Free ISA-IEC ISA-CAP Exam Questions

Become ISA-IEC Certified with updated ISA-CAP exam questions and correct answers

Page: 1 / 112

Total 557 Questions | Updated On: Jan 04, 2026

Add To Cart

Question 1

Which of the following control valves is most suitable for handling a low pressure drop in a pipe over two inches in diameter?

A : all valve

B : Globe valve

C : Diaphragm valve

D : Butterfly valve

Answer: A

Question 2

What is the name of the device that can detect water level in a well pump and shut off the power to the pump if it senses a dry run condition?

A : Pump controller

B : Float switch

C : Cycle sensor

D : Leak defender

Answer: A

Question 3

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 4

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 5

Which of the following is not a valid form of PID algorithm implemented in modern PID controllers?

A : Parallel form

B : Ideal form

C : Series form

D : Hybrid form

Answer: A

Page: 1 / 112

Total 557 Questions | Updated On: Jan 04, 2026

Add To Cart