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What This Practice Exam Covers

The South Carolina Marine licensing exam is 50 questions with a 180-minute time limit. You need a 70% to pass — that's 35 correct answers minimum.

This site gives you two ways to prepare:

Free practice exam: 10 questions per attempt, pulled from a limited pool. You can retake it as many times as you want. It's a solid way to get a feel for the format and see where your knowledge stands before committing to full prep.

Full practice exam: 50 questions, 180-minute timer — same format as the real exam. Questions are drawn from a pool of 269+ items, so every attempt gives you a different mix. No duplicate exams. Topics match what the official test provider specifies. This is the tool for serious preparation.

Start with the free exam. If your score is close to 70% or below, the full exam pool will show you where the gaps are.

What You'll Be Tested On

The exam covers four topic areas. Here's what each one actually demands.

Safety – Marine (6 items)

Six questions doesn't sound like much, but this section mixes regulatory knowledge with applied judgment. Expect questions drawn from Subpart O marine operations safety requirements — things like equipment positioning, personnel safety, and site-specific marine hazards.

Floating cranes and cranes on barges require you to understand stability concepts: list (side-to-side tilt), trim (fore-and-aft tilt), and free surface effect (how liquid cargo or ballast in a partially filled tank reduces stability). Know how adding or shifting a load changes barge behavior.

Marine hoisted personnel transfer is its own subtopic. You need to know what makes a personnel transfer over water acceptable — basket specifications, rigging requirements, and the conditions that require added precautions.

Cofferdams show up with specific focus areas: controlled flooding procedures, guardrail requirements, evacuation warning systems, and how proximity to active navigation channels affects your obligations.

Caissons under compressed air are a distinct area. Expect questions on medical requirements for workers in compressed-air environments, man lock procedures, and decompression schedules.

Subaqueous excavation is grounded in South Carolina law. The exam cites the South Carolina 811 Excavator Manual (2024) directly. Know the notification requirements, tolerance zone distances around marked utilities, and the specific code sections referenced in Pages 13, 15, 20–22, 28–29, 54–55, and 59 of that manual.

Miscellaneous Engineering – Pile Driving (25 items)

This is half the exam. Budget your time here and know the material cold.

Pile types: Timber, concrete (including precast-prestressed), steel, and sheet piles each have distinct characteristics. The exam pulls from Construction Equipment Guide, Chapter 17 on timber pile quality, treated timber piles, and precast-prestressed concrete piles. Know classification criteria — what makes a pile acceptable for a given application.

Load transfer mechanisms: Friction piles develop capacity along the shaft; end-bearing piles transfer load at the tip. Know which soil conditions favor each and what happens when both mechanisms combine.

Hammer types: Single-acting, double-acting, diesel, hydraulic, and vibratory — know how each works and what each is best suited for. The exam cites Chapter 17's Hammer Selection section specifically.

Engineering News pile formula: This is a calculation question. The formula relates energy per blow, set (penetration per blow), and pile resistance. Practice solving it from scratch. Know what each variable represents and what units you're working in.

Support systems: Fixed leads, swing leads, batter pile configurations, and templates each have specific applications. Know when a batter pile is used and what it does structurally.

Auxiliary techniques: Jetting, spudding, and preaugering are used to assist pile installation through dense or obstructed material. Know what each technique involves and the conditions that require it.

Swing angle production calculations also appear — Construction Equipment Guide, Chapter 9 covers how swing angle affects excavator output.

Concrete (15 items)

Mix design: The water-to-cementitious-materials ratio controls strength and durability. Lower ratio = stronger, less permeable concrete. Know how aggregate sizing and admixtures (air-entraining agents, plasticizers, accelerators, retarders) shift mix properties. Design and Control of Concrete Mixtures is the primary source here — multiple specific page references are tested.

Fresh concrete properties: Slump measures workability. Bleeding, air content, and consistency each have defined test methods. Know acceptable ranges and what causes each property to be out of spec.

Batching, mixing, and transporting: Ready-mixed concrete has time and revolution limits. Know what happens to workability and strength when those limits are exceeded.

Placement and formwork: Subgrade preparation requirements before placement, form pressures based on pour rate and concrete unit weight, and consolidation methods (vibration, rodding) are all tested. Design and Control of Concrete Mixtures, EB001, Chapter 17 covers subgrade preparation specifically.

Curing: Moist curing, membrane-forming compounds, temperature minimums and maximums — know the minimum curing durations and the temperature thresholds that protect early strength gain.

Durability: Freeze-thaw resistance requires air entrainment — know the target air content ranges by aggregate size. Sulfate attack resistance depends on cement type and w/cm ratio. Permeability and abrasion resistance round out this subtopic.

Concrete – Reinforcing Steel (4 items)

Four questions, but they cover specific details that candidates skip in study.

