The CCO Telescopic Boom Crane — Swing Cab (TLL) designation certifies operators of telescopic boom cranes whose operator station is mounted on the rotating upper works and swings with the boom: rough-terrain, all-terrain, and swing-cab truck cranes. Certification requires the Mobile Crane Core written examination of 95 questions in 90 minutes and the TLL specialty written examination of 28 questions in 60 minutes, plus a practical examination, with certification valid five years. This program covers the written examinations only.
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What this designation certifies
On a swing cab crane the operator rides the machine’s rotation: the cab is mounted on the upper works and turns with the boom, so the operator faces the load through the whole swing. Rough-terrain cranes on construction sites, all-terrain cranes travelling between them on multi-axle carriers, and swing-cab truck cranes all share the arrangement, and it is the arrangement of the larger, heavier end of the telescopic world – machines assembled for the day’s work with counterweight packages, outrigger spreads, and sometimes auxiliary equipment that each carry their own charts. The TLL designation examines that family through the mobile program’s standard architecture: the shared Core written examination, a TLL specialty written examination, and a practical examination. This program prepares candidates for the written examinations only.
What separates the swing cab family is not the cab alone but everything that travels with it. These are the telescopic cranes that pick and carry on rubber under their manufacturers’ rules, that work on outriggers, on tyres, and in some configurations partially extended, and whose capacity is a function of counterweight fitted as much as of boom length and radius. The operator assembles the machine’s configuration – counterweight, outrigger spread, boom sequence – and then lives inside the chart that configuration produces. The examination reflects that: its specialty chart work tests whether the candidate can keep the configuration straight across a long table of variants, because on site the cost of confusing one configuration’s capacity with another’s is not a lost mark.
The examination at a glance
| Item | Verified position |
|---|---|
| Certification | CCO Telescopic Boom Crane, Swing Cab (TLL) — a specialty designation under the CCO Mobile Crane Operator program |
| Written examinations | Two: the Mobile Crane Core Examination and the Telescopic Boom — Swing Cab (TLL) specialty examination |
| Core examination | 95 multiple-choice questions, 90 minutes; calculator use is not permitted on the Core |
| Specialty examination | 28 multiple-choice questions, 60 minutes; calculator use is permitted, and the manufacturer load chart questions sit inside it |
| Passing standard | CCO does not publish a percentage passing standard for these written examinations; results are determined under CCO’s criterion-referenced scoring |
| Eligibility | At least 18 years of age; compliance with the CCO Substance Abuse Policy; agreement to the CCO Code of Ethics |
| Practical examination | A separate CCO practical examination on a swing cab telescopic boom crane is also required for certification. This PassProfessor program does not cover it |
| Certification period | Five years; the written and practical examinations must both be passed within 12 months of each other |
| Written examination fee | CCO fee: Core $140; TLL specialty $80 (third-party fees per the CCO fee schedule effective January 1, 2024) |
| Administrator | CCO — the National Commission for the Certification of Crane Operators (NCCCO). PassProfessor is independent and is not affiliated with CCO or OSHA |
What the written examination covers
The Core outline is shared with every mobile designation – site, operations, technical knowledge, and load charts in roughly equal weight – and the specialty then examines the swing cab machine in its own right. Specialty site work concentrates on positioning a larger machine: carrier placement, outrigger spread on real ground, counterweight assembly areas, and the swing clearance a rotating upper works with a counterweight tail demands. Specialty operations carries pick-and-carry discipline and multi-configuration work. And the specialty’s heaviest domain is manufacturers’ load charts, where the all-terrain and rough-terrain chart books – with their counterweight variants and on-rubber tables – are the most complex documents in the telescopic family.
Core — Site — ~22%
The Core’s site domain examines the ground and the space a mobile crane works in: bearing capacity and matting under outriggers, levelling within the manufacturer’s tolerance, access and positioning, swing clearance and barricading, and overhead hazards led by power lines. For swing cab machines the tail swing of a counterweighted upper works is part of the site problem, and the domain examines whether the candidate plans for the whole rotating machine, not only the boom.
