ABYC Marine Systems Certification Exam: free practice test
The broadest ABYC certification: fuel, water, sanitation, ventilation, LPG, exhaust, thru-hulls, steering and engine controls, fire protection, air conditioning and basic electrical. Standards include H-2, H-22, H-23, H-24, H-25, H-27, H-32, H-33, A-1, A-4, A-6, A-24, P-1, P-14, P-28 and E-11.
Watch the free 4:41 video lesson: the key ABYC Marine Systems concepts →
Premium: 3,000 practice questions, 6 full mock exams, 800 flashcards and 60 comprehensive key notes, topic by topic. See the study path ·
- Lesson 2: H-24 gasoline tanks: pressure tests and labelsTank leak tests, mounting, labeling and the fill, vent and pickup rules.
- Lesson 3: Fuel hose, clamps and anti-siphon protectionUSCG hose types, clamp rules and stopping siphoning through a broken line.
- Lesson 4: H-25 portable and H-33 diesel fuel systemsPortable tank rules, diesel returns, fuel filters and grounding for static.
- Lesson 5: H-2 gasoline ventilation and blower sizingNatural and powered ventilation, duct placement, blower capacity and labels.
- Lesson 6: Ignition protection and H-32 diesel ventilationWhich devices must be ignition protected and how diesel spaces are ventilated.
- Lesson 7: A-1 LPG lockers, valves and leak testsCylinder lockers, remote shutoffs, regulators, gauges and system leak testing.
- Lesson 8: Carbon monoxide: A-24 detectors and TH-22Where CO detectors go, how CO enters boats and exhaust inspection points.
- Lesson 9: H-23 potable water systems and tanksCross-connection rules, tank fills, pumps, accumulators and water heaters.
- Lesson 10: Marine sanitation devices and holding tanksMSD types, holding tank venting, discharge rules and no-discharge zones.
- Lesson 11: H-22 bilge pumps and back-siphon protectionPump capacity, automatic switch wiring, discharges and vented loops.
- Lesson 12: Storage tank installation for water, fuel, wasteSupports, chafe protection, materials and access for every tank type.
- Lesson 13: H-27 seacocks, thru-hulls and drain plugsHeeled waterline, strength test, accessibility and drain plug rules.
- Lesson 14: P-1 wet and dry exhaust systemsExhaust hose, water lift mufflers, siphon breaks and back-flooding traps.
- Lesson 15: Shaft seals and stern gear basicsPacking glands, dripless seals and the inspection points the exam tests.
- Lesson 16: Electrical theory for systems techniciansOhm's law, power, series and parallel circuits with marine examples.
- Lesson 17: E-11 wire sizing and voltage dropCircular mil formula, ampacity tables and full worked sizing problems.
- Lesson 18: Overcurrent protection placement and ratingsSeven-inch rule, its exceptions, starter cables and breaker sizing.
- Lesson 19: Batteries, chargers and inverters: A-31, A-32Battery securing, location, charger and inverter installation rules.
- Lesson 20: Bow thruster and windlass wiringHigh-current circuits, voltage drop, protection and control wiring.
- Lesson 21: P-14 and P-28 steering and engine controlsCable routing, start-in-gear protection, electronic control fault states.
- Lesson 22: A-4 fire protection: portable and fixedExtinguisher classes and ratings, fixed systems and engine shutdown.
- Lesson 23: A-6 air conditioning and refrigeration installsRaw-water supply, condensate drains, ducting and refrigerant handling.
Keep going after the free lesson. Every topic gets its own lesson, plus the full question bank, timed simulations and study tools.
About the ABYC Marine Systems exam
The broadest ABYC certification: fuel, water, sanitation, ventilation, LPG, exhaust, thru-hulls, steering and engine controls, fire protection, air conditioning and basic electrical. Standards include H-2, H-22, H-23, H-24, H-25, H-27, H-32, H-33, A-1, A-4, A-6, A-24, P-1, P-14, P-28 and E-11.
What's on the exam
Each branch is a topic in the official outline. Members see every key fact on the full mind map. Read the free study guide →
How to pass the ABYC Marine Systems exam
- 213 questions in 3.5 hours is just under 1 minute each, the tightest pace of all 10 ABYC exams.
- The cut score is 83.1%, so you can miss only about 36 questions across more than 20 standards. Spread your study; don't over-invest in electrical.
