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


​Articulating Crane Operator

Written Exam - Sample Questions

The following are sample test questions typical of the style and content of the questions used in CCO Written Examinations.

  1. The numbers shown on the crane’s load chart are:
    1. Net capacity
    2. Gross capacity
    3. Deducted capacity
    4. Structural capacity
  1. If no load chart is available for the type of lift to be performed, you should:
    1. Perform the lift with caution
    2. Only lift 50 percent of rated capacity
    3. Not perform the lift at all
    4. Use a load chart for a similar lift
  1. Whenever the stabilizers are not visible to the operator during extending or setting, the operator must:
    1. Exercise extreme caution
    2. Be assisted by another person
    3. Extend or retract the stabilizers no faster than half speed
    4. Ensure no other personnel are in the immediate vicinity
  1. What do the letters "OLP" stand for as they relate to articulated cranes?
    1. Operator’s lifting performance
    2. Over-loading percentages
    3. Operating load parameters
    4. Overload protection
  1. When is it acceptable to load an articulating crane beyond the rated load?
    1. If the lifting attachment is rated for the load
    2. Only while operating for load test purposes
    3. When approved by the site supervisor
    4. If deployment of extensions is not required for lift
  1. What is the net capacity at a radius of 41 ft. when lifting directly over the front of the truck, given the load charts and crane configuration below?
    Alternative Boom Crane Work Area Load Chart
    Truck Configuration:
    Crane A
    Stabilizer—Drive Side:
    Fully Extended 
    Stabilizer—Passenger Side:
    Fully Extended
    Attachment Weight:
    Attachment Capacity:
    Rigging Weight:
    250 lb.
    Manual Extension:

    1. 1,070 lb.
    2. 1,320 lb.
    3. 1,390 lb.
    4. 3,050 lb.

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