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: May 12, 2026

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Question 1

Which of the following is the next step in the cycle after housekeeping tasks such as communication with operator:

A : Update Inputs

B : Execute Program

C : Update Outputs

D : Initialize Hardware

Answer: A

Question 2

What is the main function of the highest layer in a communications stack?

A : It creates communication channels between devices.

B : It coordinates the data transfer between end systems and hosts.

C : It translates data formats between applications and networks.

D : It interacts with the user and provides network services.

Answer: A

Question 3

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 4

What is the main function of the highest layer in a communications stack?

A : It creates communication channels between devices.

B : It coordinates the data transfer between end systems and hosts.

C : It translates data formats between applications and networks.

D : It interacts with the user and provides network services.

Answer: A

Question 5

What is true of both single-phase and polyphase AC motors:

A : They both use a rotating magnetic field to induce torque in the rotor.

B : They both require a capacitor to create the necessary phase shift for starting.

C : They both have the same number of stator windings and rotor poles.

D : They both have the same efficiency and power factor

Answer: A

Page: 1 / 112

Total 557 Questions | Updated On: May 12, 2026

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