NCCCO Load Chart Practice Test: 30 Questions With Full Explanations (2026)
Free NCCCO load chart practice test — 30 real-format questions with full explanations covering radius, capacity deductions, and rigging math for the 2026 exam.
TL;DR
Load chart questions are the single highest-leverage section on the NCCCO Core exam — roughly 20–25% of the 90-question test, and the section that fails the most candidates. Below are 30 practice questions written in the exact style and difficulty of the real exam, with full step-by-step explanations. Work through them in order, time yourself at 90 seconds per question, and aim to score 24/30 (80%) before you sit the real test. If you finish under-time and over-score, you are ready.
Why Load Charts Decide Whether You Pass
The NCCCO Core written exam is 90 multiple-choice questions in 2.5 hours, with a passing score of approximately 70%. About 20–25% of that — call it 18–22 questions — directly tests load chart reading, rated capacity, and rigging deductions. Candidates who know the regulatory material cold but can't read a chart fast enough still fail. The opposite is also true: candidates who drill load charts religiously tend to pass the Core on the first try. Three reasons load charts matter so much in 2026: 1. OSHA crane operator certification has been mandatory since November 10, 2018 under 29 CFR 1926.1427. There is no "experienced operator" loophole. Every operator on a U.S. construction site must hold a valid card from an accredited certifier, and NCCCO is the dominant program. 2. The U.S. has roughly 80,000+ licensed crane operators earning a median wage of $35–$45/hour (BLS, 2024 data). The card pays for itself fast — but only after you pass. 3. NCCCO certification is valid for 5 years, after which you must recertify. Recertification candidates fail load chart questions at higher rates than first-timers because they've been operating without re-reading their charts daily. Don't be that person. The Core is required before any specialty exam (Mobile, Tower, Overhead, Service Truck, Articulating). You can't shortcut your way around it. The Crane Prep app is built around this exact reality — see /apps/crane.
Load Chart Basics: The Five Numbers You Always Need
Before any practice question, internalize these five numbers from a load chart: boom length (in feet — extended length of main boom); load radius (in feet — horizontal distance from the crane's centerline of rotation to the center of gravity of the load; not the boom length, not the diagonal, horizontal); configuration (outriggers fully extended, mid-extended, retracted, or on rubber — each gets its own column); rated capacity (the gross weight on the chart at that boom length / radius / configuration intersection); and quadrant of operation (over-front, over-side, over-rear — capacities differ on truck-mounted cranes). Then apply the universal formula: Net Rated Capacity = Rated Capacity − Total Rigging Deductions. Rigging deductions include: hook block, headache ball, all slings (wire rope, chain, or synthetic), shackles, spreader bars, jib weight if attached, and any below-the-hook lifting device. If it hangs below the load line, it counts. Drill this with the calculator at /tools/crane-load.
Section A — Radius and Boom Length (Q1–Q6)
Q1. A crane is positioned 35 feet from the center of a load. The load is 8 feet wide. What is the load radius? A. 27 ft B. 31 ft C. 35 ft D. 39 ft. Answer: C. Load radius is measured to the center of gravity of the load, from the centerline of rotation. Width of the load doesn't change radius — only the centerline-to-CoG distance. Q2. Boom angle is 60° from horizontal, boom length is 80 ft. What is the approximate load radius? A. 40 ft B. 50 ft C. 60 ft D. 70 ft. Answer: A. Radius ≈ boom length × cos(angle) = 80 × cos(60°) = 80 × 0.5 = 40 ft. Memorize cos(60)=0.5, cos(45)=0.71, cos(30)=0.87. Q3. As load radius increases, rated capacity: A. Increases B. Decreases C. Stays the same D. Depends on boom length. Answer: B. Longer radius = more leverage against the crane = lower capacity. Always. Q4. A 100-ton crane shows 48,000 lb capacity at 30 ft radius and 32,000 lb at 40 ft radius. The boom must extend during the lift, increasing radius from 30 ft to 40 ft. Maximum allowable load weight? A. 48,000 lb B. 40,000 lb C. 32,000 lb D. 16,000 lb. Answer: C. Always use the worst-case (longest) radius the load will reach. Q5. Boom length is 100 ft. Boom angle is 70°. What is the load radius? A. 30 ft B. 34 ft C. 50 ft D. 94 ft. Answer: B. 100 × cos(70°) = 100 × 0.342 = 34.2 ft. Q6. "On rubber" capacity is generally: A. Higher than on outriggers B. Lower than on outriggers C. The same D. Only listed for tower cranes. Answer: B. On rubber means tires only, no outriggers — capacity is dramatically reduced, sometimes 25% or less of fully-outriggered capacity.
