Preview Questions Instrumentation Engineer | Role Specific Skill

Question 1: In programming a PLC for controlling an emergency shutdown system (ESD) in a chemical plant, which of the following is most critical?

Which action should you take?

Choose only one option

Simplifying the control logic to reduce programming complexity

Maximizing control over non-critical processes

Reducing the scan time for faster decision-making

Ensuring fail-safe operations and ensuring critical processes are stopped immediately

Question 2: During the calibration of an RTD (Resistance Temperature Detector), which is the most accurate method to check for sensor drift?

Which action should you take?

Choose only one option

Using a visual comparison with an analog thermometer

Comparing readings with a known fixed point temperature

Checking the sensor at the standard temperature

Using a calibrated digital thermometer

Question 3: What is the main purpose of using structured text in PLC programming for chemical processes?

Which action should you take?

Choose only one option

It is used only for simple on/off control systems

It simplifies wiring and hardware connections in PLC systems

It provides a higher-level, more readable code for complex control processes

It allows for the use of graphical symbols for control programming

Question 4: What is the key feature of a digital pressure sensor that makes it suitable for highly accurate process control?

Which action should you take?

Choose only one option

It uses a remote sensing technique for more accurate readings

It has a wider operating temperature range than analog sensors

It provides a direct readout in digital format without requiring analog conversion

It is more durable than mechanical sensors

Question 5: How does the use of a capacitance level sensor improve the measurement of bulk solid levels in a petrochemical process?

Which action should you take?

Choose only one option

It accurately detects material levels by measuring changes in capacitance between the probe and the material

It reduces calibration requirements and simplifies maintenance

It compensates for high-pressure variations in the system

It simplifies installation by using only one sensor type for multiple materials

Question 6: Why is it essential to periodically perform functional checks and calibration on flowmeters in chemical plants?

Which action should you take?

Choose only one option

To ensure continuous process accuracy and meet regulatory compliance

To extend the operational lifespan of the flowmeters

To reduce the downtime of flowmeters and minimize repair costs

To reduce the complexity of control system integration