API 653 Practice Questions, Set 2 (Free)
Three more free API 653 practice questions on weld records, radiographic markers and thin tank files, with full explanations, plus 2027 dates and fees.
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Certification insight
Exam guidance written from the standards
Practical, referenced articles on what certification exams actually test — how they are structured, how they are scored, and what to study. Every claim is sourced, and nothing here is a reproduction of exam content.
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AI & Data 3 articles
Machine learning, data engineering and analytics certifications, plus how AI is changing the way technical exams are written and marked.
IT & Cloud 2 articlesLinux, cloud platforms, virtualisation, containers and enterprise systems certifications, from LPIC to Microsoft role-based exams.
Engineering & Inspection 3 articlesAPI, ASME and ASNT credentials for pressure equipment, piping, welding, GD&T and nondestructive examination.
Exam Strategy 3 articlesEvidence-based study method that applies across every certification: spacing, retrieval practice, error logs and timed rehearsal.
Certification guides
ASME GDTP Practice Questions (Free, With Explanations)
Three free ASME GDTP Technologist practice questions with full explanations, plus the section weights, pass mark and drawing habits behind them.
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API 510 Formulas With Worked Examples
The API 510 remaining life calculation worked on two components, with the field habits behind it and the traps that cost marks on exam day.
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API 570 Formulas With Worked Examples
The API 570 corrosion rate, remaining life and interval calculations worked step by step, with the field habits behind them and the traps the exam sets.
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ASME GDTP Formulas With Worked Examples
The GD&T arithmetic behind the ASME GDTP Technologist exam: virtual condition, bonus tolerance and boundaries, worked step by step with the traps.
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ASNT UT Level II UT Physics: Terms People Mix Up
Dead zone vs near field, attenuation vs impedance, gain vs reject: the UT physics terms Level II candidates confuse, with a table and field examples.
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API 510 Thickness and Intervals: Terms People Mix Up
Metal loss, corrosion rate, remaining allowance, remaining life, MAWP, static head and joint efficiency: the API 510 Domain I terms candidates swap.
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API 570 General Practical Knowledge: Terms People Mix Up
Repair or alteration, WPS or PQR, pressure design or required thickness: the API 570 term pairs candidates confuse, with a table and a worked case.
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API 653 Formulas With Worked Examples
Corrosion rate and remaining life worked three ways: US units, SI units and a corrosion allowance. See which formulas to know cold and where the traps sit.
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Latest
What blueprint-aligned practice tests actually mean
Most practice tests are written to a topic list, not an exam blueprint. Here is the difference, and how to tell which one you bought.
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AI-103 Replaces AI-102: What Changed for AI Engineers
AI-102 retired in June 2026 and AI-103 now covers the Azure AI engineer role. Compare the domains, the new agent skills, and a 6-week plan to prepare well.
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AI-200 Replaces AZ-204: What Changed in 2026
AZ-204 retired in July 2026 and AI-200 now tests Azure back ends for AI apps. Compare the domains, what was dropped, and get a 6-week plan to prepare well.
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AI-901 Replaces AI-900: What Changed in 2026
AI-901 replaces AI-900 with a Foundry-heavy, Python-aware exam. See the new domains, what was dropped, and a 4-week plan to prepare with confidence.
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API 510, 570 or 653: which should you take first?
Three API inspection certifications, one exam format, three completely different reference lists. How to choose, and why the overlap is smaller than it looks.
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The API open-book session: what you can look up
Sixty questions, 3 h 45 min, references on screen only. What the open half of an API inspection exam actually asks, and why it is not the easy half.
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What 8,600 practice questions reveal about exams
We measured our whole question bank: stem length, domain spread, open-book share. The findings say more about the exams than about the writing. Free to cite.
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LPIC-3 305-300: what the virtualisation exam expects
60 questions in 90 minutes, scaled 200-800 with a pass at 500, covering KVM, Xen, containers and provisioning. What to study and in what order.
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Are AI and data certifications worth taking in 2026?
AI credentials multiplied faster than the standards behind them. How to tell a rigorous data certification from a badge with a marketing budget.
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The API 510 exam structure, explained properly
170 questions, two sessions, a scaled pass mark and a reference set that changes. What the API 510 exam actually asks of you.
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How to study for a technical exam: evidence-based method
Retrieval practice, spaced repetition and error logging beat re-reading. Here is how to apply all three to a certification syllabus.
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