Section B — Reading the Chart (Q7–Q14)
Q7. A 90-ton telescopic crane, 70-ft boom, 30-ft radius, outriggers fully extended, over-rear: chart shows 42,500 lb. Same crane, same boom and radius, over-side: chart shows 28,000 lb. The lift will swing from rear to side. Which capacity governs? A. 42,500 B. 35,250 (avg) C. 28,000 D. 14,500. Answer: C. Always use the lowest capacity in the swing arc. Q8. The chart shows 35,000 lb in bold and 22,000 lb in italics at the same point. Italicized values typically indicate: A. Stability-limited B. Structural-limited C. Wire rope limited D. Estimated. Answer: B. Convention: bold = stability/tipping, italic or shaded = structural strength. Always use the lower number that applies. Q9. A capacity table shows "85%" at the top in some columns. This means: A. The chart is 85% accurate B. Listed values are 85% of tipping load (mobile chart convention) C. The crane operates at 85% load D. Boom is at 85% extension. Answer: B. Mobile cranes on outriggers are typically rated at 85% of tipping; crawler cranes at 75%. Q10. With outriggers fully extended on firm level ground, a chart shows 50,000 lb at 30 ft radius. With outriggers mid-extended, 30,000 lb at the same radius. You set up mid-extended by mistake. Maximum load? A. 50,000 B. 40,000 C. 30,000 D. Cannot lift safely. Answer: C. Always read the column matching your actual outrigger configuration. Q11. A jib is stowed (pinned to the boom but unused). Do you deduct jib weight? A. No, only when erected B. Yes, always when attached C. Only above 50 ft boom D. Only on lattice cranes. Answer: B. Stowed or erected, an attached jib adds weight. Q12. Chart shows capacity 28,000 lb at 30 ft radius / 80 ft boom. Footnote: "deduct 1,200 lb for stowed jib." Hook block 800 lb, slings 250 lb. Net capacity? A. 28,000 B. 26,800 C. 25,750 D. 24,000. Answer: C. 28,000 − 1,200 − 800 − 250 = 25,750 lb. Q13. A * or ** footnote on the chart is most likely: A. Decorative B. A warning the value is reduced for that condition C. A model-year code D. The manufacturer's logo. Answer: B. Asterisks always reference footnotes that modify the rating. Q14. A range diagram shows boom length and angle but no capacities. Why? A. Discontinued chart B. The diagram pairs with a separate capacity chart C. Setup only D. Capacity is unlimited. Answer: B. Range diagrams are the map; the load chart is the price tag.
Section C — Rigging Math (Q15–Q22)
Q15. A 10,000 lb load is suspended from a 2-leg sling at 60° from horizontal. Tension per leg? A. 5,000 B. 5,774 C. 7,071 D. 10,000. Answer: B. Per leg = (Load / # legs) × (1 / sin(angle)) = 5,000 × 1.155 = 5,774 lb. Q16. Same 10,000 lb load, 2-leg sling at 30° from horizontal. Tension per leg? A. 5,000 B. 5,774 C. 10,000 D. 17,320. Answer: C. (10,000/2) × (1/sin 30°) = 5,000 × 2 = 10,000 lb. At 30°, each leg carries 100% of the load weight. Q17. OSHA's recommended minimum sling-to-horizontal angle for safe lifting is: A. 15° B. 30° C. 45° D. 60°. Answer: B. Below 30°, tension explodes. Industry best practice and OSHA guidance recommend a 30° minimum. Q18. Rated capacity on a load chart is "gross." What does that mean for rigging? A. Includes all rigging B. Excludes rigging — operator must deduct C. Includes only the hook block D. Includes only standard manufacturer rigging. Answer: B. Gross = before deductions. Q19. Hook block 1,500 lb, headache ball 350 lb, 4-part sling 480 lb, two shackles 60 lb. Chart capacity 40,000 lb. Net capacity? A. 38,000 B. 37,610 C. 36,500 D. 35,200. Answer: B. 40,000 − 1,500 − 350 − 480 − 60 = 37,610 lb. Q20. D/d ratio refers to: A. Drum to drift B. Sheave/drum diameter to wire rope diameter C. Distance to deduction D. Diagonal to drop. Answer: B. Most manufacturers require D/d ≥ 18:1 for full WLL. Q21. A wire rope sling has a vertical WLL of 12,000 lb. What is its WLL in a 2-leg bridle hitch at 60° from horizontal? A. 6,000 B. 12,000 C. 20,784 D. 24,000. Answer: C. 2 × 12,000 × sin(60°) = 20,784 lb total system capacity. Q22. OSHA 1926.1419 requires: A. Hand or voice signals — never both at once B. Both at all times C. Voice only at night D. No signals if operator can see load. Answer: A. The signal person uses one method per lift.
