Circuit Breakers) are characterized by their tripping curves:
* B-Curve: Trips at 3-5 × rated current; suitable for resistive loads.
* C-Curve: Trips at 5-10 × rated current; suitable for mixed loads including ICT equipment with moderate inrush current.
* D-Curve: Trips at 10-20 × rated current; used for heavy inductive loads like motors.
* A-Curve: Very sensitive, rarely used outside specialty electronics.
Since ICT equipment like servers and network devices have moderate inrush currents (from power supplies), the recommended breaker is C-Curve. It balances protection against nuisance tripping while still ensuring fault clearance.
References: IEC 60898-1 (Circuit Breakers for Overcurrent Protection), IEC 60947-2 (LV Breakers), EXIN DCS study material: Electrical Distribution.
NEW QUESTION # 61
A computer room needs to be fitted out with a gas-based fire suppression system. The computer room will be a high-density data center with about 30% of the racks being closed circuit cooling blade-center racks.
Should the supplier of the fire suppression system be informed on the design of the racks?
- A. No, cooling and design of racks have no influence on the fire suppression system design.
- B. Only when the racks might block access to the fire panel.
- C. Yes, the design of the racks has an influence on the fire suppression system design.
- D. Only when the rack height obstructs a potential fire suppression release point.
Answer: C
Explanation:
The design and configuration of racks, particularly high-density and closed-circuit cooling racks, directly impact the fire suppression system design. Closed-circuit cooling racks, like blade-center racks, can affect airflow and potentially trap heat, influencing how fire suppression agents are distributed within the space.
Therefore, it is essential to inform the fire suppression system supplier about the rack design to ensure effective coverage and proper agent distribution.
Detailed Explanation:
High-density racks can change how smoke and heat travel, which in turn affects fire detection and suppression. Closed racks with built-in cooling can isolate airflow, requiring adjustments in fire suppression design to ensure that suppression agents reach all necessary areas, including within enclosed spaces. The supplier may need to account for these factors to ensure proper protection coverage.
EPI Data Center Specialist References:
The EPI Data Center Specialist training underscores that fire suppression systems must be tailored to the specific environmental characteristics of the data center. The design of racks, particularly high-density configurations, should always be considered to ensure that suppression agents can effectively control a fire, even in contained rack spaces.
NEW QUESTION # 62
What is a potential disadvantage of using a hypoxic-based fire suppression system as a fire extinguishing system?
- A. It can only be used in computer rooms which have sufficient air changes per hour.
- B. It can only be used in non-continuous occupied areas.
- C. It can only be used in computer rooms where you have sufficient positive pressure.
- D. The gas containers need to be close to the hazard area.
Answer: B
Explanation:
A hypoxic-based fire suppression system works by reducing the oxygen level in a room to below what is necessary to sustain combustion. This makes it effective in fire prevention, but it is not suitable for continuous occupancy by personnel. Low oxygen levels can cause discomfort or even health risks for people spending extended periods in the space. Therefore, these systems are typically deployed in areas where continuous human occupancy is not required, such as storage rooms or data halls with limited personnel access.
Detailed Explanation:
Hypoxic fire suppression systems lower oxygen levels to around 15-16%, which is safe for short periods but not sustainable for continuous occupancy without risk to health. Data center environments where staff need to spend long periods monitoring and maintaining equipment would need alternative systems, like gas-based suppression that allows for safe evacuation rather than oxygen reduction.
EPI Data Center Specialist References:
The EPI Data Center Specialist curriculum emphasizes that fire suppression systems must be chosen based on occupancy requirements. Hypoxic systems are specifically noted as unsuitable for spaces requiring continuous human presence due to the low oxygen environment they create.
NEW QUESTION # 63
What is the first step in the design stage of the data center life cycle?
- A. Define the scope of the project
- B. Do a design validation
- C. Freeze the design
- D. Select vendors
Answer: A
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 # 64
You are allowed to use a calculator for this question.
A computer room has a net volume of approximately 2,500 m³ / 88,287 ft³.
