ISA CAP Study Guide 2026
Everything you need to pass the ISA CAP exam in one place: the exam format, every topic to study, real practice questions with explanations, flashcards, and full-length practice tests. Free, no sign-up needed.
📋 ISA CAP Exam Format at a Glance
📚 ISA CAP Topics to Study (63)
✍️ Sample ISA CAP Questions & Answers
1. In FOUNDATION Fieldbus, what is the function of a 'function block'?
Function blocks are standardized software algorithms (e.g., AI, PID, AO) that execute within fieldbus devices to implement control and I/O functions.
2. Which regulation requires chemical facilities to perform a Process Hazard Analysis (PHA) and revalidate it every five years?
OSHA PSM (29 CFR 1910.119) requires an initial Process Hazard Analysis and revalidation at least every five years for covered processes.
3. A level controller is in automatic but the level continues to drift downward even though the outlet valve is fully closed. What is the most likely root cause?
If the valve is confirmed fully closed yet level still falls, material must be leaving through an undetected path such as a leaking valve seat, drain, or bypass.
4. What does 'marshalling' refer to in the context of automation I/O design?
Marshalling involves collecting and organizing field instrument wiring at marshalling cabinets before routing signals to the appropriate controller I/O cards.
5. What is the purpose of filter time constant selection on a derivative (D) term in a PID controller?
The derivative filter limits the bandwidth of D-action, preventing the controller from reacting aggressively to measurement noise that would otherwise be amplified.
6. What does the term 'functional safety' refer to in automation?
Functional safety in automation refers to the ability of a system to operate safely even under fault conditions. It ensures that safety-related control systems can detect failures and bring the process to a safe state, preventing harm to people, damage to equipment, or environmental impact. This involves rigorous design, testing, and validation to meet specified safety integrity levels.