Bar identification: The CRSI marking system tells you mill, bar size, steel type, and grade from the deformations on the bar. CRSI Placing Reinforcing Bars, Chapter 7 (Figure 7-2 and Table 7-2) is directly cited.

Bar sizes and ASTM specs: Know the standard bar designations (#3 through #18), their nominal dimensions, and which ASTM specifications govern each grade.

Concrete cover: Cover requirements differ by structural member type and exposure condition. Slabs, beams, columns, and footings each have different minimums. The Ironworker Reference, Chapter 11 sections on concrete cover are cited.

Placement tolerances: Know the allowable deviation from specified bar position. Chapter 11 of both CRSI Placing Reinforcing Bars and the Ironworker Reference specify these tolerances for stirrup spacing, wall bars, and slab bars.

Splices: Lap splice length depends on bar size and development length. Mechanical splices and welded splices have different strength requirements and inspection standards. CRSI Placing Reinforcing Bars, Chapter 11 covers all three.

Worked Sample Questions

Question 1 — Pile Driving: Excavator Swing Angle

One hydraulic shovel manufacturer states that optimum production is obtained at a swing angle of 70 degrees. According to this manufacturer, by what percentage does productivity decrease with each additional 30 degrees of swing?

• A. 16%
• B. 8%
• C. 20%
• D. 12% ✓

Why D is correct: The manufacturer's published data states that for every 30 degrees of swing beyond the optimum 70-degree angle, productivity drops by 12%. This is a straight lookup — the exam tests whether you know the specific figure, not whether you can derive it. Source: Construction Equipment Guide, Chapter 9 – Excavators, Angle of Swing Effect on Shovel Production.

Question 2 — Concrete: Ordering Volume

Using the printed ordering rule, how much concrete should be ordered for the continuous footing? (Figure FN-1)

• A. 4.75 cu yd
• B. 5.25 cu yd ✓
• C. 5 cu yd
• D. 5.5 cu yd

Why B is correct: Calculate the net footing volume from the figure dimensions — that works out to 5.10 cubic yards. The ordering rule requires rounding UP to the next quarter yard. 5.10 rounds up to 5.25, not down to 5.00. Rounding down risks a short pour. Source: Carpentry and Building Construction — Ch. 10, Estimating Footings, Foundation Walls and Concrete Block.

Question 3 — Safety: Fall Protection Trigger Height

OSHA fall protection for residential construction starts at:

• A. 6 ft ✓
• B. 4 ft
• C. 8 ft
• D. 10 ft

Why A is correct: OSHA requires fall protection at 6 feet for residential construction. General industry uses 4 feet; construction uses 6 feet for most work; residential holds at 6 feet. Mixing these thresholds is a common error on safety questions.

How to Read Your Score

Passing is 70% — 35 out of 50 correct.

Treat your first practice attempt as a diagnostic, not a verdict. A 65% first score doesn't mean you'll fail; it tells you exactly which topic areas to work on. A 55% tells you the same thing, just louder.

Look at your results by topic. Pile Driving is 25 of 50 questions. If you're weak there, that's where your study time goes — a 10-point improvement in Pile Driving alone can shift you from failing to passing. Concrete at 15 items is the second priority. Safety and Reinforcing Steel have fewer items, but they're not free points if you ignore them.

Scoring 70–75% on practice usually means you're borderline. The real exam uses different question phrasings and figure references than any practice set. If you're right at the line on practice, put in another cycle of review on the topics where you lost the most points before you sit.

A score above 80% on a full 50-question practice exam, consistently, is a reliable indicator of readiness.

Where Candidates Lose Points

Pile Driving calculation errors. The Engineering News formula has specific units — net energy in foot-pounds, set in inches per blow. Plugging in the wrong unit or forgetting to convert is the most common calculation mistake on this exam. Work the formula slowly and check units every time.

Swing angle and production tables. Questions from Chapter 9 – Excavators require you to know specific percentages and multipliers. Candidates who try to estimate or use logic instead of the actual table values get these wrong.

Concrete cover and tolerance confusion. Reinforcing Steel questions test specific numbers — the wrong cover value for the wrong member type, or a fabrication tolerance vs. a placement tolerance. These are distinct figures. Don't blur them together.

Concrete ordering round-up rule. Candidates who calculate net volume correctly and then round down instead of up select the wrong answer. The ordering rule always rounds up to the next quarter yard.

SC 811 notification details. The subaqueous excavation questions require you to know South Carolina-specific tolerance zones and notification timelines. Generic knowledge of utility notification isn't enough — the exam cites specific pages of the South Carolina 811 Excavator Manual (2024).

Running long on Pile Driving. Twenty-five questions is half the exam. Candidates who spend too long on multi-step calculations early can run short of time at the end.

Exam Quick Facts