The temperature is 20 °C / 68 °F.
The required design concentration is 7%.
The S-Factor is 0.1359 (metric) / 1.885 (imperial).
Calculate the amount of gas required for this computer room based on FM200. What is the correct weight?
- A. Approximately 820 kg / 1,800 lbs
- B. Approximately 1,390 kg / 3,000 lbs
- C. Approximately 1,640 kg / 3,600 lbs
- D. Approximately 410 kg / 900 lbs
Answer: A
Explanation:
The amount of FM200 gas required can be calculated using the formula:
Weight of Gas=Net Volume×Design Concentration×S-Factor\text{Weight of Gas} = \text{Net Volume}
\times \text{Design Concentration} \times \text{S-Factor}
Weight of Gas=Net Volume×Design Concentration×S-Factor
Using metric units:
* Net Volume: 2,500 m³
* Design Concentration: 7% (or 0.07)
* S-Factor: 0.1359
Calculation:
2,500 m3×0.07×0.1359=821.325 kg2,500 \, \text{m}^3 \times 0.07 \times 0.1359 = 821.325 \, \text{kg}2,500 m3×0.07×0.1359=821.325kg Rounded to the closest answer: 820 kg In imperial units:
* Net Volume: 88,287 ft³
* S-Factor: 1.885
Calculation:
88,287 ft3×0.07×1.885=1,165.27 lbs88,287 \, \text{ft}^3 \times 0.07 \times 1.885 = 1,165.27 \, \text{lbs}
88,287ft3×0.07×1.885=1,165.27lbs
Rounded, this is approximately 1,800 lbs.
EPI Data Center Specialist References:
EPI instructs on using specific formulas and S-factors provided by manufacturers for each gas type, ensuring that calculations reflect the correct concentration for the given room volume.
NEW QUESTION # 65
What is the floor loading requirement for a Rated-3 data center according to ANSI/TIA-942?
- A. 7.2 kPa
- B. 15 kPa
- C. 12 kPa
- D. 8.4 kPa
Answer: C
Explanation:
ANSI/TIA-942 specifies minimum floor live load capacities based on Rated levels:
* Rated-1/2: ~7.2-8.4 kPa
* Rated-3: 12 kPa
* Rated-4: 15 kPa
These values ensure raised floors can support racks, cabling trays, cooling units, and maintenance loads without structural compromise. For Rated-3, concurrent maintainability requires higher floor robustness to handle additional infrastructure.
Therefore, the correct requirement is 12 kPa.
References: ANSI/TIA-942-B §6.3.5 (Floor Loading), CISCA Raised Floor Design Guide.
NEW QUESTION # 66
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 cable lengths of each UPS to the common busbar
- B. Nothing, there is no reason for any concern
- C. Review the common mode noise levels within the computer room
- D. Review the harmonics levels within the computer room
Answer: A
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 # 67
What is the calculation for the desired attenuation factor for shielding material?
- A. You do not have to calculate the attenuation factor for shielding material as it always has the same attenuation
- B. A = 20 log (M / R)
Where A is Attenuation M is the maximum acceptable value R is the real value measured - C. A = 20 log (R / M)
Where A is Attenuation R is the real value measured M is the maximum acceptable value - D. A = M / R
Where A is Attenuation M is the maximum acceptable value R is the real value measured
Answer: C
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 # 68
A 5kW (power consumption) server keeps crashing with the message 'temperature too high'.
The intake temperature is measured at 25 °C/77 °F and a relative humidity (RH) level of 50%.
The exhaust temperature is 29 °C/84 °F and 45% RH.
The raised floor is providing an adequate amount of CFM/CMH at a reasonable velocity.
The pressure under the raised floor is approximately 25 Pa/0.1 inch H₂O.
Analyze the situation and indicate what the most likely cause is for this server to crash.