Section D — Power Lines, Inspections, and Site Conditions (Q23–Q30)
Q23. OSHA 1926.1408 minimum clearance from energized power lines up to 350 kV (operating near, not over) is: A. 10 ft B. 15 ft C. 20 ft D. 50 ft. Answer: C. 20 ft minimum without a documented clearance plan. Q24. Pre-shift inspection of wire rope must check for broken wires. Removal-from-service criterion: A. Any broken wire B. 6+ randomly distributed in one rope lay, or 3+ in one strand C. 10+ per foot D. Only after annual inspection. Answer: B. Per OSHA 1926.1413 and ASME B30. Q25. Annual crane inspection must be performed by: A. Operator B. Foreman C. Qualified person D. Anyone trained. Answer: C. A qualified person — documented and signed. Q26. Wind speed limit for crane operation is set by: A. Federal law (25 mph) B. Manufacturer's load chart / operator's manual C. Site superintendent D. ANSI default 35 mph. Answer: B. Always the manufacturer. Q27. Outrigger pads (cribbing) should provide a bearing area such that: A. Ground pressure ≤ allowable soil bearing capacity B. Pad ≥ 4 ft × 4 ft C. Pad covers the whole outrigger float D. Pad is steel only. Answer: A. Pad area ≥ outrigger reaction load / soil bearing capacity. A 50,000 lb outrigger on 2,000 psf soil needs at least 25 sq ft of pad. Q28. Operator certification under OSHA 29 CFR 1926.1427 is required for cranes with rated capacity above: A. 1,000 lb B. 2,000 lb C. 5,000 lb D. 10,000 lb. Answer: B. >2,000 lb capacity in construction triggers the requirement. Q29. NCCCO certification is valid for: A. 1 year B. 3 years C. 5 years D. Lifetime. Answer: C. Five years, then recertify with both written and practical exams. Q30. A crane is rated 45,000 lb at the planned configuration. The load is 38,000 lb. Total rigging is 2,500 lb. Is the lift permissible? A. No — over capacity B. No — too close to limit C. Yes — net load 40,500 lb < 45,000 lb rated D. Yes — but only as a critical lift. Answer: C. 38,000 + 2,500 = 40,500 lb, which is < 45,000 lb.
How to Score Yourself
27–30 correct (90%+): You're exam-ready on load charts. Move on to signals and inspections. 24–26 correct (80–89%): Solid. Drill the questions you missed, then take a fresh practice set. 20–23 correct (66–76%): Borderline. You'd likely pass this section but with no margin. Study the explanations again before re-testing. Fewer than 20 correct: You need 1–2 more weeks on chart math before scheduling your exam. Don't gamble the $200+ exam fee. The full bank of 1,000+ NCCCO-format questions inside Crane Prep is what most operators use for daily practice — see /questions/crane.
Common Mistakes That Tank Otherwise Strong Candidates
1. Using boom length instead of load radius. They're never the same. Radius is horizontal. 2. Forgetting rigging deductions. The chart's number is gross, not net. Hook block alone can be 1,500–3,000 lb on bigger machines. 3. Reading the wrong outrigger column. Mid-extended is not fully extended. Re-check the column header on every question. 4. Ignoring footnotes and asterisks. Almost every miss-by-a-little wrong answer has a footnote pointing at it. 5. Confusing structural vs. stability ratings. When two numbers exist, take the lower. Bold (stability) and italic (structural) — always use the worse of the two. 6. Treating "on rubber" like "on outriggers." Different column, different reality, often less than 30% of outrigger capacity.
A 4-Week Study Plan to Lock This In
Week 1 — Fundamentals. Memorize the five chart numbers, the net-capacity formula, and the trig (cos 30 / 45 / 60). Read OSHA 1926 Subpart CC end-to-end once. Reference: /study/crane. Week 2 — Chart drills. 20 chart problems per day across at least 3 different manufacturer formats (Grove, Manitowoc, Liebherr). Time each one. Week 3 — Rigging math. Sling-tension formulas, D/d ratios, WLL conversions. Mix in pre-shift inspection criteria and signal recognition. Week 4 — Full timed mock exams. 90 questions, 2.5 hours, no notes. Two full mocks, minimum. If you score 80%+ on both, schedule your test. The Crane Prep app's timed mode mirrors the actual NCCCO exam interface — same question count, same time limit, same proportional topic mix. See /apps/crane.
Bottom Line and Next Step
If you can read a load chart accurately in under 60 seconds and you've memorized the rigging deduction list, you'll pass the NCCCO Core exam. Drill these 30 questions until you can explain each one without looking at the answer. Then move on to your specialty exam. Download the Crane Prep app for 1,000+ NCCCO-format questions, an interactive load chart calculator, and full offline study at the yard. Try free NCCCO practice questions on VoltExam — no signup, no card required. Start at /apps/crane or jump straight into /questions/crane.
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