What is the primary action of annual maintenance for equipment?

• A. Inspect keyboard layout
• B. Recalibration
• C. Check battery level
• D. Clean water reservoir

Answer: (B)

Annual maintenance centers on preserving the device’s accuracy and reliability by bringing its measurements back to a known standard. Recalibration corrects drift that accumulates over time in sensors and meters, ensuring outputs stay within the manufacturer’s specifications for safe, effective operation. Routine tasks like checking battery levels or cleaning a reservoir are important, but they don’t directly restore the device’s accuracy over a year the way recalibration does. Inspecting a keyboard layout isn’t a primary maintenance focus for most equipment.