How often does a thermometer need to be calibrated?

• A. Daily
• B. Weekly
• C. Monthly
• D. 5 DEG

Answer: (D)

Calibration is about keeping temperature readings trustworthy by checking a thermometer against a known reference and adjusting if needed. How often you do it isn’t fixed for every situation; it depends on how critical the measurements are, how often the instrument is used, the environment it’s in, and what the manufacturer or your ship’s procedures require. In practice, you’ll often perform quick checks or verifications daily to catch obvious drift, and schedule a full calibration at defined intervals (monthly, annually, or per policy) or after events that could affect accuracy, such as repairs, impact, or exposure to extreme conditions. The key idea is to follow the established procedures and calibrate whenever the readings must meet strict tolerances or after any incident that could compromise accuracy. The option listed as a fixed daily/weekly/monthly interval isn’t universally correct; what matters is aligning with documented SOPs and standards.