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SK0-004 · Question #35

A server's runtime during power outages is too short to shut down properly. A system technician is asked to remediate the problem. Which of the following would be the result of adding additional…

The correct answer is B. Extended uptime. Adding batteries to a UPS increases the total stored energy capacity, directly extending the amount of time the server can run during a power outage.

Server hardware installation and management

Question

A server's runtime during power outages is too short to shut down properly. A system technician is asked to remediate the problem. Which of the following would be the result of adding additional batteries to the UPS?

Options

  • AIncreased load balancing
  • BExtended uptime
  • CGreater efficiency
  • DIncreased power output

How the community answered

(38 responses)
  • A
    3% (1)
  • B
    89% (34)
  • C
    8% (3)

Why each option

Adding batteries to a UPS increases the total stored energy capacity, directly extending the amount of time the server can run during a power outage.

AIncreased load balancing

Load balancing distributes electrical load across multiple circuits or power supplies and is not affected by adding batteries to a UPS.

BExtended uptimeCorrect

A UPS delivers power from its battery bank when mains power fails - adding batteries increases the amp-hour (Ah) capacity of that bank. With more stored energy available, the UPS can sustain the connected load for a longer duration, giving administrators sufficient time to gracefully shut down servers or for power to be restored.

CGreater efficiency

UPS efficiency relates to power conversion losses in the inverter and rectifier circuits, not the size of the battery bank.

DIncreased power output

The UPS power output capacity (watts) is determined by its inverter rating, not the battery capacity - adding batteries does not increase the maximum wattage the unit can deliver.

Concept tested: UPS battery capacity and runtime extension

Source: https://www.apc.com/us/en/faqs/FA158852/

Topics

#UPS#battery capacity#power management#runtime extension

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