- Know which standard covers what (H-24 gasoline fuel, H-33 diesel fuel, H-27 seacocks, A-1 LPG, P-1 exhaust). Questions often name the system, not the standard number.
- Many fuel and ventilation rules come from the US Coast Guard regulations in 33 CFR 183 as well as ABYC. Learn the shared numbers once.
Save your results and get your Readiness Score
Create a free account after the test: your score by topic, a mistakes bank, the complete study notes for the first topic, flashcards and the ABYC Numbers & Formulas Sheet.
What's in the premium ABYC Marine Systems prep
Premium ABYC Marine Systems prep is studied one topic at a time. Each step starts with that topic's key notes and flashcard deck, then its own question sets of 25, so you master one topic before you move to the next. When every topic is strong, the 6 full mock exams show you're ready.
Your step-by-step study path
- 1Gasoline and Diesel Fuel Systems9 key notes, 115 flashcards, then 450 practice questions in 18 sets of 25Notes free with an account
- 2Ventilation, LPG and Carbon Monoxide9 key notes, 115 flashcards, then 425 practice questions in 17 sets of 25Premium
- 3Water, Sanitation and Bilge Systems9 key notes, 115 flashcards, then 425 practice questions in 17 sets of 25Premium
- 4Thru-Hulls, Seacocks and Exhaust9 key notes, 115 flashcards, then 425 practice questions in 17 sets of 25Premium
- 5Electrical Basics for Systems Technicians8 key notes, 115 flashcards, then 425 practice questions in 17 sets of 25Premium
- 6Steering and Engine Controls8 key notes, 115 flashcards, then 425 practice questions in 17 sets of 25Premium
- 7Fire Protection, A/C and Refrigeration8 key notes, 110 flashcards, then 425 practice questions in 17 sets of 25Premium
- Final step: 6 full mock exams213 questions each, timed like test day. Pass them, then book your exam.Premium
Read the complete ABYC Marine Systems study notes for “Gasoline and Diesel Fuel Systems”
Our first full set of comprehensive notes, about 14 minutes of reading: Reading fuel hose markings · Tanks and testing · Anti-siphon protection and grounding · How diesel differs, a worked exam example, the traps examiners use and a one-minute recap. Create a free account to read it and see how premium notes work before you decide.
Study tools included
3,000 practice questions
3,000 exam-style questions per exam, organized topic by topic in sets of 25. Every answer explained, with the rule it comes from.
6 full mock exams
6 full-length timed mock exams per exam, with real question counts and time limits, so test day feels like practice day.
Exam Readiness Score
One 0 to 100 number that tells you when you're ready to book. Reach 80 and you're covered by our Pass Guarantee.
800 flashcards + spaced repetition
800 flashcards per exam, in a deck for each topic, that come back right before you'd forget them. Five minutes a day keeps every number fresh.
60 comprehensive key notes
60 key notes per exam, split across its topics and each explained in full: the concepts, worked exam examples, the traps examiners use and a quick recap. Your first set is free with an account.
Mind maps
See the whole exam on one screen: every topic and the facts under it.
Sample questions with answers
These are the questions in the free test above, with answers. Try the test first. You'll learn more by getting some wrong.
1. A gasoline fuel supply hose runs through the engine compartment and is always full of fuel. Which USCG hose type is required?
2. A permanently installed gasoline fuel tank must not leak when pressure-tested at:
3. What is the purpose of an anti-siphon valve at the outlet of a gasoline tank?
4. The required warning label for a gasoline boat with a powered ventilation system tells the operator to run the blower for how long before starting the engine?
5. Why must an LPG cylinder locker be vented and drained at its bottom, overboard?
6. An alternator, starter or blower motor mounted in a compartment with a gasoline engine must be:
7. A 72-foot yacht is being fitted with a marine sanitation device. Which USCG types are permitted?
8. How should an automatic bilge pump circuit be connected so it keeps working when the boat is left with the main battery switch off?
