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 29, 2026

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Question 1

Which of the following control valves is most suitable for handling a low pressure drop in a pipe over two inches in diameter?

A : all valve

B : Globe valve

C : Diaphragm valve

D : Butterfly valve

Answer: A

Question 2

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 3

What is the main benefit of embedding Honeywell’s Smart Distributed System (SDS) in sensors and actuators?

A : It enables the sensors and actuators to communicate with each other and with higher-level devices using a simple and reliable protocol.

B : It enables the sensors and actuators to operate at higher speeds and lower voltages using a single communication line and power supply.

C : It enables the sensors and actuators to embed configuration, diagnostic, and process information in a very small footprint and cost-effectively.

D : All of the above.

Answer: A

Question 4

Integral action is a controller action that adjusts the output of a controller based on the accumulated error over time. Integral action eliminates offset by continuously shifting the proportional band until the error is zero. Integral action operates on the:

A : urrent error

B : Rate of change of error

C : Sum of past errors

D : Difference between setpoint and process variable

Answer: A

Question 5

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

Page: 1 / 112

Total 557 Questions | Updated On: Apr 29, 2026

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