Which term describes the instrument indication corrected to reflect standard value for accuracy?

• A. Biplanes
• B. Block altitude
• C. Calibrated
• D. Cabin altitude

Answer: (C)

Calibration is the process of adjusting an instrument’s readings so they match a known standard value, ensuring the indication reflects accuracy. When an instrument is calibrated, any systematic errors are corrected, so pilots can rely on the displayed value as representative of the true quantity under standard conditions. In aviation, calibration might involve setting instruments to standard pressure or temperature references so that readings like altitude or airspeed line up with established references. The term that describes an instrument indication corrected to reflect standard value for accuracy is calibrated. The other terms refer to different concepts: block altitude denotes a defined altitude range, cabin altitude relates to the pressurized cabin pressure, and biplanes are a type of aircraft.