CDCS EXIN EPI Certified Data Centre Specialist Exam Dumps

dumps2024-11-23T10:20:00+08:00

CDCS EXIN EPI Certified Data Centre Specialist exam is easy for you to take now. Learning EXIN CDCS exam information is the first step for you to study. There are 60 multiple choice questions, and you have 90 minutes to finish the test. The required passing score for EXIN CDCS exam is 75%. The available languages are English, Spanish, German, Japanese, Chinese. We provide the latest EXIN EPI Certified Data Centre Specialist CDCS exam dumps, which are valuable in your preparation. Free EXIN EPI Certified Data Centre Specialist CDCS exam dumps are available below.

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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?

UPS efficiency

Inverter efficiency

Load imbalance on the phases

Available battery charging current

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?

It depends on the type of gas-based fire suppression which will be installed.

Yes, as this reduces the amount of piping to be installed in the data center, as all air will go through the air conditioner.

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.

No, it will give a longer reaction time for the smoke detection system and there might also be bypass airflow.

3. 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?

At the back/rear of the server at 50 mm/2 inch

At 1.5 meters/5 feet above the floor in the middle of the cold aisle

At the front/intake of the server at 50 mm/2 inch

At 1.5 meters/5 feet above the floor in the middle of the hot aisle

4. You are installing new copper cabling.

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

Pre-terminated cabling is already factory tested and saves installation time.

There is no advantage as most new copper cabling network designs are based on category 3 or 5E for horizontal cabling.

Pre-terminated cabling has a higher fire rating.

Pre-terminated cabling makes ordering of the copper cables more complex, as you need to know in advance on which side the male or female connector needs to be located.

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

When the dry bulb's temperature is at the lowest allowable temperature for IT equipment as per ASHRAE

When the dry bulb's temperature is at the highest allowable temperature for IT equipment as per ASHRAE

When the relative humidity is at the best practice value for relative humidity, being 50% RH

When the relative humidity is 100%

6. 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?

No, as long as the equipment is less than 700 kg/1,500 lbs it will be within the limits.

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.

Yes, additional floor loading calculations need to be done by the floor manager, which should be verified by the safety engineer.

Yes, a structural engineer, approved/endorsed by the building owner, should carry out new floor loading calculations.

7. 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?

Nothing, as the chiller plant in the building also uses electrical power

You will need to take the value for COP of the chiller plant into consideration

You will need to take a weight factor of 0.4 for district chilled water into consideration

PUE calculations are not possible in shared buildings

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

Protection of ICT equipment against high-frequency noise currents

Protection of human lives

Improvement of the data center grounding/earthing system

Protection against lightning strikes

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

Do employers need to take precautions?

No, anything less than 100 dB (A) is acceptable.

There are no regulations regarding noise levels inside a building. Regulations only apply to noise pollution outside of the building.

As long as the data is compliant to ISO/IEC 27001 it is acceptable.

Yes, since it is mandated by regulations.

10. 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?

The UPS will not synchronize to any of the feeds but use an internal clock to set the output voltage and frequency

Depends on the setting of the UPS, as the UPS can normally be set to either feed

Feed A

Feed B

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

It can only be used in computer rooms which have sufficient air changes per hour.

The gas containers need to be close to the hazard area.

It can only be used in non-continuous occupied areas.

It can only be used in computer rooms where you have sufficient positive pressure.

12. 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)?

No influence as long as the temperature is at approximately 20°C/77°F

Relative humidity has no influence on ESD

ESD levels will go up

ESD levels will go down

13. 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?

Air conditioners perpendicular to (at the end of the row of) the Cold-Aisle

Air conditioners perpendicular to (at the end of the row of) the Hot-Aisle

Air conditioners should always be placed at both sides of each row of racks

Air conditioner placement has no influence on cooling effectiveness and efficiency. Hence, they can be placed at any convenient location.

14. 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?

No, cooling and design of racks have no influence on the fire suppression system design.

Only when the rack height obstructs a potential fire suppression release point.

Yes, the design of the racks has an influence on the fire suppression system design.

Only when the racks might block access to the fire panel.

15. 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?

Do not use fire-rated glass due to the size limit and replace it with normal glass.

Split the window in two equal parts using an aluminum frame.

Split the window into parts smaller than specified as the maximum exposed area and ensure fire-rated frames are used.

Split the window in two equal parts fitted together with transparent silicon glue.

16. 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?

Rated-2 since that is the lowest rating received

Rated-4 since that is the highest rating received

Rated-4 since electrical is more important than mechanical and architectural

Depends on the Rating scored in telecommunications

17. 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?

The cleaning crew is not doing their work properly

Every computer room has high dust levels due to constant high-speed air movement

Low pressure in the computer room

Floorboards are most likely not fitted correctly

18. 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?

Review the cable lengths of each UPS to the common busbar

Nothing, there is no reason for any concern

Review the common mode noise levels within the computer room

Review the harmonics levels within the computer room

CDCS EXIN EPI Certified Data Centre Specialist Exam Dumps

CDCS EXIN EPI Certified Data Centre Specialist Exam Dumps

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