This guide covers the CCO Telescopic Boom Crane — Swing Cab (TLL) certification route end to end: the shared Mobile Crane Core written examination of 95 questions in 90 minutes, the TLL specialty written examination of 28 questions in 60 minutes, both domain outlines, the swing-cab machine family from rough-terrain cranes to multi-axle all-terrains, the counterweight and pick-and-carry work its charts test, the practical examination outside this program, and the five-year certification, as published in CCO’s Mobile Crane Operator Candidate Handbook.
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The certification 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 |
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.
Reading the verified facts
Every fact in the table above is stated as CCO states it in the CCO Mobile Crane Operator Candidate Handbook (REV 06/24) and the CCO fee schedule, because this designation’s candidates are ill-served by the approximations that circulate about it. Three points in the table deserve emphasis before the detail. First, the written examinations named there are the whole of what this guide – and the PassProfessor program it accompanies – prepares candidates for: CCO certification for this designation also includes a practical examination, and no page of this guide offers preparation for it. Second, the passing position: CCO does not publish a percentage passing standard for these written examinations, and this guide quotes none, because a converted or invented percentage would misstate the standard candidates are actually held to. Third, the fee lines are CCO’s charges for CCO’s examinations, labeled as third-party fees wherever they appear; they are not prices for anything PassProfessor sells.
The certification route, step by step
Step 1 — Confirm the designation fits your machine
TLL covers telescopic boom cranes whose operator station rotates with the upper works – rough-terrain, all-terrain, and swing-cab truck cranes, including the walk-around and platform configurations the handbook reads into the swing cab family. If your station stays fixed while the boom swings, your designation is TSS. Confirm eligibility as well: at least 18, compliance with the CCO Substance Abuse Policy, and agreement to the Code of Ethics.
Step 2 — Apply to CCO and schedule the written examinations
Apply through CCO and schedule the Mobile Crane Core examination and the TLL specialty examination. CCO’s written examination fees are $140 for the Core and $80 for the specialty, per the CCO fee schedule effective January 1, 2024 – CCO’s fees for its own examinations. Either written examination may be taken first, but schedule with the 12-month window in view: written and practical elements must all be passed within 12 months of each other.
Step 3 — Sit the two written examinations
The Core is 95 questions in 90 minutes, no calculator permitted, weighted across site, operations, technical knowledge, and load charts. The specialty is 28 questions in 60 minutes, calculator permitted, with manufacturers’ load charts its heaviest domain. On every chart item, write the configuration down – counterweight, outrigger state, on outriggers or on rubber, quadrant – before reading a capacity. CCO publishes no percentage passing standard for either examination.
Step 4 — Complete the practical examination and hold the certification
The written examinations do not certify: a CCO practical examination on a swing cab telescopic crane must also be passed inside the 12-month window. This program provides no preparation for it. Certification then runs five years, with recertification conducted under the candidate handbook current at renewal.
The examination outline in full
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.
The guide plans a site for an all-terrain crane in worked detail – carrier position, outrigger spread, counterweight staging, tail-swing clearance – and then re-plans it as the site fights back.
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.
The guide runs the domain as a job day with interruptions – a signal failure, a wind rise, a load that arrives heavier than its ticket – because operations items test judgement under changed conditions.
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.
The guide teaches each system by its failure signature: what the operator sees, hears, and reads on the instruments as the failure approaches, and what the handbook expects the operator to do about 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.
The guide’s chart teaching is anatomical – notes, warnings, and conditions before tables – and every worked example states its configuration in writing before a single capacity is read.
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.
The guide follows one machine from road arrival to first pick, listing every site decision in the order the crew meets it and the chart consequence attached to each.
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.
The guide narrates a turnaround pick sequence – configurations changing across the day – and marks the points at which the governing chart changes with them.
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.
The guide is organised as the machine is organised – carrier, upper works, boom, aids – so that revision mirrors the pre-operation inspection the operator performs daily.
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.
