CDCS Dumps V8.02 (2026) for EXIN EPI Certified Data Centre Specialist – Real Exam Prep to Pass First Try

1. When designing a data center network, your company wants to minimize the number of network switches to manage.

What type of physical cabling layout would be the best choice?

2. 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?

3. What is a potential disadvantage of using water mist as a fire extinguishing system?

4. Which formula is correct?

5. A data center has its own power supply from the public utility and receives chilled water supply from the building owner.

What needs to be taken into consideration when calculating the PUE?

6. You need to determine the strategy for the cooling audit. All the servers are based on a front-to-rear (F-R) airflow design.

Which location for the temperature/humidity measurement should you recommend for the audit?

7. When shielding material reaches its saturation point, what will be the impact?

8. 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?

9. The 'maximum exposed area' of the fire-rated glass is defined by the supplier as 3 sqm/32 sqft. The window area is 4 sqm/43 sqft.

What would be the best option?

10. 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?

11. The electrical diagram of the data center shows the following UPS configuration and has a load of 80 kW.

What is the set-up in this data center?

12. You are installing new copper cabling.

What is the advantage or disadvantage of choosing pre-terminated category 6 or 6A cabling?

13. 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?

14. What should you consider when using raised floor tiles with air deflectors or louvers?

15. When installing a raised floor, can we use a spirit level bar to level the floor?

16. 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?

17. The noise levels in the data center are approximately 91 dB (A).

Do employers need to take precautions?

18. The location of a data center is just above the Arctic Circle (North Pole). The outside air temperature is never above 21°C/70°F.

Taking energy efficiency as the highest priority, which cooling system should you recommend?

19. 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 ₂ O.

Analyze the situation and indicate what the most likely cause is for this server to crash.

20. A data center is located in an area where the demand for power is higher than the utility power company is able to deliver. This results in frequent power outages and, therefore, power shedding (scheduled/controlled power shutdown for areas) is frequently applied. The mains power is more than 650 hours/year not available.

What type of generators should be installed?

21. In which stage of the data center life cycle does commissioning take place?

22. A data center scores Rated-3 in mechanical, Rated-4 in electrical, and Rated-2 in architectural.

What is the overall Rating of this data center when the Rating is based on the ANSI/TIA-942?

23. 1.Management has requested a 15-minute battery bank assuming full load on the UPS.

The UPS vendor has provided the following specifications of the UPS:

• Rated power: 30 kVA

• Rectifier input voltage: 400 V/3 phase

• Rectifier input power factor: 0.8

• Battery rated voltage: 384 V

• Number of cells: 192

• End of discharge voltage: 308 V

• Inverter output voltage: 400 V/3 phase

• Inverter output power factor: 0.8

What information is missing to perform the battery calculation?

24. What is the advantage or disadvantage of using MPO (Multi-fiber Push On)/pre-terminated fiber?

25. What mainly affects the cooling capacity of a raised floor tile?

26. What is the calculation for the desired attenuation factor for shielding material?

27. Do you need to consider blast protection when designing a data center?

28. What is the main reason to install Earth Leakage protection?

29. An MCB needs to be installed in the PDU of an air-conditioner unit.

Which breaking curve should you select?

30. 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?

31. You are working with a customer who requires a guarantee that THDi levels coming from the UPS should not exceed more than 3% THDi. Furthermore, he wants to run a power-efficient data center. The UPS has a 6-Pulse SCR/Thyristor based rectifier. The current load on the UPS is approximately 80%. The customer indicates they are not expecting any changes on the ICT infrastructure for the next 3 years.

What should you recommend?

32. 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?

33. What is a potential disadvantage of using a hypoxic-based fire suppression system as a fire extinguishing system?

34. 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?

35. What precaution shall be taken for cabling leading into an equipment rack when a data center is in a seismic-prone area?

36. When are the wet bulb and dry bulb temperatures identical?

37. Smoke sensors need to be tested to ensure that they pick up a potential fire in the data center.

What should you recommend?

38. Three data centers are benchmarked on facilities energy efficiency.

Data center A has achieved a PUE of 2.45.

Data center B has achieved a PUE of 1.20.

Data center C has achieved a PUE of 1.90.

Which of the data centers is operating at the highest facility efficiency?

39. Is it allowed to make design changes during the implementation phase?

40. An air-conditioner unit needs to be selected. Two types are available:

Unit-A has a Sensible Heat Ratio (SHR) of 0.7.

Unit-B has a Sensible Heat Ratio (SHR) of 0.9.

From an efficiency point of view, which one should be selected?

41. 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?

42. The temperature in the computer room is being increased from 18°C/64°F to 27°C/81°F.

What is the impact, if any, on the amount of gas required to suppress a fire assuming the gas is a Halocarbon?

43. 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?

44. The air intake of the mission-critical server at the top of the rack is measuring 25 °C/77 °F.

Is this acceptable?

45. The humidity in the computer room has changed from about 50% down to 35% Relative Humidity (RH).

What influence does this have on Electrostatic Discharge (ESD)?