National Commission for the
Certification of Crane Operators
Committed to Quality, Integrity, and Fairness in Testing since 1995


Overhead Crane Operator

Written Exam - Exam Outline

The CCO Overhead Crane Operator written certification exam tests the following knowledge areas relating to the operation of overhead cranes:

Domain 1: Pre-Operation Activities
(Approximately 27% of the test)

Domain 2: Work Requirements
(Approximately 27% of the test)

Domain 3: Load Handling
(Approximately 27% of the test)

Domain 4: Shutdown & Secure
(Approximately 4% of the test)

Domain 5: Technical Knowledge
(Approximately 15% of the test)


(Approximately 27% of the test)

  1. Knowledge of emergency shutdown procedures.
  2. Know where to locate and verify access to main runway disconnect.
  3. Knowledge of lockout/tag-out condition resolutions.
  4. Knowledge of initial inspection of both visual and audible hazards.
  5. Knowledge of proper control labeling and conditioning.
  6. Knowledge of pendant control strain relief requirements.
  7. Knowledge of warning and capacity labeling requirements.
  8. Know where to check for oil leaks.
  9. Knowledge of wire rope or chain condition and proper spooling.
  10. Knowledge of applicable requirements for guards.
  11. Knowledge of applicable fire extinguisher requirements.
  12. Knowledge of emergency stop function.
  13. Knowledge of applicable bumper/stop requirements.
  14. Knowledge of ASME B30.2 control layout.
  15. Knowledge of all limit devices and control functions.
  16. Knowledge of brake test procedure.
  17. Knowledge of all warning devices.
  18. Knowledge of load block, hook and latch requirements.


(Approximately 27% of the test)

  1. Determine how much the load weighs.
  2. Know the proper use of below the hook lifting devices.
  3. Know proper rigging selection and applications.
  4. Know how to move crane into correct lifting position to assure true vertical lift of load.
  5. Know how to avoid side pulling or swinging of load during start, stop and travel.
  6. Identify signal person
  7. Know ASME B30.2 hand signals.
  8. Communicate lift activity to other workers.


(Approximately 27% of the test)

  1. Verify communication devices (i.e. radios) are functioning correctly.
  2. Perform hoist brake check with load.
  3. Verify crane and load path is clear of personnel and obstructions.
  4. Know when to activate warning alarm system.
  5. Know how to operate hoist, bridge and trolley safely.
  6. Know how to avoid shock loading.
  7. Know how to minimize load swing.
  8. Verify floor capacity, know how to safely set load down ad remove rigging.


(Approximately 4% of the test)
  1. Know where to park the crane
  2. Know shutdown procedures
  3. Report deficiencies or problems to supervision.


(Approximately 15% of the test)
  1. Knowledge of ASME B30.2-Overhead and Gantry Crane (Top Running Bridge, Single or Multiple Girder, Top Running Trolley Hoist).
  2. Knowledge of ASME B30.20-Below-the-Hook Lifting Devices.
  3. Knowledge of OSHA 1910.179-Overhead and Gantry Cranes.
  4. Knowledge of OSHA 1910.184-Slings
  5. Knowledge of other applicable rules, standards and regulations.
  6. Knowledge of crane manufacturer's operating instructions.
  7. Knowledge of functions and limitations of crane components and attachments.