- A. Dust inside the server causing issues with convection-based heat transfer
- B. The raised floor pressure is too low and/or the raised floor tile % opening is not adequate
- C. No cause could be determined as the CFM/CMH of the air conditioning equipment is not stated
- D. The exhaust temperature is exceeding the ASHRAE recommended values
Answer: A
Explanation:
The server's repeated overheating despite adequate intake and exhaust temperatures suggests that dust buildup inside the server may be impeding heat transfer. Dust accumulation can obstruct airflow within the server, insulate components, and disrupt the convection-based cooling systems that regulate internal temperatures, leading to overheating and potential hardware failures.
Detailed Explanation:
While the intake and exhaust temperatures appear within acceptable ranges, internal dust can reduce airflow and impede cooling efficiency, causing internal components to overheat despite seemingly normal ambient conditions. Regular cleaning and maintenance are critical for preventing dust-related issues, especially in high-powered equipment like a 5kW server.
EPI Data Center Specialist References:
EPI emphasizes regular maintenance to prevent dust buildup in data center equipment. Dust can significantly impact cooling efficiency and lead to overheating, which underlines the importance of routine cleaning for optimal server performance.
NEW QUESTION # 69
EMF shielding material needs to be installed as EMF levels from the transformer room into the computer room are measured at 100 mG. The transformer room is ~10 meters away, separated by a corridor. Where should shielding be installed?
- A. Shielding is not required as 100 mG is within acceptable levels
- B. As close as possible to the transformer room
- C. As close as possible to the computer room
- D. It does not matter; either close to the transformer room or computer room is okay
Answer: B
Explanation:
The most effective EMF mitigation is to install shielding as close as possible to the source of radiation. By blocking or redirecting magnetic flux at the origin (the transformer room walls), the overall field propagation into adjacent areas is minimized. If shielding were placed at the computer room, the field would already have spread over the intervening space, requiring more material and higher cost.
Standards such as IEEE Std 299 (EMC Shielding Effectiveness) and IEC 61000 emphasize source-based mitigation. Additionally, ANSI/TIA-942 requires EMF shielding where magnetic flux exceeds recommended ICT thresholds (generally <5 mG for sensitive tape/disk storage).
Although 100 mG is often tolerated by modern equipment, legacy magnetic storage can be affected, so shielding is still prudent. Hence, the correct location is at the transformer room wall.
References: IEEE Std 299 (EMI Shielding), ANSI/TIA-942-B §6.6.4 (EMF Requirements), IEC 61000 EMC standards.
NEW QUESTION # 70
A data center requires an audit to find out whether it conforms with ANSI/TIA-942 Rated-3 (concurrently maintainable).
Will the network architecture be part of this audit?
- A. Yes, but only if the network administration does not comply with ANSI/TIA-606.
- B. Yes, amongst other aspects, the network architecture should be Rated-3 compliant with the requirements of ANSI/TIA-942.
- C. No, only the type of cabling used will be audited.
- D. No, as concurrently maintainable only applies to electrical and mechanical (power and cooling).
Answer: B
Explanation:
For a Rated-3 data center, network architecture is indeed a key component of the audit under ANSI/TIA-942.
This rating requires concurrent maintainability across all systems, including telecommunications infrastructure. The network architecture must therefore meet specific redundancy and reliability standards to ensure uninterrupted operations during maintenance or failure of any single component.
Detailed Explanation:
Rated-3 requirements extend beyond electrical and mechanical systems to include network architecture. This ensures that telecommunications systems are also designed for concurrent maintainability, thus contributing to overall uptime and resilience.
EPI Data Center Specialist References:
EPI endorses comprehensive assessments for Rated-3 facilities, emphasizing that network systems must meet standards for redundancy and concurrent maintainability, which align with ANSI/TIA-942's holistic approach to data center reliability.
NEW QUESTION # 71
Two servers stacked with no gap (metal-to-metal). What heat transfer occurs?
- A. Convection
- B. No heat transfer
- C. Conduction
- D. Radiation
Answer: C
Explanation:
Heat transfer occurs in three modes: conduction, convection, radiation. Conduction is transfer by direct contact of solids. Since the servers are touching metal-to-metal, heat flows directly from the warmer surface to the cooler one via conduction.
