For crane operators taking the NCCCO written exams

NCCCO crane operator written exam prep, free to start

Walk into the NCCCO exam ready for the load chart

Practice the NCCCO Core exam. Add the lattice boom (LAT), telescopic swing cab (TLL) and telescopic fixed cab (TSS) specialties. The free 10-question check, weighted to Core, explains every answer.

  • No signup · No card
  • Every answer explained
  • Score by domain
  • Written to the NCCCO written exam outline
Ask Hook AI Explains your misses, answers from this course, and builds practice from your weak spots.Try it free: 3 asks on the free check, 10 more with your email. What Hook can do

The exam

Free NCCCO written check

Original practice questions written to NCCCO's published outline. Every answer comes with a full explanation.

Each check is weighted to that exam's published content outline, so your score breakdown matches what you will be tested on. The card has the full course and price: lessons, timed exams and a study plan, with Hook, your AI study assistant, built in.

Question 1 of 10 · free checkUntimed

Operations

Which action creates side loading on a crane boom?

Press A-D or 1-4 to choose an answer while this question is on screen.

Choose an answer to begin

Every course includes

  • Today's 10 with spaced review
  • Week-by-week plan to your exam date
  • Readiness by domain
  • Flashcards from your misses
  • Listen mode
  • Exam-week mode
  • Your progress on any device
  • Lifetime access

Hook, your AI study assistant, comes with the NCCCO written course: a week-by-week plan from your exam date and weak areas, step-by-step walk-throughs and a weak-spot quiz. Up to 40 messages a day.

More free practice

The Boom Angle app

Study for the NCCCO written anywhere you are

The Boom Angle app for iPhone and Android is built around your study buddy, with quick practice questions and your study plan. Boom Angle already works in your phone's browser today.

  • Today's questions, aimed at your weakest domain
  • Your week's plan, counting down to exam day
  • The same original questions and explanations as the site
  • Hook (AI), your Boom Angle study buddy, explains why the answer is right and the others are not: 3 free asks, 10 more with your email

Hook AI, your Boom Angle study buddy, is at the center of the app.

  • Tutor walkthroughs: Step-by-step help on any question you answered, at your pace.
  • My study plan: A day-by-day plan built from your weakest domains.
  • Weak-spot quiz: Quiz yourself on what you missed, with spaced review so it sticks.
Get notified when it's ready

NCCCO mobile crane operator certification has two parts: written exams and practical exams. On the written side you take the Core exam plus one specialty exam for each crane type you want certified. The specialties are Lattice Boom Cranes (LAT), Telescopic Boom Cranes, Swing Cab (TLL) and Telescopic Boom Cranes, Fixed Cab (TSS), per NCCCO's candidate handbook. Boom Angle covers the written exams. The practical is done on a crane with an examiner. Wondering whether you need a crane operator course first? The written exam does not require one.

What you can practice

Practice here follows the exam's own format and published outline, so what you practice is what you will sit.

  • Core: the free 10-question check and the question bank follow the Core written outline.
  • LAT, TLL and TSS: practice through the specialty outline they share, with simplified practice load charts for lattice and telescopic booms (not manufacturer charts). There is no separate bank for each specialty.
  • Not covered: Service Truck Cranes (STC), which has its own written exam (see the handbook's STC section, pp. 9-10), and the practical exams.

Going for rigger certification instead? See how NCCCO rigger certification works, Level I and Level II, plus Signalperson.

Every question is explained as you answer it in the free check.

Load charts are the biggest single topic

Load charts are about 27% of the Core exam and about 35% of each specialty exam, which since January 2023 uses a generic chart rather than one maker's. The LAT, TLL, TSS and STC comparison shows how the specialty and service truck crane written exams differ in length, calculator rule and load chart weight. The skill is reading a chart correctly: gross and net capacity, deductions, which radius applies, and what the chart's notes allow and forbid. Practice problems use fictional charts that are clearly labeled, so you build the steps without leaning on a manufacturer's chart.

The format in brief

  • Core: 95 questions in 90 minutes. No calculator is allowed.
  • Each specialty: 28 questions in 60 minutes. A calculator is allowed.
  • Where you test: online with a proctor, at a test center, or at a testing event. Results come back immediately.
  • Retakes: wait four weeks before retaking the same written exam, unless an alternate form exists.
  • The window: once you pass your first exam, you have 12 months to pass the matching written and practical exams for that designation.

Read the Core written exam guide for the domains and fees with links to NCCCO's own documents.

Want questions with explained answers first? Start with the free NCCCO practice test.

Recertifying?

NCCCO certification lasts five years, and recertification uses the same written exams as initial certification, so Core and specialty practice here applies. Read the recertification guide for the 12-month window, the 1,000-hour attestation for the practical and the fees. To see which Core topics need work, take the free 10-question check.

How to use Boom Angle

  1. Take the free 10-question check across the Core domains, with no signup.
  2. If load charts come out weakest, work through practice charts until each step (radius, configuration, deductions, net capacity) is automatic.
  3. Practice the Core arithmetic without a calculator.

Guides and tools

What do you need to work on?

All guides →

Exam facts and requirements

44 resources

What is on the exam, who can sit it, what it costs and how to keep it.

All 44 in exam facts and requirements →

Study guides

3 resources

Work through one topic at a time, with the method and worked examples.

Practice tests and drills

4 resources

Check yourself on questions, symbols and code look-ups, then see what to fix.

All 4 in practice tests and drills →

Tools and calculators

13 resources

Run the math your exam asks for and get the answer in seconds.

All 13 in tools and calculators →

Updated 20 October 2026.