Question 78 of 144
SK0-005 server-hardware-installation-management Practice Question
A technician is installing a new 2U server into a datacenter rack. The server is equipped with redundant power supplies. According to best practices for power redundancy, how should the technician connect the power supplies?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Connect each PSU to a separate circuit
Option B is correct because connecting each power supply to a separate circuit (or separate PDUs fed by different circuits) ensures that if one circuit fails, the other keeps the server powered. Option A is wrong because connecting both to the same PDU creates a single point of failure. Option C is wrong because while a UPS is important, connecting only one PSU to a UPS defeats redundancy if the non-UPS circuit fails. Option D is wrong because operating voltages are standardized and must match the server specifications.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Connect one PSU to a UPS and the other directly to mains
Why it's wrong here
This defeats redundancy because a failure of the mains circuit would still shut down the server if the other PSU fails.
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Run one PSU at 110V and the other at 220V for load balancing
Why it's wrong here
Power supplies are designed to operate at a specific voltage range; mixing voltages can damage equipment and is not a practice for redundancy.
- ✓
Connect each PSU to a separate circuit
Why this is correct
Best practice is to connect redundant PSUs to independent power sources (separate PDUs on different circuit breakers) to eliminate single points of failure.
- ✗
Connect both PSUs to the same power distribution unit (PDU)
Why it's wrong here
Both PSUs on the same PDU create a single point of failure; if the PDU or its circuit fails, the server loses all power.
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Last reviewed: Jul 26, 2026
This SK0-005 practice question is part of Courseiva's free CompTIA certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the SK0-005 exam.
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