Exin CDCS Questions Answers
EXIN EPI Certified Data Centre Specialist- 120 Questions & Answers
- Update Date : November 06, 2025
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Exin CDCS Sample Questions
Question # 1The logical overview of the data center looks as pictured. To what TIA-942 Rating is this design made based on electrical only?
A. Rating - 4
B. Rating - 3
C. Rating - 2
D. Rating - 1
Question # 2
You are allowed to use a calculator for this question. The total power consumption of the ICT equipment in a rack is 6 kW. The equipment is traditional ICT equipment with a Delta-T of approximately 11 °C / 20 °F. Calculate the approximate CFM required to cool the equipment in the rack.
A. Approximately 1,500 CFM
B. Approximately 1,000 CFM
C. Approximately 500 CFM
D. Approximately 160 CFM
Question # 3
What indicates the breaking capacity of a fuse or breaker?
A. Mechanical strength of the casing of a fuse or breaker.
B. The maximum voltage, in case of an electrical surge, that the fuse or breaker can handle withoutbeing destroyed or causing an electric damaging arc.
C. The current at which the device will trip.
D. The current that a fuse or breaker is able to interrupt without being destroyed or causing anelectric damaging arc.
Question # 4
The computer room has high levels of H2S gas contamination. What is the best option to resolve this issue?
A. Vacuum the whole room using a HEPA/S-Class-based filter.
B. Install air-scrubbers.
C. Clean the room and racks with a damp/wet cloth.
D. Provide more air changes per hour by adding more fresh air to the computer room.
Question # 5
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. 12 Amperes
B. 30 Amperes
C. 60 Amperes
D. 80 Amperes
Question # 6
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. The system should not be based on motion detection as the lights might suddenly switch off while
staff is still at work.
C. It is not advisable to use such a system since it will reduce the lifetime of LED lighting.
D. At all times, the levels should allow for security cameras to function properly.
Question # 7
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 correctweight?
A. Approximately 410 kg / 900 lbs
B. Approximately 820 kg / 1,800 lbs
C. Approximately 1,390 kg / 3,000 lbs
D. Approximately 1,640 kg / 3,600 lbs
Question # 8
What should be considered when installing overhead data cabling?
A. To maintain minimum separation from power and ensure that the fire detection and suppressionsystems are not hindered.
B. Copper data cabling should not be placed in metal cable trays.
C. Optical fiber cabling should always be positioned on top of the copper cabling in the same cabletray to avoid damage to the sensitive optical fiber.
D. All cabling should make sharp bends directly into the rack to avoid usage of additional space andblocking the airflow on top of the rack.
Question # 9
You are changing the design of the fire suppression system for your computer room from ahalocarbon fire suppression system into an inert-based fire suppression system. Could you use thesame formula to calculate the gas content for the gas?
A. No, there is a significant difference in the formula for the different types of fire suppression gases.
B. Yes, as long as you take the difference between the net and gross volume into account.
C. Yes, as long as you use the same units of measure, i.e., kg/m³ or lbs/ft³.
D. Yes, as long as you change the 'S' factor of the formula to reflect the gas type used.
Question # 10
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. You need a separate rack to install all your ToR (Top of Rack) switches.
C. There will be more switches to manage.
D. A ToR (Top of Rack) switch has only optical interfaces.
Question # 11
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 coming from two different substations, one power company is not acceptable
B. Two feeds coming from two different substations, one power company is acceptable
C. Two feeds entering the data center building from one substation
D. One feed from one substation split over two separated distribution boards in separate rooms
Question # 12
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. No, as concurrently maintainable only applies to electrical and mechanical (power and cooling).
B. Yes, but only if the network administration does not comply with ANSI/TIA-606.
C. Yes, amongst other aspects, the network architecture should be Rated-3 compliant with therequirements of ANSI/TIA-942.
D. No, only the type of cabling used will be audited.
Question # 13
What is a significant difference between a halocarbon gas-based fire suppression system and an inertgas-based fire suppression system?
A. Inert gas has smaller-sized gas containers than halocarbon gas.
B. Inert gas harms the environment and halocarbon gas does not.
C. Halocarbon gas works on the basis of heat removal and inert gas works on the basis of oxygenreduction.
D. Halocarbon gas works on the basis of oxygen reduction and inert gas works on the basis of heatremoval.
Question # 14
Do you need to consider bullet (ballistics) protection when designing a data center?
A. Bullet (ballistics) protection is required by ANSI/TIA-942 for all data centers.
B. Bullet (ballistics) protection is only required when the data center is located in an area with a highcrime rate.
C. Bullet (ballistics) protection is required by ANSI/TIA-942 for data centers Rated 3.
D. Bullet (ballistics) protection is only required if the facility is a potential target or the building is inthe vicinity of a potential target.
Question # 15
What is a potential disadvantage of using water mist as a fire extinguishing system?
A. It only uses 10% of the water normally used in a water-based fire suppression, which might not beenough to suppress the fire
B. It will rapidly increase the humidity level in the data center, which can cause a potential risk forthe operation of the equipment
C. It extracts oxygen from the air creating a potential risk for humans inside the computer room
D. It has droplets that are too small (100-120 microns) so it can only be used for small fires