Sanghi Industries Instrument Engineer Interview Questions and Answers

Various types of sensors are used in plants for monitoring and control purposes.

• Temperature sensors (thermocouples, RTDs, thermistors)

• Pressure sensors (piezoelectric, capacitive, strain gauge)

• Level sensors (ultrasonic, radar, capacitance)

• Flow sensors (magnetic, vortex, ultrasonic)

• Gas sensors (infrared, electrochemical, catalytic)

• Humidity sensors (capacitive, resistive, thermal)

• pH sensors (glass, ISFET, differential)

• Con...read more

Mass flow meter measures the mass flow rate of a fluid in a pipe or duct.

• Works on the principle of Coriolis effect or thermal dispersion

• Fluid flows through a vibrating tube or a heated element

• Measures the change in frequency or temperature to determine mass flow rate

• Used in industries like chemical, food and beverage, and oil and gas

• Examples include Coriolis mass flow meter and thermal mass flow meter

Load cell troubleshooting involves checking wiring, calibration, and environmental factors.

• Check wiring connections for any loose or damaged wires

• Verify calibration using a known weight or standard calibration weight

• Ensure the load cell is not exposed to extreme temperatures or vibrations

• Inspect the load cell for any physical damage or wear

• Check the amplifier or signal conditioner for any issues

• Consider environmental f...read more

PLCs are programmable logic controllers used in automation. Types include modular, compact, and rack-mounted PLCs.

• Modular PLCs are flexible and can be customized to fit specific needs.

• Compact PLCs are smaller and more cost-effective, but have limited I/O options.

• Rack-mounted PLCs are designed for larger systems and have high I/O capacity.

• Some popular PLC brands include Siemens, Allen-Bradley, and Mitsubishi.

• PLCs can al...read more