Core — Operations — ~28%
Operations, the Core’s largest domain, is the examined craft of running a mobile crane: inspections, setup, signalling by hand and voice, power line rules, operating through the pick, travelling and pick-and-carry where permitted, and shutdown and securing. Its items are decisions, and its standard is the handbook’s and the manufacturer’s, not local custom.
Core — Technical Knowledge — ~23%
The Core’s technical domain covers the systems every mobile operator must understand: wire rope and its inspection, telescopic boom construction, hydraulics, outriggers, carrier and upper works, and the operator aids – rated capacity limiters and anti-two-block devices – including their limits. The physics of leverage, stability, and centre of gravity sits underneath it.
Core — Load Charts — ~27%
The Core chart domain teaches the grammar all mobile charts share: radius, boom length, gross and net capacity, deduction order, quadrants, the stability-versus-structure division on the chart, and interpolation. It is deliberately manufacturer-neutral; the specialty examination then examines the dialect, and candidates who arrive at the specialty without the grammar read its charts slowly and wrongly.
Specialty — Site — ~23%
Specialty site work applies the Core’s site judgement to the swing cab machine: positioning a multi-axle carrier, spreading outriggers to the configuration the chart assumes on ground that must be made to bear it, staging counterweight for assembly, and clearing the tail swing. It examines the setup of a machine that is assembled on site, piece by piece, before its first pick.
Specialty — Operations — ~23%
The specialty operations domain covers working the swing cab crane: swinging with the load from a rotating station, pick-and-carry operations under the manufacturer’s on-rubber rules where the handbook examines them, multi-configuration work across a pick list, communication with riggers and signal persons, and the machine’s abnormal-event procedures.
Specialty — Technical Knowledge — ~19%
Specialty technical knowledge examines the swing cab family’s own systems: counterweight systems and their configurations, carrier steering and suspension, outrigger monitoring, boom sequencing and synchronisation, and the inspection regime for machines that travel by road between sites and work hard at each one.
Specialty — Manufacturers’ Load Charts — ~35%
The specialty’s heaviest domain and its centre of gravity: the chart books of rough-terrain, all-terrain, and swing-cab truck cranes, with their counterweight variants, outrigger states, on-rubber tables, quadrant divisions, jib and extension configurations, and dense condition notes. The examination tests whether the candidate can find the one governing capacity for a fully described machine among many similar numbers.
Who this certification serves
Swing cab operators staff the heavy mobile end of construction and industrial work: rough-terrain cranes placing steel and precast on site for weeks at a time, all-terrain cranes arriving by road for refinery turnarounds, petrochemical maintenance, and plant shutdowns where the pick list is long and the configurations change by the hour. It is crew work – riggers, signal persons, and often an assembly crew for counterweight and attachments – and the operator’s certification is the portable evidence an employer or site owner reads as examined competence on exactly these machines. The handbook’s framework is OSHA’s crane standard for construction, which the specialty’s content repeatedly invokes.
The written route, in order
CCO permits the two written examinations in either order: the Core, 95 questions in 90 minutes with no calculator, and the TLL specialty, 28 questions in 60 minutes with a calculator permitted for its chart computation. Certification completes only when the practical examination on a swing cab telescopic crane has also been passed, with every element passed within 12 months of each other, and then runs five years. Results are issued under CCO’s criterion-referenced scoring; CCO publishes no percentage passing standard for either written examination, and candidates should treat any percentage quoted by anyone else as invented.
What makes this examination demanding
The specialty examination compresses: 28 questions, more than a third of them manufacturer chart work, drawn from chart books that offer the same pick at several capacities depending on counterweight, outrigger state, and whether the machine is on outriggers or on rubber. The demanding skill is configuration discipline under time pressure – establishing, for each item, exactly which machine the question describes before touching the table. Candidates who read the capacity first and the configuration second fail items they know how to work; the examination is built to find that habit.
The credential at work
A certified swing cab operator’s week is configuration management: counterweight on and off as the pick list changes, outriggers spread to the marks the chart assumes, boom sequenced for the longest pick of the day, and a running account of which chart governs the machine as it currently stands. The written examination’s habits – configure first, deduct in order, respect the notes – are the habits that keep that week inside the charts. The credential is also the mobile program’s common second specialty: operators who began on fixed-cab machines add TLL, and operators who began here add TSS, each under the same Core.
