Free ISA-IEC ISA-CAP Exam Questions

Become ISA-IEC Certified with updated ISA-CAP exam questions and correct answers

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Total 557 Questions | Updated On: Apr 21, 2026

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Question 1

What is the next best course of action after troubleshooting a system failure by replacing a suspected bad component with a known good component and finding that this does not correct the problem?

A : Replace another component that is related to the problem and test again

B : Consult a third person who has advanced knowledge about the system or the principles

C : Remove devices one at a time and test again

D : Insert faults into the system and observe the response

Answer: A

Question 2

What sensor malfunction that causes values for a particular variable to be grossly out of range describes which process data?

A : Outliers

B : Noise

C : Drift

D : Bias

Answer: A

Question 3

What is the main advantage of using cascade control over a single-loop control system?

A : ascade control can handle multiple disturbances and setpoints simultaneously

B : Cascade control can improve the stability and performance of the primary process variable

C : Cascade control can reduce the complexity and cost of the control system

D : Cascade control can eliminate the need for sensors and actuators in the secondary loop

Answer: A

Question 4

Which of the following is not a valid form of PID algorithm implemented in modern PID controllers?

A : Parallel form

B : Ideal form

C : Series form

D : Hybrid form

Answer: A

Question 5

What is the effect of increasing the derivative gain (KD) of a PID controller?

A : It reduces the rise time and the overshoot, but increases the steady-state error and the settling time

B : It reduces the overshoot and the settling time, but increases the rise time and the steady-state error

C : It reduces the rise time and the steady-state error, but increases the overshoot and the settling time

D : It reduces the settling time and the overshoot, but increases the rise time and the steady-state error

Answer: A

Page: 1 / 112

Total 557 Questions | Updated On: Apr 21, 2026

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