Question

caliper measurement: measuring devices must be ______ at regular intervals to maintain their accuracy. aligned calibrated tested used

Explanation:

Calibration is the process of comparing a measuring device's readings with a known standard to ensure accuracy. Measuring devices like calipers need regular calibration. Alignment (adjusting for proper position) and testing (checking functionality) are not the key terms for maintaining accuracy in the context of measurement standards. Using the device doesn't inherently maintain its accuracy.

Answer:

Calibrated