* Radiation occurs without contact, across air or vacuum.
* Convection requires a fluid medium like air, which is absent between surfaces.
* "No heat transfer" is incorrect-there will always be transfer.
Therefore, the unwanted transfer here is conduction.
References: ASHRAE Fundamentals - Heat Transfer Basics, EXIN DCS Thermal Management Section.
NEW QUESTION # 72
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 and halocarbon gas require the same amount of gas
- C. Inert gas requires a larger amount of gas compared to halocarbon gas
- D. Impossible to answer without knowing the temperature
Answer: C
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 # 73
The building in which the computer room is housed is required to have a sprinkler system. The building is therefore equipped with a wet pipe system.
What action, if any, should you recommend for the computer room?
- A. Replace the wet pipe system with a dry pipe system.
- B. Replace the wet pipe system with a pre-action system.
- C. Maintain the current wet pipe system.
- D. Replace the wet pipe system with a deluge system.
Answer: B
Explanation:
In computer rooms, replacing a wet pipe system with a pre-action system is advisable. Pre-action systems provide additional protection by requiring two triggers (e.g., heat and smoke) before water is released, minimizing the risk of accidental discharge and water damage, which is crucial for safeguarding sensitive IT equipment.
Detailed Explanation:
Wet pipe systems contain water in the pipes at all times, which poses a higher risk of accidental discharge. Pre-action systems, however, only fill the pipes with water upon detection of a fire, reducing the risk of water-related damage due to leaks or malfunctions. This approach is considered best practice for environments housing sensitive electronic equipment.
EPI Data Center Specialist References:
EPI advises using pre-action fire suppression in data centers to reduce risks associated with accidental water release, providing a safer and more controlled fire response that better protects critical infrastructure.
NEW QUESTION # 74
What is a significant difference between a halocarbon gas-based fire suppression system and an inert gas-based fire suppression system?
- A. Inert gas harms the environment and halocarbon gas does not.
- B. Inert gas has smaller-sized gas containers than halocarbon gas.
- C. Halocarbon gas works on the basis of oxygen reduction and inert gas works on the basis of heat removal.
- D. Halocarbon gas works on the basis of heat removal and inert gas works on the basis of oxygen reduction.
Answer: D
Explanation:
A halocarbon gas-based fire suppression system primarily extinguishes fires through heat absorption. In contrast, an inert gas-based system works by reducing oxygen levels to a point where combustion cannot be sustained. Halocarbon agents, like FM-200, absorb heat from the fire, cooling it down, whereas inert gases, like nitrogen or argon, lower oxygen concentration.
Detailed Explanation:
Halocarbons are effective in quickly cooling flames and are suitable for electronic environments due to their fast action. Inert gases displace oxygen to suppress fires, making them ideal in occupied spaces where human safety can be managed during a fire event due to slower discharge times.
EPI Data Center Specialist References:
EPI training distinguishes between these suppression mechanisms, noting the importance of selecting the correct system based on specific needs like quick response versus oxygen displacement for environments with sensitive equipment.
NEW QUESTION # 75
The noise levels in the data center are approximately 91 dB (A).
Do employers need to take precautions?
- A. As long as the data is compliant to ISO/IEC 27001 it is acceptable.
- B. No, anything less than 100 dB (A) is acceptable.
- C. Yes, since it is mandated by regulations.
- D. There are no regulations regarding noise levels inside a building. Regulations only apply to noise pollution outside of the building.
Answer: C
Explanation:
In a data center with noise levels of 91 dB (A), employers are indeed required to take precautions to protect personnel, as this level exceeds commonly accepted safety thresholds for occupational noise exposure. Regulations, such as those from the Occupational Safety and Health Administration (OSHA) or similar agencies, mandate specific controls and protections for environments with high noise levels.
