L&T Energy Hydrocarbon Electrical & Instrumentation Engineer Interview Questions and Answers

Calibration procedure involves comparing the measurement device with a known standard to ensure accuracy.

• Select a known standard with a higher accuracy than the device being calibrated

• Perform measurements on the standard and record the readings

• Compare the readings with the device being calibrated

• Adjust the device if necessary to match the standard

• Repeat the process until the readings match within an acceptable range

Hazardous zones are classified based on the likelihood of explosive gas or dust. Protection techniques include explosion-proof equipment and ventilation.

• Hazardous zones are classified into Zone 0, Zone 1, and Zone 2 based on the likelihood of explosive gas or dust.

• Zone 0 is where explosive gas or dust is present continuously or for long periods of time.

• Zone 1 is where explosive gas or dust is likely to occur during nor...read more