[Feb 03, 2026] CDCS Dumps Full Questions - Exam Study Guide
EPI Data Centre Free Certification Exam Material from Free4Torrent with 122 Questions
EXIN CDCS Exam Syllabus Topics:
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NEW QUESTION # 30
What is the minimum requirement for the power feeds to the building for a Rated-3 data center based on the ANSI/TIA-942 standard?
- A. Two feeds entering the data center building from one substation
- B. Two feeds coming from two different substations, one power company is acceptable
- C. Two feeds coming from two different substations, one power company is not acceptable
- D. One feed from one substation split over two separated distribution boards in separate rooms
Answer: B
Explanation:
The minimum requirement for power feeds to a Rated-3 data center according to ANSI/TIA-942 is to have two independent power feeds, which can come from two different substations provided by the same power company. This ensures redundancy and concurrent maintainability, as each feed can support the load independently during maintenance or failure of the other.
Detailed Explanation:
The separation by two substations ensures resilience in case of a localized outage or substation maintenance, aligning with Rated-3 requirements for uninterrupted operation. ANSI/TIA-942 permits these feeds from a single utility provider as long as they are supplied from distinct substations.
EPI Data Center Specialist References:
EPI underscores the importance of dual power feeds from separate substations for Rated-3 facilities, highlighting that the ability to draw from different substations aligns with redundancy requirements for high availability.
NEW QUESTION # 31
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. Security guards should perform regular inspections verifying the system works.
- B. It is not advisable to use such a system since it will reduce the lifetime of LED lighting.
- C. The system should not be based on motion detection as the lights might suddenly switch off while staff is still at work.
- D. At all times, the levels should allow for security cameras to function properly.
Answer: D
Explanation:
When installing an automated lighting system, especially in a security-sensitive area like a data center, it's essential to ensure that lighting levels support security camera functionality at all times. Sufficient lighting is necessary for cameras to capture clear footage, ensuring continuous monitoring and security regardless of occupancy.
Detailed Explanation:
Automated lighting based on occupancy or time settings can reduce energy costs, but it must be configured to maintain adequate illumination for surveillance. Security cameras require minimum lighting levels to operate effectively, so lighting should be configured to avoid compromising security.
EPI Data Center Specialist References:
EPI emphasizes security and safety in data centers, advising that lighting systems should maintain levels conducive to effective surveillance, ensuring operational security even when lights are automatically controlled.
NEW QUESTION # 32
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, amongst other aspects, the network architecture should be Rated-3 compliant with the requirements of ANSI/TIA-942.
- B. No, only the type of cabling used will be audited.
- C. No, as concurrently maintainable only applies to electrical and mechanical (power and cooling).
- D. Yes, but only if the network administration does not comply with ANSI/TIA-606.
Answer: A
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 # 33
The air intake of the mission-critical server at the top of the rack is measuring 25 °C/77 °F.
Is this acceptable?
- A. No, the temperature needs to be 20 °C/68 °F
- B. Depends on the ANSI/TIA-942 Rating the data center needs to comply with
- C. Yes, this is allowed according to the standards and guidelines
- D. As long as it does not exceed the average server room temperature of 38 °C/100 °F
Answer: C
Explanation:
An air intake temperature of 25 °C (77 °F) at the top of the rack is acceptable according to data center standards and guidelines, such as those from ASHRAE. This temperature falls within the recommended range for inlet temperatures, which is typically between 18°C (64°F) and 27°C (81°F).
Detailed Explanation:
ASHRAE standards provide guidelines on acceptable temperature ranges for air intake in data centers to balance cooling efficiency and equipment safety. A temperature of 25°C is within the recommended operational range, allowing data centers to optimize energy efficiency while maintaining safe conditions for IT equipment.
EPI Data Center Specialist References:
EPI guidelines align with ASHRAE recommendations for server intake temperatures, confirming that 25°C is within acceptable limits for most mission-critical equipment. This ensures the data center maintains an efficient and reliable environment.
NEW QUESTION # 34
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 1,390 kg / 3,000 lbs
- B. Approximately 820 kg / 1,800 lbs
- C. Approximately 410 kg / 900 lbs
- D. Approximately 1,640 kg / 3,600 lbs
Answer: B
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}2,500m3×0.07×0.1359=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 # 35
Do all residual current devices (RCDs) use the same operating principle?