The guide works chart problems in full – configuration stated, deductions in order, interpolation shown, decision defended – including problems whose correct conclusion is that the pick, as configured, cannot be made.
The sitting itself: format, scoring, and retakes
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.
Carry the admission documents CCO issues and identification matching the application name. The Core sitting rewards pace – about a question a minute, nothing left blank. The specialty sitting rewards method: its chart items come from chart books with several configurations per page, and the examiners expect the candidate to establish the configuration before the capacity. Use the permitted calculator for the arithmetic and your written configuration note for everything else; most specialty errors in practice sessions are configuration errors wearing arithmetic’s clothes.
What this examination is for
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 designation in its family
The swing cab designation is the mobile family’s heavy end, and its position in the suite explains its examination’s flavour. Rough-terrain and all-terrain cranes are the machines other designations’ operators graduate to: larger charts, assembled counterweight, carrier systems of real complexity, and pick lists that run for weeks on a single site. Within the family, TLL’s sibling relations are instructive. It shares the Core with every mobile designation, so a TSS or lattice operator adding TLL brings the general craft with them; what they cannot bring is the chart book, because the swing cab books are the family’s most configuration-dense and their specialty examination is written against that density. The designation also anchors the family’s top end in another sense: the lattice crawler world overlaps it in capacity and in crew structure, and operators who work both hold both specialties, each earned through its own written and practical examinations under the shared Core. Candidates planning a career rather than a credential should read TLL not as a terminal qualification but as the mobile program’s centre of gravity, from which the fixed-cab specialty below and the lattice specialties beside it are most naturally added.
Preparation errors this guide is written to prevent
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.
After the examination
Passing both written examinations opens the 12-month window rather than closing the file: the practical examination must be passed within it. A written examination not passed is retaken under CCO’s reapplication rules. Once certification issues, it runs five years and travels with the operator between employers; recertification, including its experience provisions, follows the handbook current when the certification comes due.
Working under the certification
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.
The swing cab credential’s five-year term typically spans the most changeable years of an operator’s career: new carriers, new chart books, new counterweight systems, and sites whose rules tighten across the term. Two habits protect the credential’s value through that change. The first is chart book discipline as a standing practice – every unfamiliar machine begins with its book, its configurations, and its notes, before its first pick, because the examination’s core skill, configuration-first reading, is also the career’s core safety skill on machines that differ in exactly the details examinations test. The second is renewal realism: recertification is governed by the handbook current when the term ends, including its experience provisions, and operators who track their operating experience across the term arrive at renewal with options that operators reconstructing five years from memory do not. The designation also anchors a family’s worth of additions – fixed cab below it, lattice beside it – each under the same Core, and the operator who plans those additions early can sequence applications and practical examinations inside shared windows rather than serial ones.
A preparation plan that respects the outline
Build the plan on the outline’s weights, not on habit. Open with the domain the outline weights most heavily for this designation, because it is where the sitting is decided; then work the remaining domains in outline order, keeping a running record, domain by domain, of where practice performance is thin. Reserve complete timed sittings – at the examination’s real question count and time limit – for the final stage of the plan, and take them under examination conditions: no pauses, no references, scratch paper only for configuration notes. Spend the middle weeks of the plan inside chart books, not summaries of them: work counterweight-variant problems until identifying the governing configuration is automatic, then work on-rubber problems, where the capacities drop and the notes multiply. Close the plan with timed specialty sittings that mix configurations without warning, because the real examination will not announce which machine each item describes. The companion PassProfessor program page describes the preparation program itself, which is in the works; this guide stands on its own as the route and outline reference for the designation.
Study method for this designation is configuration triage under time pressure. Build practice sets that deliberately withhold the configuration cues from the question’s opening line – bury the counterweight state mid-sentence, let the quadrant be implied by the pick’s position – and train the reflex of extracting and writing the full configuration before reading further. Work the on-rubber material as its own block: it is a minority of most chart books and a majority of the traps, because its numbers look reassuringly similar to the on-outrigger figures beside them. For operations, rehearse the turnaround day: a sequence of picks across changing configurations, narrated aloud with the governing chart named at each change. The specialty examination is short, dense, and configuration-led; the operator who can state, for any described machine, exactly which chart governs it, has done most of the examination’s work before the arithmetic begins.
