312-40 practice question 19 of 25

Rachel McAdams works as a senior cloud security engineer in a cloud service provider company. Owing to the robust services and security features…

Rachel McAdams works as a senior cloud security engineer in a cloud service provider company. Owing to the robust services and security features provided by her organization, the number of cloud consumers continues to increase. To mee the increasing cloud consumer requirements, her organization decided to build more data centers. Therefore, Rachel's organization formed a new team to design and construct data centers. Rachel is also part of the team and was given the responsibility of designing the data center. How can Racheal maintain a stable temperature in the HVAC unit?

Answer options

A: Rachel can design HVAC such that the heat generated by the data center equipment is taken outside and cool air to supply the equipment is taken inside Correct answer

B: Rachel can design HVAC such that the cool air and heat generated by data center equipment should remain outside to stabilize the temperature

C: Rachel can design HVAC such that the cool air and heat generated by data center equipment should remain inside to stabilize the temperature

D: Rachel can design HVAC such that the heat generated by the data center equipment is taken inside and cool air to supply the equipment is taken outside

Correct Answer:

A. Rachel can design HVAC such that the heat generated by the data center equipment is taken outside and cool air to supply the equipment is taken inside

Explanation

The fundamental principle of data center cooling via an HVAC (Heating, Ventilation, and Air Conditioning) system is heat exchange. IT equipment generates a significant amount of heat, which must be removed from the data center to prevent overheating and ensure stable operating temperatures. The HVAC system accomplishes this by exhausting the hot air generated by the equipment to the outside (or a heat exchange unit) and supplying cooled, conditioned air back into the data center to be drawn in by the equipment. This continuous cycle maintains the required temperature and humidity levels for optimal hardware performance and longevity.

Why Incorrect

B. Keeping both cool air and heat outside would fail to cool the equipment inside the data center.
C. Keeping both cool air and heat inside would cause a rapid and dangerous rise in temperature, leading to equipment failure.
D. Taking heat inside and pushing cool air outside is the exact opposite of the required process for cooling a facility.

References

1. U.S. Department of Energy. (n.d.). Data Center Cooling. Federal Energy Management Program (FEMP). Retrieved from https://www.energy.gov/femp/data-center-cooling (See the "Air Management" and "Cooling Systems" sections which describe the process of removing heat and supplying cool air).

2. Lawrence Berkeley National Laboratory. (2016). Data Center Air Management Basics. Center of Expertise for Energy Efficiency in Data Centers. Retrieved from https://datacenters.lbl.gov/resources/data-center-air-management-basics (See "The Basics of Data Center Cooling" which explains separating hot and cold air streams).

Keep practicing

Take the free 312-40 practice test

Ten exam-style questions with answers and explanations, plus the exam facts and study guides.

Start the free practice test