- A. No, ELCB measures earth voltage, whereas RCD detects current differences
- B. Yes, they all detect current differences on live and neutral wire
- C. No, depending on regulations some use thermal-magnetic operation
- D. Yes, they all measure voltage on the earth conductor
Answer: A
Explanation:
Residual current protection has evolved:
* ELCB (Earth Leakage Circuit Breaker): Older type; voltage-operated. It trips when voltage develops between earth and exposed metal.
* RCD/RCCB (Residual Current Device/Circuit Breaker): Current-operated. It detects imbalance between live and neutral conductors (indicating leakage current to earth).
Modern data centers use RCDs/RCCBs exclusively, since ELCBs are obsolete and unreliable if multiple earth connections exist. Thermal-magnetic breakers (D) provide overcurrent protection, not earth leakage.
Thus, not all residual current devices are based on the same principle.
References: IEC 61008, IEC 61009 (RCCB/RCD definitions), IEC 60364 (Electrical Installations - Protective Measures).
NEW QUESTION # 36
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 highest 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 lowest 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 # 37
Do you need to consider bullet (ballistics) protection when designing a data center?
- A. Bullet (ballistics) protection is only required when the data center is located in an area with a high crime rate.
- B. Bullet (ballistics) protection is required by ANSI/TIA-942 for data centers Rated 3/4.
- C. Bullet (ballistics) protection is only required if the facility is a potential target or the building is in the vicinity of a potential target.
- D. Bullet (ballistics) protection is required by ANSI/TIA-942 for all data centers.
Answer: C
Explanation:
Bullet (ballistics) protection is typically considered only for data centers that are potential targets or located near such targets. While ANSI/TIA-942 does not specifically require bulletproofing for all data centers, it is prudent to consider it based on location risk assessments, especially if the facility is in a high-risk area or near critical infrastructure that could attract threats.
Detailed Explanation:
Protective measures like bulletproofing depend on the threat landscape and the data center's exposure to risks such as crime or terrorism. Assessments for physical security are typically customized based on location-specific risks rather than being universally required by data center standards.
EPI Data Center Specialist References:
EPI guidelines emphasize customizing physical security measures based on threat assessments, suggesting that bulletproofing is appropriate in specific circumstances where the facility's risk profile justifies additional security measures.
NEW QUESTION # 38
What is the redundancy setup shown in the diagram?
- A. N+N+N
- B. 2+N+1
- C. 2(N+1)
- D. N+2
Answer: D
Explanation:
The diagram shows three UPS modules, each 100 kW, connected in parallel to support a 100 kW IT load.
That means:
* One module (100 kW) can support the load (N).
* Two additional modules are installed as redundancy.
This equals N+2 redundancy.
* 2+N+1 and 2(N+1) imply dual active paths not shown.
* N+N+N is not an industry term.
Thus, the correct redundancy level is N+2.
References: ANSI/TIA-942-B §6.2 (UPS Redundancy Models), IEC 62040-3.
NEW QUESTION # 39
What is the main disadvantage of using a ToR (Top of Rack) design?
- A. A single ToR (Top of Rack) switch is more expensive than an EoR (End of Row) switch.
- B. There will be more switches to manage.
- C. A ToR (Top of Rack) switch has only optical interfaces.
- D. You need a separate rack to install all your ToR (Top of Rack) switches.
Answer: B
Explanation:
A Top of Rack (ToR) design typically requires more switches because each rack has its own switch to manage network connections, as opposed to End of Row (EoR) or centralized designs, which consolidate switches. While ToR designs improve cabling efficiency and reduce latency, they also increase the number of switches, thus raising management complexity and potentially increasing capital and operational costs.
Detailed Explanation:
In a ToR setup, each rack's individual switch allows for quick access and streamlined cabling within the rack. However, this setup means more devices to configure, monitor, and maintain, which can increase administrative overhead and network management complexity.
EPI Data Center Specialist References:
EPI documentation notes that ToR designs can improve performance but also lead to increased management needs due to the higher switch count, making them less ideal in environments where simplified network management is prioritized.
