Instrument Foreman Interview Questions and Answers

A drawing is a visual representation of an object or system, while loop checking is a process of verifying the functionality of control loops.

• A drawing is a graphical representation of an object, system, or process, often created using computer-aided design (CAD) software.

• Drawings provide detailed information about the dimensions, components, and connections of the object or system.

• Loop checking is a procedure performed during the commissioning phase of a control system to en...read more

Weighing systems principles involve accuracy, precision, calibration, and environmental factors.

• Accuracy: Ensuring the measured weight is close to the true value.

• Precision: Consistency in obtaining the same weight measurement repeatedly.

• Calibration: Regularly adjusting the weighing system to maintain accuracy.

• Environmental factors: Considering conditions like temperature and humidity that can affect weighing results.

The PLC languages used in our plant include ladder logic, function block diagram, and structured text.

• Ladder logic is commonly used for simple logic operations

• Function block diagram is used for more complex functions and calculations

• Structured text is used for advanced programming and customization

Thermocouples are used to measure temperature in various industrial applications.

• Used in temperature measurement in industries like petrochemical, power generation, food processing, etc.

• Can withstand high temperatures and harsh environments.

• Provide fast response times and accurate readings.

• Common types include K, J, T, and E thermocouples.

• Examples: monitoring temperature in a furnace, controlling temperature in a chemical reactor.

Calibration is the process of adjusting or checking the accuracy of a measuring instrument by comparing it to a known standard.

• Calibration ensures that the instrument provides accurate and reliable measurements.

• It involves adjusting the instrument to match the standard or known value.

• Calibration is important for maintaining quality control and ensuring consistency in measurements.

• Examples of calibrated instruments include thermometers, pressure gauges, and scales.

PM stands for Preventive Maintenance and CM stands for Corrective Maintenance in the field of instrumentation.

• PM involves scheduled inspections, repairs, and replacements to prevent equipment failure.

• CM involves fixing equipment after it has already failed to restore it to working condition.

• PM is proactive maintenance while CM is reactive maintenance.

• Example: Changing filters regularly (PM) vs. replacing a broken sensor (CM).