What the PassProfessor program will cover
Built domain by domain on the outline CCO publishes. The CCO Mobile Crane Operator Candidate Handbook (REV 06/24) prints the written examination outline for the CCO Telescopic Boom Crane — Swing Cab specialty examination, and the program in the works follows that outline as its table of contents – its domains, in its proportions. Practice items are original, written for this program from the outline and the manufacturer’s chart discipline it tests; they are not examination items, not recalled items, and not another company’s items reworded.
A swing-cab telescopic crane operator’s exam, prepared as a swing-cab telescopic crane operator’s exam. The candidate this program serves runs rough-terrain, all-terrain, and truck cranes whose cab rides the rotating upper works, turning with every swing the boom makes. The scenario work is therefore written from that seat: a counterweight package assembled for the day’s heaviest pick, a carrier positioned for a pick-and-carry move, a chart whose capacity changes with the slew the operator is about to make. That orientation runs through the chart material as well as the operations material.
Domain-level diagnostics. Results are organised by outline domain rather than as a single score, because a single score cannot tell a candidate whether the next study hour belongs in load-chart configuration work or in the load charts. The outline’s heaviest domains get the deepest practice sets, in the outline’s own proportions.
Written examination only, with the boundary kept clear. PassProfessor preparation covers the written examination only. It does not cover the practical examination and it is not hands-on training. PassProfessor is an independent preparation provider, not affiliated with CCO (the National Commission for the Certification of Crane Operators, NCCCO) or with OSHA; CCO alone administers the examinations and issues the certification.
Tell me when enrollment opens. The CCO Telescopic Boom Crane, Swing Cab (TLL) program is in the works and enrollment is not yet open. Leave an email address and PassProfessor will write to you when the program is ready — and only about this program. No date is promised, because the program will open when it meets the standard described above, not before.
Frequently asked questions
Does this program cover the CCO practical examination?
No. It prepares candidates for the written examinations – the Mobile Crane Core and the TLL specialty. Certification also requires a practical examination on a swing cab telescopic boom crane, for which this program offers no preparation and no hands-on component.
What is the difference between TLL and TSS?
Where the operator sits. A TLL operator station is mounted on the rotating upper works and swings with the boom; a TSS station is fixed and does not rotate. Rough-terrain and all-terrain cranes are swing cab machines; boom trucks and carry decks are fixed cab. The designations share the Core examination and differ in specialty and practical examinations.
How many written examinations does TLL require?
Two: the shared Mobile Crane Core examination and the TLL specialty examination, in either order. With the practical examination, all elements must be passed within 12 months of each other.
Why does the specialty lean so heavily on load charts?
Because swing cab chart books are the most configuration-dense in the telescopic family: counterweight variants, outrigger states, and on-rubber tables multiply the capacities on offer for any pick. At roughly 35% of the specialty examination, manufacturers’ load charts are its heaviest domain, and they test configuration discipline as much as arithmetic.
How long is TLL certification valid?
Five years, under the current CCO Mobile Crane Operator Candidate Handbook, which also sets recertification requirements.
What does CCO charge for these written examinations?
Per the CCO fee schedule effective January 1, 2024: $140 for the Core written examination and $80 for the TLL specialty written examination. These are CCO’s third-party fees for its own examinations.
Is there a percentage score I must reach to pass?
No percentage passing standard is published by CCO for these examinations; results are determined under CCO’s criterion-referenced scoring. Treat any percentage quoted by a third party as invented.
Is PassProfessor affiliated with CCO?
No. PassProfessor is an independent preparation provider, not affiliated with CCO (the National Commission for the Certification of Crane Operators, NCCCO) or OSHA. The program confers no certification and nothing about it is reported to CCO.
Does pick-and-carry work appear on the examination?
Pick-and-carry is part of the working life of rough-terrain cranes and sits within the operations and chart material the handbook outlines for this family – always under the manufacturer’s stated conditions, which the chart notes govern. The program teaches it as the handbook and the charts frame it, not as a general permission.
Can I add TLL if I already hold TSS?
The Core examination is shared across mobile designations, so an additional specialty is pursued through its own written and practical examinations under the current handbook’s rules – confirm the current position with CCO when you apply.