Preview Questions Control Systems Engineer | Role Specific Skill

Question 1: What impact does increasing the integral time (I) have on the control performance of a PID controller?

Which action should you take?

Choose only one option

It has no impact on system performance

It increases the overshoot without affecting steady-state error

It reduces steady-state error by correcting accumulated error

It makes the system more responsive to changes

Question 2: What is the most effective method for compensating for process dead time in a PID-controlled system?

Which action should you take?

Choose only one option

Apply only derivative control to manage the dead time

Ignore the dead time and continue with traditional PID tuning

Rely on high proportional gains

Use a combination of feedforward control and model-based predictive control to manage the dead time

Question 3: When developing a control algorithm for a distillation column, how do you minimize disturbances from feed composition variations?

Which action should you take?

Choose only one option

By incorporating feedforward control to anticipate disturbances and adjust control actions

By simplifying the control system and reducing its complexity

By using only feedback control to respond to deviations after they occur

By setting static control parameters and ignoring variations in feed composition

Question 4: How do you address noise amplification when using derivative action in a PID controller for a chemical pump system?

Which action should you take?

Choose only one option

Use only proportional and integral actions without derivative control

Add filtering to the derivative action to reduce the amplification of noise

Ignore the noise and focus on maintaining the setpoint

Increase the derivative gain to stabilize the system

Question 5: How does an Automatic Control System (ACS) help optimize energy consumption in a petrochemical plant?

Which action should you take?

Choose only one option

By switching off machinery at predetermined intervals without considering process conditions

By reducing the frequency of control adjustments to minimize energy use

By operating equipment at constant speeds regardless of process conditions

By adjusting setpoints dynamically based on real-time data and energy consumption metrics

Question 6: What is the advantage of using a distributed control system (DCS) alongside SCADA in a chemical plant?

Which action should you take?

Choose only one option

DCS is used only for financial management

DCS and SCADA are redundant, offering no clear advantage

DCS handles real-time control of processes, while SCADA manages data acquisition and visualization

DCS replaces SCADA entirely for faster processing