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Free diagnosticsNCCCO writtenCoursesNCCCO written courseGuidesThe Core written exam: 95 questions, 90 minutes, no calculatorHow to read a crane load chartWritten exam fees, the four-week retake wait and the 12-month windowCrane operator certification requirements: written, practical, medicalNCCCO written test: passing score, test sites and online testingCrane operator license: which states require oneFree toolsLoad chart practice: 10 problems on a practice chartNet capacity worksheet: subtract every deduction, step by stepSling angle calculator: leg tension and load angle factorBoom AngleAbout and editorial policy

Free 25-question diagnostic · no signup

Free NCCCO written practice test

Start a free NCCCO practice test for Mobile Crane Operator written prep with 25 original questions in about 24 minutes. See results by published Core outline domain to plan your written-exam study.

Start the free diagnostic
  • 25 questions
  • About 24 minutes
  • Scored by domain

Full NCCCO written course: $99, available now. See what's inside →

Exam at a glance

Format
95 questions in 90 minutes
Delivery
Online Proctored Testing (OPT), Test Center Testing (TCT) or Event Online Testing (EOT); results immediately
Fee
Not listed in the exam facts
Retakes
Wait four weeks before retaking the same written exam, unless an alternate form exists (then retest sooner). Practical retakes not affected. Failing candidates get a strengths/weaknesses report.

What it covers

Site22%
Operations28%
Technical Knowledge23%
Load Charts27%

Diagnostic questions follow these domains, subject to the available practice questions.

Original practice questions written to the published content outline. Never real or recalled exam questions.

How it works

  1. Answer

    25 questions on a timer. Skip any you don't know.

  2. See your score

    Blueprint-weighted, broken down by domain, with your weakest one named.

  3. Study smarter

    Add your email and exam date to unlock the answer review and a study plan.

The NCCCO written course

Available now · instant access

Learn every outline domain, work load charts step by step, then prove it on timed exams.

  • 8modules of lessonsEvery task on the outline
  • 2full-length timed exams95 questions in 90 minutes each
  • 400practice questionsEach one explained
  • 2worked calculationsStep by step
  • 1week-by-week study planSet to your exam date
See all 8 modules
  1. Setting up on firm ground
  2. Planning and making the lift
  3. Operator aids, special lifts and emergencies
  4. Forces on the crane, weather and shutdown
  5. Rules, terms and inspections
  6. Rigging, wire rope and access
  7. Load chart fundamentals
  8. Manufacturers' load charts on the specialty exams

Question bank and timed exams: Expert-reviewed: every question was checked by a certified crane operator with 20 years experience (2026-10-19). Every answer key is confirmed by a separate blind solve, and reported errors are fixed within 2 business days.

Practice test FAQ

How long is the free diagnostic?

The free diagnostic has 25 questions and takes about 24 minutes. It is a short study check, rather than a full-length exam simulation.

Is this an NCCCO Core exam practice test or a practical test?

This short diagnostic is organised around the Mobile Crane Operator Core written outline. It is not a practical test or a complete specialty exam simulation. Prepare separately for your chosen specialty and practical assessment.

Is the diagnostic free?

Yes. You can start the diagnostic and see your score and domain breakdown for free, with no signup or payment.

Where does the practice content come from?

These are original practice questions written to the published outline. We never use real or recalled exam items. Treat the results as a starting point for study.

How is the diagnostic scored?

Practice items are grouped by the published outline's domains, subject to available questions. The diagnostic weights domain results using the configured published outline weights. This practice percentage helps set study priorities; it does not predict your exam score or certification outcome.

What do I see after finishing?

You see your overall practice score, a domain breakdown and your weakest domain. Use those results alongside the published outline to choose topics to revisit.

How should I use the result to study?

Review the domains where you struggled, compare them with the published outline and return to your study references. A short diagnostic samples only part of the content; completing it does not establish exam readiness.

  1. 01Free NCCCO written diagnostic25 questions, about 24 minutes. See your weakest domain.Start free
  2. 02Core + 1 specialty course$99. Lessons, timed practice exams and a plan around your exam date.See the plans

Want the full picture first?Format, domains, references and published sources in one page.

Read the NCCCO written exam guide