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 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

Question 2

What sensor malfunction that causes values for a particular variable to be grossly out of range describes which process data?

A : Outliers

B : Noise

C : Drift

D : Bias

Answer: A

Question 3

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 4

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 5

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

Page: 1 / 112

Total 557 Questions | Updated On: Jan 13, 2026

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