VARECS shall be tested how often for accuracy and freedom of movement?

VARECS shall be tested how often for accuracy and freedom of movement?

• A. Every year
• B. Every month
• C. Every two years
• D. Every three years

Answer: (A)

Testing VARECS for accuracy and freedom of movement on an annual basis ensures the system reliably positions valves and travels through their full range. Accuracy means the shown position matches the actual valve position, while freedom of movement means the actuator and linkage can move from fully open to fully closed without binding or interference. Over time, wear, corrosion, lubrication changes, or debris can cause drift or sticking, so a yearly check catches these issues before they affect response in an emergency. More frequent checks would be unnecessary for this purpose, and longer intervals risk undetected deviations that could compromise safety.

Testing VARECS for accuracy and freedom of movement on an annual basis ensures the system reliably positions valves and travels through their full range. Accuracy means the shown position matches the actual valve position, while freedom of movement means the actuator and linkage can move from fully open to fully closed without binding or interference. Over time, wear, corrosion, lubrication changes, or debris can cause drift or sticking, so a yearly check catches these issues before they affect response in an emergency. More frequent checks would be unnecessary for this purpose, and longer intervals risk undetected deviations that could compromise safety.