9. Under ABYC H-23, what must a boat's potable water system never be?
10. Under ABYC H-27, a seacock installation must withstand what static force applied to the inboard end of the assembly?
11. Which hull penetrations does ABYC H-27 require to have a seacock?
12. Hose used in a water-cooled (wet) exhaust system should be marked to which standard?
13. Under ABYC E-11, which of these circuits must be sized for no more than a 3% voltage drop?
14. What does start-in-gear protection on a propulsion control do?
15. A marine fire extinguisher intended for gasoline, oil or grease fires carries which class letter?
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- One ABYC exam of your choice: any of the 10 certifications, from Marine Electrical to USCG Regulations
- 3,000 practice questions + 6 full mock exams per exam
- 800 flashcards + 60 key notes per exam, by topic, plus mind maps
- Spaced repetition + mistakes bank
- Readiness Score & detailed reports
- Video lessons as they release
- Content updates during your access
- 5 bonuses: numbers and formulas sheet, standards map, study planner and more
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- One ABYC exam of your choice: any of the 10 certifications, from Marine Electrical to USCG Regulations
- 3,000 practice questions + 6 full mock exams per exam
- 800 flashcards + 60 key notes per exam, by topic, plus mind maps
- Spaced repetition + mistakes bank
- Readiness Score & detailed reports
- Video lessons as they release
- Content updates during your access
- 5 bonuses: numbers and formulas sheet, standards map, study planner and more
- Pass Guarantee: complete the prep, pass or 100% back
Renews once a year until you cancel. We email you before each renewal. Cancel any time from your account; you keep access until the end of the year you've paid for.
Certification guide
ABYC certification exam guide (2026): ABYC certification exams are long, all multiple choice and have high cut scores: you need 77.2% to 85% to pass, and 82.5% or more on eight of the 10. This guide covers all 10 current certifications, what they test, how they're delivered and how to prepare. All figures are from the [American Boat & Yacht Council](https://abycinc.org/education/certification-program/proctored-testing/) as of November 2026.
ABYC Marine Systems exam FAQ
How many questions are on the ABYC Marine Systems exam?
213 multiple-choice questions, with a time limit of 3.5 hours. Format: proctored, computer-based multiple choice; reference-material rules are not stated on the public exam pages, so confirm them when you book.
What is the passing score for ABYC Marine Systems?
83.1% (ABYC's published cut score).
How much does the ABYC Marine Systems exam cost?
Exam only: US$295 for ABYC members, US$595 for nonmembers, per attempt (2026). Study guide US$85 member / US$175 nonmember. Class fees vary; check ABYC's class calendar. ABYC charges members less than nonmembers, so confirm current fees with ABYC before you book.
Which languages is the ABYC Marine Systems exam offered in?
English.
Where do I take the ABYC Marine Systems exam?
Online with a remote proctor (webcam, microphone, Chrome, government ID, single monitor), or at the end of an ABYC certification class.
Is this ABYC Marine Systems practice test free?
Yes. The 15-question practice test on this page is free, with an explanation for every answer and no signup. A free account also unlocks the complete study notes for the first topic. The full ABYC Marine Systems prep is Premium at $147 a month for this exam.
What's in the premium ABYC Marine Systems prep?
3,000 practice questions organized topic by topic (Gasoline and Diesel Fuel Systems: 450; Ventilation, LPG and Carbon Monoxide: 425; Water, Sanitation and Bilge Systems: 425; Thru-Hulls, Seacocks and Exhaust: 425; Electrical Basics for Systems Technicians: 425; Steering and Engine Controls: 425; Fire Protection, A/C and Refrigeration: 425), 6 full-length timed mock exams of 213 questions, 800 flashcards and 60 comprehensive key notes split across all 7 topics, plus a mistakes bank and the Readiness Score.
Compare ABYC Marine Systems with the other ABYC certifications
- ABYC Marine Electrical vs ABYC Marine Systems
- ABYC Marine Systems vs ABYC Engines & Fuel Systems
- ABYC Marine Standards vs ABYC Marine Systems
- ABYC Marine Systems vs ABYC A/C Refrigeration
Related practice tests
ABYC Marine Electrical Certification Exam
ABYC's most widely held certification.
ABYC Marine Corrosion Certification Exam
For technicians and surveyors who diagnose and prevent corrosion.
ABYC Marine Engines and Fuel Systems Certification Exam
ABYC's engine certification for gasoline and diesel inboards, outboards, sterndrives and saildrives.
Exam details are summarized from the official candidate information available in November 2026. ABYC changes formats and fees, so confirm with American Boat & Yacht Council (ABYC) before you book. ABYCExamPrep is not affiliated with the American Boat & Yacht Council.