NEW QUESTION # 40
What is the calculation for the desired attenuation factor for shielding material?
- A. A = 20 log (M / R)
Where A is Attenuation M is the maximum acceptable value R is the real value measured - B. A = 20 log (R / M)
Where A is Attenuation R is the real value measured M is the maximum acceptable value - 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: 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 # 41
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. Low pressure in the computer room
- B. Floorboards are most likely not fitted correctly
- C. The cleaning crew is not doing their work properly
- D. Every computer room has high dust levels due to constant high-speed air movement
Answer: B
Explanation:
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.
NEW QUESTION # 42
Do you need to consider bullet (ballistic) protection when designing a data center?
- A. No, there is no reason for implementing bullet protection as you cannot predict the type of weapons that might be used
- B. No; bullet protection is not a requirement of ANSI/TIA-942
- C. Yes, bullet protection is a requirement of ANSI/TIA-942 for Rated-3/4 data centers
- D. Yes, but only when the data center is built in an area with a high criminality rate or with a risk of terrorist attacks
Answer: D
Explanation:
ANSI/TIA-942 requires a risk assessment-based approach to physical security; ballistic protection is not mandated but may be justified by threat analysis.
* A is incomplete (it may still be required by risk).
References: ANSI/TIA-942-B §6.4 Physical Security (threat/risk assessment), ISO 31000 (risk management).
NEW QUESTION # 43
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 H#O.
Analyze the situation and indicate what the most likely cause is for this server to crash.
- A. No cause could be determined as the CFM/CMH of the air conditioning equipment is not stated
- B. The raised floor pressure is too low and/or the raised floor tile % opening is not adequate
- C. The exhaust temperature is exceeding the ASHRAE recommended values
- D. Dust inside the server causing issues with convection-based heat transfer
Answer: D
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 # 44
What is the main disadvantage of using a ToR (Top of Rack) design?
- A. A single ToR (Top of Rack) switch is more expensive than an EoR (End of Row) switch.
- B. There will be more switches to manage.
- C. A ToR (Top of Rack) switch has only optical interfaces.
- D. You need a separate rack to install all your ToR (Top of Rack) switches.
Answer: B
Explanation:
A Top of Rack (ToR) design typically requires more switches because each rack has its own switch to manage network connections, as opposed to End of Row (EoR) or centralized designs, which consolidate switches.
While ToR designs improve cabling efficiency and reduce latency, they also increase the number of switches, thus raising management complexity and potentially increasing capital and operational costs.
Detailed Explanation:
In a ToR setup, each rack's individual switch allows for quick access and streamlined cabling within the rack.
However, this setup means more devices to configure, monitor, and maintain, which can increase administrative overhead and network management complexity.
EPI Data Center Specialist References:
EPI documentation notes that ToR designs can improve performance but also lead to increased management needs due to the higher switch count, making them less ideal in environments where simplified network management is prioritized.
NEW QUESTION # 45
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. Feed A
- B. Feed B
- C. Depends on the setting of the UPS, as the UPS can normally be set to either feed
- D. The UPS will not synchronize to any of the feeds but use an internal clock to set the output voltage and frequency
Answer: C
Explanation:
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.
NEW QUESTION # 46
Where should raised-floor installation start?
- A. Point A (entrance corner)
- B. Point B (side wall)
- C. Point D (corner opposite entrance)
- D. Point C (center of the room)
Answer: D
Explanation:
Best practice is to begin raised-floor installation at the center of the room, working outward. This minimizes alignment errors and ensures the tile grid is centered, which is critical for aisle containment and rack alignment.
Starting at the perimeter (A, B, D) causes cutting of tiles along both sides, misalignment with rack rows, and possible airflow inefficiencies. By starting at the center, tiles can be cut symmetrically around the edges, providing better aesthetics, balanced airflow, and structural stability.
Industry guidelines such as CISCA recommend this approach for raised floors in mission-critical spaces.
References: CISCA Raised Access Floor Guidelines, ANSI/TIA-942-B §6.3.
NEW QUESTION # 47
Where should perforated tiles be installed?
