Crane load chart practice: 60 problems, every step worked
On each CCO telescopic boom specialty exam about 35% of the questions are on load charts. This drill gives you 60 load chart problems, every step worked.
- Every step worked
- Fictional charts, each with notes
- Score by problem type
- Checked 23 October 2026
The charts are fictional, made for practice; on the exam you use the chart CCO gives you.
- 60 original load chart problems
- Gross, net, radius, parts of line, jib
- Fictional charts with their own notes
- Three timed rounds at the specialty pace
The drill
Double-checked questions Real exam pattern Free sample · 3 problems
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Full tests 3 tests
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- 60 original load chart problems
- Gross, net, radius, parts of line, jib
- Fictional charts with their own notes
- Three timed rounds at the specialty pace
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Every test: instant score, answer review and a breakdown of topics to work on
Round 1
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Round 2
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Round 3
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The practice crane's charts
Every problem uses these fictional charts, shown again with each question. Pick a boom length and a radius to see which cell the chart notes send you to.
PX-40 practice crane (fictional): telescopic boom, swing cab, 35 to 105 ft main boom. For practice only: not a real crane's chart.
Use the 75 ft column at 40 ft: gross capacity 24,050 lb (stability). Not listed exactly, so note 4 sends you to the next longer boom and the next larger radius. Now take off the block, rigging and any jib deduction.
| Radius (ft) | 35 ft | 45 ft | 55 ft | 65 ft | 75 ft | 85 ft | 95 ft | 105 ft |
|---|---|---|---|---|---|---|---|---|
| 10 | 80,000* (78°) | — | — | — | — | — | — | — |
| 12 | 71,870 (75°) | 64,610* (78°) | — | — | — | — | — | — |
| 15 | 60,520 (70°) | 59,750* (75°) | 50,380* (77°) | 43,710* (79°) | — | — | — | — |
| 20 | 47,910 (61°) | 47,650 (68°) | 45,560* (72°) | 39,520* (75°) | 35,000* (77°) | 31,460* (78°) | 28,630* (80°) | — |
| 25 | 39,650 (51°) | 39,330 (61°) | 39,000 (66°) | 36,550* (70°) | 32,370* (73°) | 29,100* (75°) | 26,470* (77°) | 24,320* (78°) |
| 30 | 33,820 (40°) | 33,430 (53°) | 33,040 (61°) | 32,650 (65°) | 30,370* (69°) | 27,300* (71°) | 24,840* (73°) | 22,810* (75°) |
| 35 | 29,480 (24°) | 29,030 (45°) | 28,570 (54°) | 28,120 (61°) | 27,660 (65°) | 25,870* (68°) | 23,530* (70°) | 21,610* (72°) |
| 40 | — | 25,610 (35°) | 25,090 (48°) | 24,570 (55°) | 24,050 (60°) | 23,530 (64°) | 22,460* (67°) | 20,630* (69°) |
| 45 | — | 22,880 (21°) | 22,290 (40°) | 21,710 (50°) | 21,120 (56°) | 20,540 (60°) | 19,950 (64°) | 19,370 (66°) |
| 50 | — | — | 19,990 (31°) | 19,340 (44°) | 18,690 (51°) | 18,040 (56°) | 17,390 (60°) | 16,740 (63°) |
| 55 | — | — | 18,060 (19°) | 17,340 (37°) | 16,630 (46°) | 15,910 (52°) | 15,200 (57°) | 14,480 (60°) |
| 60 | — | — | — | 15,620 (29°) | 14,840 (41°) | 14,060 (48°) | 13,280 (53°) | 12,500 (57°) |
| 70 | — | — | — | — | 11,900 (27°) | 10,990 (38°) | 10,080 (45°) | 9,170 (50°) |
| 80 | — | — | — | — | — | 8,490 (25°) | 7,450 (36°) | 6,410 (43°) |
| 90 | — | — | — | — | — | — | 5,210 (24°) | 4,040 (34°) |
Jib chart, notes and deductions
| Main boom angle | 0° offset | 15° offset | 30° offset |
|---|---|---|---|
| 78° | 7,800 | 6,250 | 4,900 |
| 75° | 7,350 | 5,950 | 4,700 |
| 70° | 6,600 | 5,450 | 4,350 |
| 65° | 5,850 | 4,900 | 3,950 |
| 60° | 5,000 | 4,300 | 3,500 |
| 55° | 4,150 | 3,650 | 3,000 |
| 50° | 3,350 | 2,950 | 2,450 |
| 45° | 2,600 | 2,300 | 1,900 |
| 40° | 1,950 | 1,700 | 1,400 |
- All capacities are GROSS capacities in pounds for a crane set level on a firm supporting surface, full counterweight, operating over 360 degrees. Chart A: outriggers fully extended (tires clear of the ground). Chart B: outriggers at the mid-extended position.
