Top 10 Calibration Engineer Interview Questions & Answers

1. What is calibration?

Answer:
Calibration is comparing a measuring instrument with a known standard to check and correct its accuracy.

2. Why is calibration important?

Answer:
Because wrong measurements can cause parts to be rejected, customer complaints, failed audits, and wasted money.

3. What is traceability in calibration?

Answer:
It means your measurement results can be traced back to national or international standards without breaks.

4. What is a calibration interval?

Answer:
It’s the fixed time period after which an instrument must be recalibrated to stay accurate.

5. What happens if an instrument is out of calibration?

Answer:
Stop using it. Find which products were affected. Tell the quality team. Recalibrate or replace the instrument.

6. Difference between calibration and verification?

Answer:

• Calibration: Finds error and adjusts the instrument

• Verification: Only checks if it meets limits (pass/fail)

7. What is measurement uncertainty?

Answer:
It’s the possible doubt or error range in a measurement result.

8. What standards are used in calibration labs?

Answer:
Most labs follow ISO/IEC 17025 for quality and technical competence.

9. What records are maintained in calibration?

Answer:
Calibration certificates, traceability records, interval history, and out-of-tolerance reports.

10. What instruments have you calibrated?

Answer (example):
Vernier calipers, micrometers, pressure gauges, dial indicators, torque wrenches, and temperature sensors.