Preview Questions Instrumentation Engineer | Role Specific Skill

Question 1: How can a PLC program ensure reliable start-up and shutdown procedures in a chemical process?

Which action should you take?

Choose only one option

By ignoring sensors and starting the system automatically

By reducing all control actions to their lowest levels during start-up

By implementing time delays and interlocks for safe process initiation and cessation

By using manual control to start and stop the process

Question 2: What is the primary advantage of using optical level sensors in chemical plants?

Which action should you take?

Choose only one option

They require less maintenance but are limited to high-viscosity liquids

They are easy to install but only work for measuring solids

They are cost-effective but less accurate than capacitive sensors

They provide non-contact measurement with high accuracy, ideal for aggressive or hazardous chemicals

Question 3: What is the effect of process disturbances on a traditional PID-controlled system, and how can they be mitigated?

Which action should you take?

Choose only one option

Disturbances do not affect PID-controlled systems, and no mitigation is required

Disturbances are mitigated by simply increasing controller gain

Disturbances increase the accuracy of the PID controller

Disturbances can destabilize the system; mitigation is achieved with feedforward control

Question 4: What is the purpose of using PID control blocks in PLC programming in chemical processing?

Which action should you take?

Choose only one option

To reduce the complexity of the PLC program by using simple control strategies

To limit the system response to basic on/off control logic

To regulate control loops by adjusting proportional, integral, and derivative actions to minimize error

To simplify control by eliminating the need for feedback loops

Question 5: In a control systems design for chemical processes, what is the function of a real-time data historian?

Which action should you take?

Choose only one option

To replace manual data entry by operators

To store and analyze historical process data for performance optimization

To automatically adjust setpoints based on historical data

To process control actions in real-time without storing data

Question 6: How does control system redundancy improve safety and reliability in chemical plants?

Which action should you take?

Choose only one option

It reduces the cost of the system by using fewer components

It limits operator control in case of system failures

It increases the complexity of control systems, making them less reliable

It ensures that a backup system is available in case of primary system failure