- To find the NET load that may be lifted, deduct from the gross capacity the weight of the hook block or overhaul ball, all slings and rigging, and any deduction listed for the jib or the auxiliary boom head.
- Radius is the horizontal distance from the axis of rotation to the center of the vertical hoist line with the load suspended. Boom angles in brackets are for reference only: always use the loaded radius.
- For a radius between two listed radii, use the capacity for the next LARGER listed radius. For a boom length between two listed lengths, use the capacity for the next LONGER listed boom length. A blank cell means no lift is allowed in that configuration.
- Capacities marked * are limited by the strength of the crane structure; all others are limited by stability.
- Hoist line pull: at most 7,700 lb per part of line. Parts of line needed = total suspended weight (load + rigging + hook block or overhaul ball) divided by 7,700, rounded UP. Unless a problem says otherwise, the main hook block is reeved with enough parts of line for the load. The overhaul ball is single part only, so on the ball the load + rigging + ball may not exceed one part's line pull, whatever the chart allows.
- Jib chart: capacities are for the 32 ft jib on the 105 ft main boom, by main boom angle. For a boom angle between two listed angles, use the capacity for the next LOWER listed angle. Do not lift on the jib below 40 degrees. Deduct the overhaul ball and rigging; if the main hook block stays reeved on the main boom head, deduct its weight as well.
- Main hook block (5 sheaves): 1,150 lb, up to 10 parts of line
- Overhaul ball: 420 lb, up to 1 part of line
- Jib stowed on the side of the boom (deduct from main boom capacities): 1,850 lb
- Jib erected but not used, lifting on the main boom (deduct from main boom capacities): 4,600 lb
- Auxiliary boom head installed (deduct from main boom capacities): 160 lb
- Permitted line pull: 7,700 lb per part of line
What it covers
On each CCO telescopic boom specialty exam (28 questions in 60 minutes, calculator allowed) about 35% of the questions are on load charts. This drill gives you 60 load chart problems on a fictional practice crane: gross and net capacity, values between chart lines, deductions, maximum radius, parts of line, outrigger position and jib capacity. Three rounds of 20 at the specialty exam's pace, every answer worked step by step. Start with the 3 free problems.
- Gross capacity and values between chart lines
- Net capacity: hook block, overhaul ball, rigging, stowed and erected jib
- Is the lift within capacity, and by how much
- Maximum radius for a load
- Parts of line from the permitted line pull
- Fully and mid-extended outriggers
- Jib capacity by boom angle and offset
The charts are fictional, made for practice, each with its own notes. On the exam you use the chart CCO gives you; on the job, the chart and procedures that apply to your crane, following its own notes.
The CCO exams this prepares you for
To be certified as a Mobile Crane Operator, CCO asks you to pass the Core written exam, at least one specialty written exam (Lattice Boom LAT, Telescopic Boom Swing Cab TLL or Telescopic Boom Fixed Cab TSS) and the matching practical exam, within 12 months of passing the first. Read CCO's own Mobile Crane Operator Candidate Handbook for the exam outlines; for how the load chart questions work, see our guide to crane load chart practice.
Before you buy
What do I get?
Sixty load chart problems in three rounds of 20, each with a 43-minute clock (the specialty exam pace of 28 questions in 60 minutes), in the full test player. When you submit, you see every answer worked step by step. Retake it as often as you like.
How were the answers checked?
Every answer and every wrong option is calculated by a program from the chart, and the calculation itself is tested. Every problem was then answered by three independent reviewers who did not see our answer key, and went in only when all three matched ours with no objection raised.
Is this the current format?
It follows the CCO Mobile Crane Operator Candidate Handbook (revision 01/25): the Core exam has 95 questions in 90 minutes without a calculator; each specialty exam has 28 questions in 60 minutes with a calculator. Format last checked 23 October 2026; check CCO's current handbook before your test day.
How do I pay and get access?
One payment by card (or PayPal where offered), handled by our payment provider. In the United States the price is charged in US dollars; in other countries in your own currency where we support it, otherwise in Indian rupees with the local figure shown as an estimate. Access opens on this device straight after payment. Sign in afterwards to keep it on your account. Purchase policy.
Also for the NCCCO written exams
- Core practice exam95 questions in 90 minutes
- Both togetherCore practice exam + load chart drill
Independent practice material. Not written or endorsed by the NCCCO (CCO). These are original questions on fictional practice charts, not CCO exam questions or real crane charts. The format is stated as CCO's handbook gave it on 23 October 2026; CCO's current handbook is the authority.
Disclaimer
Are these real CCO exam questions or real load charts? No. Every question is original, and the load charts are fictional, made for practice: they are not any manufacturer's chart and not the chart CCO uses. What you practise carries over: reading a chart, applying its notes and taking off every deduction. On any real chart, follow its own notes.
Is it official? No. This is independent practice by ProSyllabus, not produced, endorsed or checked by the National Commission for the Certification of Crane Operators (NCCCO/CCO).