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

When evaluating the success of an automation project, which factors differentiate the customer's perspective from the service provider's perspective?

A : The customer focuses on the benefits and value of the project, while the service provider focuses on the cost and performance of the project

B : The customer focuses on the alignment of the project with the strategic goals and vision of the organization, while the service provider focuses on the technical aspects and quality of the project

C : The customer focuses on the satisfaction and experience of the end users, while the service provider focuses on the collaboration and coordination of the stakeholders

D : All of the above

Answer: A

Question 2

A resistor is used in a current loop system to convert the current signal to a voltage signal that can be measured by an indicator or a controller. The value of the resistor determines the voltage range that corresponds to the current range. For example, in a 4 to 20 mA system with a 250 ohm resistor, the voltage range is 1 to 5 V, because V = IR, where V is the voltage, I is the current, and R is the resistance. What is the value of resistance?

A : 50 ohms

B : 100 ohms

C : 125 ohms

D : 150 ohms

Answer: A

Question 3

Which of the following information is included in the physical layer of the ISO/OSI seven-layer stack?

A : The layout of pins, voltages, and other physical requirements.

B : The transmission and reception of unstructured raw data over a physical medium.

C : The electrical signals that are used to encode the data over the wire.

D : All of the above.

Answer: A

Question 4

What is the main difference between a loop diagram and a P&ID?

A : loop diagram shows more details about the field instruments and their wiring, while a P&ID shows more details about the process and its piping

B : A loop diagram shows more details about the process and its piping, while a P&ID shows more details about the field instruments and their wiring

C : A loop diagram shows more details about the control system and its logic, while a P&ID shows more details about the field instruments and their wiring

D : A loop diagram shows more details about the field instruments and their wiring, while a P&ID shows more details about the control system and its logic

Answer: A

Question 5

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

Page: 1 / 112

Total 557 Questions | Updated On: Jan 13, 2026

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