Field instrumentation interview Questions and answer

7 minutes of reading

What are the different process variables? Flow. Pressure. Temperature. Level. Quality i.e. % O2, CO2, pH etc Flow, pressure, temperature is the basic three variables. Define all the process Variable and state their unit of measurement Flow: It is defined as volume per unit of time at specified temperature and pressure Conditions, is generally measured by positive-displacement …

Field instrumentation interview Questions and answer Read More »

Loop checking & Procedure

4 minutes of reading

What is Loop checking: Loop checking is the final process before the commissioning of the processing system. Loop checking is the process that confirms the components wired correctly and also helps to ensure that the system is functioning as designed. The loop checking checks the connection between each component in the control loop. A control …

Loop checking & Procedure Read More »

Stepper motor drive

2 minutes of reading

A stepper motor is a small powered motor designed for tracking and positioning. The electromechanical actuator converts digital inputs into analog motion through the controller electronics. The normal stepper has accuracy 3-5% of step value without error accumulation. Most step motors are used in an open-ended system configuration, which can result in oscillations.   As …

Stepper motor drive Read More »

Hydraulic System Basics

5 minutes of reading

What is a Hydraulic system basically? The basic principle of a hydraulic system is derived from Pascal’s law, basically stating in a closed vessel that there are several holes in the same end so it will be emitted in all directions with the same pressure and flow amount. Where the pressure in a static fluid …

Hydraulic System Basics Read More »

What is DDL (Device Description Language)?

2 minutes of reading

What is DDL? DDL HART equipment description language extends mutual operation (interoperability) exceeds the Universal commands and Common Practice commands. A slave equipment manufacturer uses DDL to create one software file with all relevant equipment characteristics, so a DDL-capable host can communicate fully with the equipment An equipment description (Device Description DD) for a HART …

What is DDL (Device Description Language)? Read More »

What are Optoisolators?

2 minutes of reading

Optoisolators are a component that is used as a component of I / O control for equipment that operates with DC or AC voltage. An optocoupler consists of GaAs LEDs and NPN phototransistor made of silicon.   In Figure a. optoisolator gets a TTL input in the form of a box signal so that the output …

What are Optoisolators? Read More »

What is Automated process system?

5 minutes of reading

The automated system (Automation System AS) is a PC computer-based workstation device and microcomputer control modules with distributed processing capability (distributed processing capability) and allows the addition of input/output functions and the development of control/processing functions. Components of automated system: The automatic system includes the following components: Operation Workstation  Consists of Workstation Operators computers for …

What is Automated process system? Read More »

Scroll to Top