Detailed Explanation:
Noise levels above 85 dB (A) typically trigger requirements for hearing conservation programs. At 91 dB (A), steps like providing ear protection, conducting regular noise assessments, and possibly implementing engineering controls to reduce noise should be taken. Extended exposure to such levels can lead to hearing loss, so regulatory compliance ensures both immediate and long-term protection for personnel.
EPI Data Center Specialist References:
EPI guidelines for data center safety address noise exposure as part of the environmental safety measures. EPI recommends adhering to local occupational health regulations, as excessive noise can harm personnel and affect operational efficiency due to potential health hazards.
NEW QUESTION # 76
What is the risk of high levels of hydrogen sulfide (H#S) in the computer room?
- A. H#S can cause corrosion which impacts reliability of equipment
- B. H#S impacts the static properties of the floor
- C. There is no risk
- D. H#S impacts gas-based fire suppression system operation
Answer: A
Explanation:
Hydrogen sulfide (H#S) is a corrosive gas that readily reacts with metals, especially copper and silver found in circuit boards, connectors, and power supply components. Even at concentrations below human detection thresholds, H#S can cause sulfidation corrosion leading to intermittent connections, failure of solder joints, and increased failure rates of electronic equipment.
ASHRAE Technical Committee 9.9 has documented multiple failures in data centers due to corrosive gases (notably sulfur-bearing compounds). Therefore, high humidity combined with H#S presence accelerates this risk.
H#S does not affect static flooring properties (B) or fire suppression agent chemistry (D). Option A is clearly incorrect as the risk is well-documented.
References: ASHRAE TC 9.9 "Particulate and Gaseous Contamination Guidelines" (2011), IEC 60721-3 (Environmental Classification).
NEW QUESTION # 77
In order to save energy, you are going to install an automated system to switch off lights. What should be taken into consideration when installing such a system?
- A. The system should not be based on motion detection as the lights might suddenly switch off while staff is still at work.
- B. It is not advisable to use such a system since it will reduce the lifetime of LED lighting.
- C. Security guards should perform regular inspections verifying the system works.
- D. At all times, the levels should allow for security cameras to function properly.
Answer: D
NEW QUESTION # 78
A data center scores Rated-3 in mechanical, Rated-4 in electrical, and Rated-2 in telecommunications. What is the overall rating?
- A. Rated-2
- B. Rated-4
- C. Rated-4 since electrical is most important
- D. Depends on architectural rating
Answer: A
Explanation:
ANSI/TIA-942 defines that the lowest rating across all four categories determines the overall facility rating. A facility cannot claim a higher overall level unless all subsystems meet or exceed that level.
In this case:
* Mechanical = Rated-3
* Electrical = Rated-4
* Telecommunications = Rated-2
Since telecommunications only meets Rated-2, the overall facility is Rated-2, regardless of higher scores elsewhere.
This ensures that weak areas (like cabling) are not ignored, because they can compromise overall availability.
References: ANSI/TIA-942-B §5.2.3 (Overall rating determination).
NEW QUESTION # 79
The pipes of a VESDA smoke detection system are installed at the air intake of the air conditioner inside the computer room.
Is this a good practice from an early smoke detection point of view?
- A. No, the piping should be installed at the air exhaust of the air conditioner, as there can also be a fire inside the air conditioner itself.
- B. Yes, as this reduces the amount of piping to be installed in the data center, as all air will go through the air conditioner.
- C. No, it will give a longer reaction time for the smoke detection system and there might also be bypass airflow.
- D. It depends on the type of gas-based fire suppression which will be installed.
Answer: C
Explanation:
For optimal early smoke detection in a data center, it is crucial that the Very Early Smoke Detection Apparatus (VESDA) system be installed at locations where smoke will be detected as soon as it appears. Positioning the VESDA pipes at the air intake of the air conditioner inside the computer room is not ideal. This placement could result in a delayed detection response and the potential for bypass airflow to occur, which would impede the system's ability to detect smoke effectively.
