Dalmia Bharat Cement Instrumentation Technician Interview Questions and Answers

Control valve positioner is a device used to control the position of a control valve based on the input signal.

• Control valve positioner ensures accurate control of the valve position.

• It receives a control signal from the controller and adjusts the valve position accordingly.

• The positioner compares the valve position with the desired position and sends a pneumatic signal to the actuator to adjust the valve accordingly.

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Thermocouple types and ranges

• Thermocouples are temperature sensors that use the principle of thermoelectric effect

• Common thermocouple types include K, J, T, E, and N

• Each thermocouple type has a specific temperature range it can measure

• For example, type K thermocouples can measure temperatures from -200°C to +1350°C

• Type J thermocouples can measure temperatures from -40°C to +750°C

• Thermocouple ranges can vary depending o