Free Exin CDCS Exam Questions

Become Exin Certified with updated CDCS exam questions and correct answers

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Total 152 Questions | Updated On: Apr 21, 2026

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Question 1

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 : The cleaning crew is not doing their work properly

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

C : Low pressure in the computer room

D : Floorboards are most likely not fitted correctly

Answer: D

Question 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?

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

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, 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.

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

Answer: D

Question 3

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 high crime 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 in the vicinity of a potential target.

Answer: D

Question 4

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?

A : It does not matter, as the Sensible Heat Ratio has nothing to do with efficiency

B : Not relevant, as Sensible Heat Ratio is only specified for air-conditioner equipment to indicate the ratio between intake temperature and exhaust temperature.

C : Unit A

D : Unit B

Answer: D

Question 5

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

Page: 1 / 31

Total 152 Questions | Updated On: Apr 21, 2026

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