Category: Question and Answers

The Ultimate Control Valve Guide: 200 Questions & Answers

Control Valve Master Q&A Guide A comprehensive resource of 200 questions covering design, manufacturing, testing, installation, troubleshooting, and maintenance of industrial control valves. 1. General & Fundamentals 1. What is a control valve?+ A control valve is a power-operated device used to regulate the flow of a fluid, such as gas, steam, water, or chemical […]

Purdue Model for ICS Cyber Security – Top 30 Question and Answers

Purdue Model for ICS Cyber Security: 30 Interview Questions & Answers Purdue Model for ICS Cyber Security 30 Comprehensive Interview Questions & Answers Part 1: Fundamental Concepts Part 2: Security Principles & Implementation Part 3: Advanced & Scenario-Based Questions © 2025 Instrunexus. All Rights Reserved.

Top 50 Advanced DCS Interview Questions and Answers for 2025

DCS Architecture & Fundamentals   Q: What is the fundamental difference between a DCS and a PLC? A: The core difference is architectural. A PLC (Programmable Logic Controller) is a centralized, standalone controller optimized for high-speed discrete logic and machine control. A DCS (Distributed Control System) is a process-oriented system with control distributed across multiple […]

Troubleshooting Pressure Instruments – Top 25 Interview Q&A

1. What are the common issues observed in pressure transmitters? Zero drift Span shift Signal loss Plugged impulse lines Electrical noise or grounding issues 2. How do you identify zero drift in a pressure transmitter? Zero drift occurs when the transmitter shows a non-zero reading at no pressure. It’s detected by isolating the transmitter and […]

Using Pressure Instruments in Hazardous Areas – Top 25 interview questions Q&A

✅ Using Pressure Instruments in Hazardous Areas – Top 25 Interview Questions & Answers 1. What is a hazardous area? A hazardous area is a location where flammable gases, vapors, or dusts are present in sufficient quantities to pose a risk of explosion or fire. 2. Which international standards govern the use of instruments in […]

NAMUR NE43 Current Fault Detection – Pressure Top 20 Interview Q&A

NAMUR NE43 is an important standard in the process industry that defines specific current ranges for fault detection in analog 4–20 mA loops. This Q&A guide will help instrumentation engineers understand how pressure transmitters and control systems handle faults reliably. Top 20 Interview Questions and Answers What is NAMUR NE43? NAMUR NE43 is a guideline […]

What is Live Zero in Pressure Transmitters? – Top 15 Interview Q&A

🌟 What is Live Zero in Pressure Transmitters? – Top 15 Interview Q&A Understanding Live Zero is crucial for instrumentation professionals. In interviews, questions around live zero, signal transmission, fault detection, and transmitter calibration often surface. Below are the top 15 Q&A that will help you master this concept and boost your confidence in technical […]

Differential Pressure in Filters and Strainers – Top 15 interview Q&A

Differential Pressure in Filters and Strainers: Your Top 15 Interview Questions Answered For anyone working in industrial processing, manufacturing, or maintenance, a thorough understanding of filtration and the role of differential pressure is paramount. When interviewing for a role in these sectors, you can expect to be quizzed on your knowledge of filters, strainers, and […]

Pressure Drop Calculation Across Instruments – Top 10 Interview Q&A

Pressure Drop Calculation Across Instruments: Ace Your Interview with These Top 10 Q&As In the world of process control and instrumentation, a thorough understanding of pressure drop is paramount for ensuring the efficiency, safety, and reliability of any system. For engineers and technicians, the ability to accurately calculate and interpret pressure drop across various instruments […]