Finesco International Instrumentation Technician Interview Questions, Process, and Tips

Control valve calibration involves adjusting the valve to ensure it operates correctly and accurately.

• Determine the valve's range and characteristics

• Connect the valve to a calibration device

• Adjust the valve's position to match the desired output

• Verify the valve's accuracy and repeatability

• Document the calibration process and results

The number of parts in an actuator varies depending on the type and model.

• Actuators can have as few as two parts or as many as several dozen.

• Common parts include a motor, gears, a control board, and a housing.

• Additional parts may include sensors, limit switches, and feedback mechanisms.

• The number of parts can also vary depending on the application and specific requirements.

PLC stands for Programmable Logic Controller and DCS stands for Distributed Control System.

• PLC is a digital computer used for automation of electromechanical processes.

• DCS is a control system used to control and monitor industrial processes.

• PLC is used in discrete manufacturing industries while DCS is used in continuous process industries.

• PLC is programmed using ladder logic while DCS is programmed using function block...read more

An instrumentation technician is responsible for installing, maintaining, and repairing various instruments and control systems.

• Installing, calibrating, and troubleshooting instruments and control systems

• Performing routine maintenance and repairs on instruments and control systems

• Testing and inspecting instruments and control systems to ensure proper functioning

• Reading and interpreting technical manuals and diagrams

• Col...read more

To calibrate an interface level transmitter, follow these steps:

• Verify the transmitter is installed correctly and the process is stable

• Determine the calibration range and select appropriate calibration fluids

• Fill the vessel with the calibration fluid and record the transmitter output

• Adjust the transmitter to match the expected output for each calibration point

• Repeat the process for multiple calibration points to ensure...read more

There are several types of drawings used in instrumentation.

• Piping and Instrumentation Diagrams (P&IDs)

• Electrical Schematics

• Loop Diagrams

• Wiring Diagrams

• Process Flow Diagrams (PFDs)

• Isometric Drawings

There are several types of pressure gauges including Bourdon tube, diaphragm, capsule, and bellows gauges.

• Bourdon tube gauges are the most common and measure pressure through the movement of a curved tube.

• Diaphragm gauges use a flexible membrane to measure pressure.

• Capsule gauges use two diaphragms welded together to measure pressure.

• Bellows gauges use a series of convolutions to measure pressure.

• Other types of pressur...read more

Pressure units describe the measurement of force per unit area exerted by a fluid or gas.

• Pressure units are used to measure the force exerted by fluids or gases on a surface.

• Common pressure units include psi, bar, pascal, and torr.

• Pressure can be measured using instruments such as pressure gauges and transducers.

• Pressure units are important in many industries, including manufacturing, aerospace, and healthcare.

Archimedes principle states that the buoyant force on an object is equal to the weight of the fluid displaced by the object.

• Buoyant force is the upward force exerted on an object submerged in a fluid.

• The weight of the fluid displaced by the object is equal to the buoyant force.

• Archimedes principle is used to explain why objects float or sink in fluids.

• Example: A ship floats on water because the weight of the water it d

A booster relay is an electrical device used to amplify or boost a signal.

• It is commonly used in control circuits to increase the strength of a signal

• It can be used to control high voltage or high current devices

• Examples include motor starters, solenoid valves, and lighting circuits

RTD stands for Resistance Temperature Detector and thermocouple is a temperature sensor made of two different metals.

• RTD measures temperature by detecting changes in electrical resistance of a metal wire as temperature changes.

• Thermocouple measures temperature by detecting changes in voltage as temperature changes.

• RTD is more accurate and stable than thermocouple.

• Thermocouple is cheaper and can measure a wider range of...read more

To check zero dp type transmitters, follow these steps:

• Isolate the transmitter from the process

• Ensure the transmitter is at atmospheric pressure

• Verify that the output signal is reading zero

• Adjust the zero if necessary

• Reconnect the transmitter to the process and verify the output signal

The PLCs used in our plant are Siemens S7-300 and Allen Bradley ControlLogix. The DCS is Honeywell Experion.

• Siemens S7-300 and Allen Bradley ControlLogix are the PLCs used in our plant

• Honeywell Experion is the DCS used in our plant