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 (31)
✍️ 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 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.
5. 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.
6. A control loop is oscillating with increasing amplitude after a setpoint change. What is the most likely cause?
Excessively high proportional gain causes the controller to over-correct, leading to growing oscillations and instability.
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What Practice Test Geeks adds beyond an AI chat for ISA CAP
An AI chatbot can quiz you, but it can't reproduce the exam conditions or keep your record. Here you get:
- A timed, full-length ISA CAP mock exam — 150 questions in 210 minutes with a 70% pass mark, modeled on the official exam's question count and time limit, followed by a score report broken down by exam domain.
- A fixed ISA CAP question bank: the same test every attempt, so your score is comparable from one try to the next instead of changing with every regenerated quiz.
- Progress saved on your device: completed tests, scores and missed questions stay in My Progress, so you can retake only what you got wrong.
- A printable ISA CAP cheat sheet you can print or save as a PDF.
- ISA CAP flashcards built from the same question bank.
- Free ISA CAP practice tests with the correct answer shown after each question.
How this page was made: written with AI tools and published by Nathan Beja, founder of Practice Test Geeks, who is responsible for its content. Exam facts are checked against the official sources listed below. Not reviewed by a subject-matter expert. Editorial policy
Sources & references
Exam facts on this page (fees, format, dates, passing scores) are checked against these official sources; the date is our last check. Editorial policy
- isa.org — Fees, registration deadline, test dates, score validity, retake fee, retake policy, score release, time limit · verified Oct 2026