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 04, 2026

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Question 1

Which of the following BEST describes the different technology logic systems used in safety systems?

A : They are systems that use sensors, logic solvers, and final control elements to take the process to a safe state in case of an emergency.

B : They are systems that use switches, relays, and valves to control the process variables and prevent any safety hazards.

C : They are systems that use transmitters, controllers, and actuators to monitor the process conditions and optimize the performance.

D : They are systems that use scanners, computers, and displays to collect and analyze the process data and provide feedback.

Answer: A

Question 2

In an instrument air system, the dew point analyzer should be mounted at the:

A : ompressor inlet

B : Compressor outlet

C : Dryer outlet

D : Receiver outlet

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

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

Which of the following BEST describes the different technology logic systems used in safety systems?

A : They are systems that use sensors, logic solvers, and final control elements to take the process to a safe state in case of an emergency.

B : They are systems that use switches, relays, and valves to control the process variables and prevent any safety hazards.

C : They are systems that use transmitters, controllers, and actuators to monitor the process conditions and optimize the performance.

D : They are systems that use scanners, computers, and displays to collect and analyze the process data and provide feedback.

Answer: A

Page: 1 / 112

Total 557 Questions | Updated On: Jan 04, 2026

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