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Pass the Offshore Corrosion Assessment Technician exam with confidence.

Start with a free O-CAT practice test and build exam-ready confidence for the Offshore Corrosion Assessment Technician exam.

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1000+O-CAT Questions
8Exam Domains
10Free Questions
2026Updated
What you get

Everything your O-CAT certification prep needs

Practice expert-vetted questions, find your weak domains, and turn every mistake into a focused review plan.

Expert-vetted questions

Every question is reviewed by an experienced O-CAT professional for clarity, accuracy and practical exam relevance.

See what to study next

Domain analytics show which parts of the exam blueprint are holding you back.

Turn mistakes into confidence

Missed questions become a review list, so nervous guessing turns into focused repetition.

1,000+ exam-realistic questions
All 8 O-CAT domains
Weighted to the exam blueprint
Clear answer explanations
Updated for the 2026 exam
Instant, one-time access
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Your exam readiness

Track your readiness, domain strengths, and recent results at a glance.

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Study by domain

Practice the O-CAT exam by domain

1. Evaluate platform corrosion system (17-22%)

Key exam domain

Identify weak areas and improve with focused review.

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2. Testing Methods (16-21%)

Key exam domain

Identify weak areas and improve with focused review.

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3. Safety (1-4%)

Key exam domain

Identify weak areas and improve with focused review.

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4. Systems and requirements to collect information on platforms (12-17%)

Key exam domain

Identify weak areas and improve with focused review.

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5. Types of oil platforms/rigs & equipment (1-3%)

Key exam domain

Identify weak areas and improve with focused review.

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6. Primary corrosion protection systems (12-17%)

Key exam domain

Identify weak areas and improve with focused review.

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7. Role of BSEE and A-B-C- grading system for reporting (1-4%)

Key exam domain

Identify weak areas and improve with focused review.

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8. General Knowledge (24-28%)

Key exam domain

Identify weak areas and improve with focused review.

Start Practicing
Built for practice, not passive reading Active recall and repetition build real exam-day readiness.
Written to match the real exam Every question mirrors the style, difficulty, and phrasing of the actual O-CAT exam.
Aligned to the O-CAT blueprint Weighted across every exam domain, so you practice exactly what's tested.
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Before you decide

Frequently asked questions

Straight answers about the O-CAT exam, the questions, pricing, the free trial, and how this fits your prep.

The O-CAT exam spans 8 domains - Evaluate platform corrosion system (17-22%), Testing Methods (16-21%), Safety (1-4%), Systems and requirements to collect information on platforms (12-17%), Types of oil platforms/rigs & equipment (1-3%), Primary corrosion protection systems (12-17%), Role of BSEE and A-B-C- grading system for reporting (1-4%), and General Knowledge (24-28%). Every practice question maps to one of them, so you train on exactly what's tested.

The Offshore Corrosion Assessment Technician (O-CAT) exam has 92 questions and is completed in 2 hours 30 minutes. Our timed practice tests mirror that length and pacing, so exam day feels familiar.

No - and that matters. These are original practice questions written to mirror the style, difficulty, and domain coverage of the O-CAT exam blueprint. We never distribute actual exam content, so practicing here keeps you fully compliant with official exam policies.

No. O-CAT Exam Prep is an independent study resource for Offshore Corrosion Assessment Technician (O-CAT). It is not affiliated with, sponsored by, or endorsed by the official certifying body or exam administrator.

What candidates say

Trusted by O-CAT candidates

Real feedback from O-CAT candidates on Reddit.

★★★★★
Sourced from Reddit

"put this off for weeks then panicked about a month out. the practice questions on ocatexam.com saved me, especially the ones on primary corrosion protection systems. walked in more confident than i expected and passed."

r/oilandgasworkers Posted on Reddit
★★★★★
Sourced from Reddit

"wasnt sure a prep site could actually help with something this niche but the mistake review feature caught alot of dumb errors i kept repeating on the testing methods questions. didnt feel like wasted study time for once."

r/corrosion Posted on Reddit
★★★★★
Sourced from Reddit

"honestly just needed something to drill the general knowledge section since its the biggest chunk. did the mock exams a few times, timing got better each round. passed first try, no complaints."

r/NDT Posted on Reddit

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