- A. As close to AC as possible
- B. Every 5th rack
- C. One tile per rack in front
- D. At the back of racks
Answer: C
Explanation:
Perforated tiles should be located in front of equipment racks, aligned with cold aisles, to deliver supply air directly to server intakes. Best practice is one perforated tile per rack, adjusted based on airflow requirements and rack load.
* Placing tiles at the back (A) disrupts airflow.
* Spacing every 5th rack (B) provides insufficient cooling.
* Placing near AC (D) causes uneven distribution and pressure loss.
Thus, option C is correct.
References: ASHRAE TC 9.9 "Airflow Management," ANSI/TIA-942-B §6.5.
NEW QUESTION # 48
You are allowed to use a calculator for this question. A battery bank is rated at a total capacity of 600 Ah.
Calculate how much charging current the rectifier should be able to supply as charging current.
- A. 30 Amperes
- B. 80 Amperes
- C. 12 Amperes
- D. 60 Amperes
Answer: A
Explanation:
To determine the charging current for a battery bank, a general rule of thumb is that the charging current should be 5% of the total battery capacity. For a battery rated at 600 Ah, this calculation would be:
600 Ah×0.05=30 Amperes600 \, \text{Ah} \times 0.05 = 30 \, \text{Amperes}600Ah×0.05=30Amperes This ensures the battery is charged efficiently without overloading the rectifier or risking battery damage.
Detailed Explanation:
Battery charging current is typically set as a percentage of the battery's capacity to balance effective charging with longevity and safety. A 5% charging rate is standard for lead-acid batteries, which would be 30 Amperes for a 600 Ah battery bank.
EPI Data Center Specialist References:
EPI standards recommend calculating charging currents based on a percentage of the battery capacity to ensure safety and efficiency, aligning with best practices for battery management in data centers.
NEW QUESTION # 49
You are working on the design of a new facility. The electrical riser of the building with high current power is located close to the area where sensitive IT equipment in the computer room will be located.
What should you recommend to reduce the amount of EMF coming from the electrical riser?
- A. Install three-phase power cabling based on three individual core wires
- B. Install bus bar trunking
- C. Install single-phase power cabling
- D. Install three-phase power cabling based on a combined cable (e.g. XLPE etc.)
Answer: D
Explanation:
To reduce Electromagnetic Fields (EMF) emanating from the electrical riser near sensitive IT equipment, three-phase power cabling in a combined cable (such as XLPE) is effective. Combined cabling helps reduce EMF by keeping the conductors tightly packed, which minimizes magnetic fields generated by current flow. Cables like XLPE (cross-linked polyethylene) also offer better insulation, which helps mitigate EMF interference with nearby IT equipment.
Detailed Explanation:
Using a combined three-phase cable reduces EMF because the magnetic fields generated by each phase tend to cancel each other out when in close proximity. This arrangement helps reduce the overall magnetic field strength. In addition, XLPE and similar materials provide good insulation, making them a preferred choice for reducing EMF emissions around sensitive equipment.
EPI Data Center Specialist References:
EPI data center best practices recommend mitigating EMF interference through combined cabling arrangements, especially near areas where sensitive IT equipment is located. Reducing EMF is crucial to maintaining equipment reliability and ensuring compliance with safety standards.
NEW QUESTION # 50
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. No cause could be determined as the CFM/CMH of the air conditioning equipment is not stated
- B. The raised floor pressure is too low and/or the raised floor tile % opening is not adequate
- C. The exhaust temperature is exceeding the ASHRAE recommended values
- D. Dust inside the server causing issues with convection-based heat transfer
Answer: D
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 # 51
Should aerosol cleaning solutions be used in the computer room?
- A. No, it will contaminate the room
- B. No, unless leak detection installed
- C. Yes, if not connected to power
- D. Yes, only if room smells bad
Answer: A
Explanation:
Aerosol sprays release particulates and residues into the environment, which can contaminate sensitive ICT equipment. Such contamination accelerates corrosion, interferes with airflow, and increases particulate levels beyond ASHRAE recommended limits.
Proper cleaning should use HEPA-filtered vacuum systems or dry wipes, not aerosols. Even odor control aerosols are disallowed in critical rooms.
Therefore, aerosol cleaning solutions must never be used.
References: ASHRAE TC 9.9 "Contamination Guidelines," NFPA 75 §8.4.
NEW QUESTION # 52
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