Explain the importance of maintenance discipline for sensor reliability.

• A. Ignoring faults until failure.
• B. Regular calibration, fault isolation, and component replacement.
• C. Replacing sensors only after 20 years.
• D. Calibrating annually only.

Answer: (B)

The main concept is that sensor reliability comes from disciplined maintenance actions that keep readings accurate and components functioning. Regular calibration counteracts drift and aging so sensor outputs reflect real conditions, even after exposure to temperature changes, vibration, and environmental stress. Fault isolation lets technicians quickly determine whether a problem lies in the sensor itself, its wiring, power supply, or the processing chain, enabling targeted fixes before issues propagate. Replacing worn or degraded parts prevents unexpected outages and reduces the chance of cascading failures across the sensor network. Together, these maintenance practices keep accuracy high, system availability strong, and decision quality reliable for air defense operations.

Ignoring faults until failure invites sudden loss of sensing capability and unreliable alarms. Replacing sensors only after an extreme age ignores aging and drift. Calibrating annually only may be too infrequent for critical sensors in harsh environments, where more frequent or condition-based calibration is warranted.