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Data Center Operations and Maintenance Flashcards

7 cards from real CDCP practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Data Center Operations and Maintenance flashcards as text

  1. During a preventive maintenance window, a UPS battery string fails a capacity test at 78% of rated capacity. What is the recommended action?

    Answer: Replace the entire battery string immediately

    A battery string failing below 80% of rated capacity is the standard threshold for immediate replacement to ensure reliable backup power.

  2. Which metric is most critical when evaluating the efficiency of a data center cooling system?

    Answer: Cooling system COP (Coefficient of Performance)

    COP measures the ratio of cooling output to energy input, directly reflecting cooling system efficiency.

  3. A data center operations team is implementing a change to add a new PDU. Which document must be updated FIRST before energizing the new PDU?

    Answer: Single-line electrical diagram

    The single-line electrical diagram must be updated first as it is the authoritative reference for safe electrical work and lockout/tagout procedures.

  4. What is the purpose of a 'hot aisle containment' strategy in data center operations?

    Answer: Prevent mixing of cold supply air with hot exhaust air

    Hot aisle containment captures server exhaust air directly and routes it to cooling units, preventing recirculation and improving cooling efficiency.

  5. A facility manager notices the PUE has risen from 1.45 to 1.68 over three months. What is the MOST likely cause to investigate first?

    Answer: Cooling system inefficiency or failure

    A rising PUE with stable IT load typically indicates cooling overhead has increased, pointing to cooling system degradation or misconfiguration.

  6. Which practice BEST supports 'lights-out' or remote operations in a data center?

    Answer: Deploying DCIM with remote monitoring and alerting

    DCIM (Data Center Infrastructure Management) provides real-time visibility, alerting, and remote control capabilities essential for lights-out operations.

  7. During a fire suppression system inspection, the clean agent cylinder weight is found to be 5% below the minimum fill level. What action should be taken?

    Answer: Refill the cylinder to full capacity before returning to service

    A cylinder below minimum fill level must be recharged before returning to service to ensure the system can deliver the required agent concentration.