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: Jan 13, 2026

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Question 1

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 2

Which of the following statements is true about gauge pressure?

A : It is measured relative to a perfect vacuum.

B : It is measured relative to the local atmospheric pressure.

C : It is measured relative to the pressure difference between two points.

D : It is measured relative to the pressure in an adjacent vessel.

Answer: A

Question 3

In which of the following situations would on-the-job (OJT) operator training be a better choice than classroom training?

A : When the operator needs to learn how to use a specific tool or equipment in a real or simulated work environment

B : When the operator needs to learn about the theoretical concepts and principles underlying the work process

C : When the operator needs to learn how to perform a complex task that requires multiple steps and coordination

D : When the operator needs to learn about the safety rules and regulations that apply to the work process

Answer: A

Question 4

Some newer microprocessor-based single loop controls can do the following things that lead to the controllers sometimes being called hybrid control systems:

A : They can execute more than one PID control algorithm for a process loop, by time-sharing their calculating power.

B : They can communicate with other controllers and SCADA systems via network protocols.

C : They can store programs and data in non-volatile memory for high reliability and easy maintenance.

D : All of the above.

Answer: A

Question 5

How many nodes can be connected to an AS-interface network?

A : 31

B : 62

C : 93

D : 124

Answer: A

Page: 1 / 112

Total 557 Questions | Updated On: Jan 13, 2026

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