Detailed Explanation:
When VESDA pipes are installed at the air intake, the detection system relies on the smoke to be drawn into the air conditioning unit before detection can occur. This setup increases the reaction time as the smoke has to travel through the intake and get processed by the air conditioner. Furthermore, bypass airflow-a phenomenon where not all the air containing smoke particles passes through the VESDA pipes-could also delay or even prevent the system from detecting smoke early.
Ideally, VESDA pipes should be positioned where smoke is likely to accumulate first, such as near the ceiling or in the return airflow path to detect smoke at the earliest possible stage. This ensures that the detection system can quickly trigger alarms, providing more time to address potential fire hazards.
EPI Data Center Specialist References:
EPI Data Center Specialist training highlights that smoke detection should prioritize early response capabilities to maximize safety. The preferred installation for VESDA pipes is generally at points where smoke would naturally accumulate, rather than relying on air conditioning intakes where airflow can vary and delay detection. In their course materials, EPI emphasizes minimizing reaction time and reducing the impact of airflow dynamics on smoke detection efficiency.
NEW QUESTION # 80
Can you install a raised floor tight to the perimeter of the room?
- A. Yes, a raised floor needs to be installed tight to the perimeter to prevent air leakage
- B. No, to avoid damage to the raised floor due to building and hygrothermal movement
- C. No, but this applies only to raised floors with a height of over 90 cm (3 ft)
- D. Yes, but only if the data center is located in Zone 0 with no or little seismic activity
Answer: B
Explanation:
Raised floors must not be installed flush against perimeter walls. Buildings expand, contract, and shift due to thermal expansion (hygrothermal movement), structural settlement, and seismic activity. If the raised floor is rigidly connected to the walls, this movement transfers directly into the raised floor grid, causing buckling, cracking, or tile misalignment.
Industry standards (e.g., CISCA - Ceilings & Interior Systems Construction Association guidelines) require leaving a small perimeter gap (typically 1-2 cm) between raised floor tiles and walls. This gap is then sealed with flexible firestops or brush gaskets to control air leakage while preserving movement tolerance.
Therefore, the correct practice is to leave a separation space, making answer C correct. Options A and D restrict this requirement incorrectly, while B is factually wrong (sealing against the perimeter is not allowed).
References: CISCA Raised Floor Installation Guidelines, ANSI/TIA-942-B §6.3 (Flooring and Seismic Considerations).
NEW QUESTION # 81
It is assumed that EMF shielding material must be installed as the EMF levels coming from the transformer room into the computer room are measured at 100mG. The transformer room is approximately 10 meters away from the computer room and is separated by a corridor. You can assume that no physical issues are present for installing shielding material at any area/location.
Where should you recommend the shielding material to be installed?
- A. It does not matter, either close to the transformer room or the computer room is okay as there is no impact to cost or shielding material performance
- B. As close as possible to the transformer room
- C. As close as possible to the computer room
- D. Shielding is not required to be installed as 100mG is within the acceptable levels for computer rooms
Answer: B
Explanation:
EMF shielding is most effective when installed close to the source of the EMF, which in this case is the transformer room. Shielding at the source contains the magnetic fields before they spread, minimizing exposure throughout the facility, including the computer room.
Detailed Explanation:
Placing shielding close to the EMF source minimizes the area impacted by electromagnetic interference, as it reduces the distance over which the EMF can spread. Shielding materials near the source can absorb or redirect EMF, providing the most effective reduction of EMF levels in adjacent spaces, like the data center.
EPI Data Center Specialist References:
EPI data center training advises positioning shielding close to the EMF source to contain fields more effectively and reduce interference in critical areas. This method is more efficient and cost-effective, as it limits the spread of EMF from the point of origin.
NEW QUESTION # 82
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. Yes, additional floor loading calculations need to be done by the floor manager, which should be verified by the safety engineer.
- C. Yes, a structural engineer, approved/endorsed by the building owner, should carry out new floor loading calculations.
- D. No, as long as the equipment is less than 700 kg/1,500 lbs it will be within the limits.
Answer: C
Explanation:
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.
NEW QUESTION # 83
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