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Exin Exam CDCS Topic 2 Question 10 Discussion

Actual exam question for Exin's CDCS exam
Question #: 10
Topic #: 2
[All CDCS Questions]

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?

Show Suggested Answer Hide Answer
Suggested Answer: B

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:

600Ah0.05=30Amperes600 , text{Ah} times 0.05 = 30 , text{Amperes}600Ah0.05=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.


Contribute your Thoughts:

Stephaine
3 days ago
Why choose just one when you can have both? Option C seems like the way to go - air conditioners on both sides of each row. Gotta keep those servers cool, am I right?
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Rhea
6 days ago
I'm not so sure about that. Wouldn't it make more sense to have the air conditioners at the end of the cold aisle so the cold air is evenly distributed throughout the racks? Just my two cents.
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Leslee
7 days ago
Option B is clearly the right choice. Placing the air conditioners at the end of the hot aisle ensures that the cold air is directed straight into the racks, maximizing cooling efficiency.
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Ryan
12 days ago
I disagree. I believe air conditioners should be placed at both sides of each row of racks for better cooling distribution.
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Lucia
13 days ago
I agree with Reena. Placing them at the end of the row of the Cold-Aisle would ensure efficient cooling.
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Reena
14 days ago
I think the air conditioners should be perpendicular to the Cold-Aisle.
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