Frequently asked questions
Which machines are swing cab machines?
Those whose operator station rotates with the upper works: rough-terrain cranes, all-terrain cranes, and swing-cab truck cranes, together with the walk-around and platform configurations the handbook includes in the family. The operator faces the direction of the boom through the swing, which changes sight lines, signalling, and the way quadrants are worked.
How are the written examinations timed?
The Core allows 90 minutes for 95 questions, calculator not permitted. The TLL specialty allows 60 minutes for 28 questions, calculator permitted. Per question the specialty is the slower sitting, because its chart items are configurational problems, not recall items.
What should dominate specialty preparation?
Manufacturers’ load charts, at roughly 35% of the specialty – specifically the configuration discipline the charts demand: counterweight fitted, outrigger state, on outriggers versus on rubber, quadrant, and deductions, established in writing before any capacity is read.
What is the tail swing, and why does the site domain care?
The radius swept by the counterweight and rear of the upper works as the crane rotates – often the part of the machine nearest to structures, materials, and people standing behind the operator’s view. Site items examine clearance, barricading, and the spotter arrangements the tail swing requires.
What does on-rubber capacity mean?
Capacity with the crane standing on its tyres rather than on outriggers, read from its own table under its own conditions – typically lower, quadrant-sensitive, and conditioned by tyre state and surface. Confusing an on-rubber figure with an on-outrigger figure is one of the classic chart errors the specialty is designed to catch.
Do I need operating experience to sit the written examinations?
CCO’s published eligibility floor is age of at least 18, compliance with the Substance Abuse Policy, and agreement to the Code of Ethics. Experience is not a stated written-examination prerequisite, though the practical examination and the work itself are experience in action.
What if I pass the written examinations and miss the practical window?
Certification requires all elements passed within 12 months of each other. An element outside the window is retaken under the current handbook’s rules; the window, not the individual pass, is what candidates must manage.
How does this designation sit with OSHA’s standard?
The handbook operates in the frame of OSHA’s cranes-in-construction standard, 29 CFR 1926 Subpart CC, which requires certification for operators of covered equipment and sets the power line and assembly rules the Core examines. The governing texts are CCO’s and OSHA’s; this guide is preparation, not legal advice.
Why is no calculator allowed on the Core?
Its arithmetic is deliberately light; it examines knowledge and judgement at pace. The mobile program’s computational weight is placed in the specialty examinations, where a calculator is permitted and where the chart problems justify it.
What is boom sequencing, in technical terms?
The designed order in which telescopic sections extend and retract – by pins, cables, or a single-cylinder system – which governs the boom’s strength at a given length and therefore the chart. The specialty’s technical domain examines the systems fitted to this family and their inspection points.
How do riggers and signal persons figure in this examination?
Through the operations domains: standard hand signals, voice signal elements, who may give a stop signal, and the operator’s duties when signals are lost or conflict. Swing cab work is crew work, and the examination treats communication failure as an operational event, not an inconvenience.
I hold TLL and want TSS as well. What carries?
The Core. An added mobile specialty is its specialty written examination and its practical examination, under the current handbook’s rules – verify the details with CCO at application, since designation rules are CCO’s.
Does this guide prepare me for the practical examination?
No. The guide covers the written examinations, and says so wherever the practical is mentioned. The practical is a hands-on assessment; preparation for it is supervised operating time on swing cab machines.
What sources does this guide rest on?
CCO’s Mobile Crane Operator Candidate Handbook (REV 06/24) and the CCO fee schedule effective January 1, 2024, listed in this file’s INTERNAL section. Facts that could not be verified against those sources were omitted rather than approximated.