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: Mar 05, 2026

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Question 1

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 2

After accessing the data in the OPC server, how does the operator specify parameters for graphic object animations in the HMI software?

A : y dragging and dropping the data items from the OPC server browser to the graphic objects on the HMI screen.

B : By selecting the graphic objects on the HMI screen and entering the data item names and values in the properties window.

C : By creating a tag database that links the data items from the OPC server to the graphic objects on the HMI screen.

D : By writing a script that assigns the data items from the OPC server to the graphic objects on the HMI screen.

Answer: A

Question 3

Availability measures the percentage of time that a system is operational, while reliability measures the probability that a system performs its intended function without failure.

A : TRUE

B : False

C : It depends on the context

D : None of the above

Answer: A

Question 4

How can the linked relationship between a P&ID and loop sheets be shown in a diagram?

A : y using the same device abbreviation and loop number for each instrument in both the P&ID and the loop sheet

B : By using the same symbols and layout for each unit and pipe in both the P&ID and the loop sheet

C : By using the same color scheme and font size for each component and label in both the P&ID and the loop sheet

D : By using the same scale and orientation for each diagram in both the P&ID and the loop sheet

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: Mar 05, 2026

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