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Mobile Crane Operator
Written
Exam | Practical
Exam | How Do I Test?
Written Exam - Sample Test
Questions
Core
Exam Outline | Specialty
Exam Outline | Sample
Test Configurations | Study
Materials
Load Charts
These sample questions are intended to convey something of the style and content of the National Operator Certification Program examination developed and administered by the National Commission for the Certification of Crane Operators (NCCCO). They are not actual test questions, nor do they attempt to address all of the areas of knowledge tested on the CCO certification examination. Response to these questions is not necessarily an indication of performance on the CCO examinations.
(Note: N/A means Not Applicable)
Configuration 1
| Outriggers: Fully Extended and Set |
Extension /Jib length: 40 ft |
| Counterweight: 95,400 lbs CC & 25,000 lbs BC |
Extension /Jib angle: 15° offset |
| Tires: N/A |
Block: N/A |
| Crawlers: N/A |
Headache Ball: 765 lbs |
| Main boom type, length: 140 ft |
Rigging: 750 lbs |
| Main Boom angle: N/A |
Wire rope (main boom): N/A |
| Radius: 110 ft |
Wire rope (extension/jib): 2 lbs/ft |
| Other: N/A |
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NOTE: For line in use, deductions for wire rope length beneath boom/jib shall be based on the boom/jib point-elevation column listed on the boom/jib capacity chart. Boom/jib point-elevation shall be rounded to the nearest whole number.
What is the gross lifting capacity off the jib?
A. 26,500 lbs
B. 29,300 lbs
C. 30,000 lbs
D. 29,500 lbs
Configuration 2
| Outriggers: Set |
Extension /Jib length: 40 ft |
| Counterweight: 27,000 lbs CC & 25,000 lbs BC |
Extension /Jib angle: 5° offset |
| Tires: N/A |
Block: 2,110 lbs 6 parts line |
| Crawlers: N/A |
Headache Ball: 600 lbs, single part line, 10 ft from Tip |
| Main boom type, length: 78T, 140 ft |
Rigging: 370 lbs. |
| Main Boom angle: N/A |
Wire rope (main boom): 1" 2 lbs/ft |
| Radius: N/A |
Wire rope (extension/jib): 1" 2 lbs/ft |
| Other: N/A |
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NOTE: For line in use, deductions for wire rope length beneath boom/jib shall be based on the boom/jib point-elevation column listed on the boom/jib capacity chart. Boom/jib point-elevation shall be rounded to the nearest whole number.
At what maximum radius can a 40,000 lbs load be lifted off the main boom over the side?
A. 40 ft
B. 45 ft
C. 50 ft
D. 55 ft
Configuration 3
| Outriggers: Fully Extended |
Extension /Jib length: 40 ft |
| Counterweight: 95,400/25,000 bumper |
Extension /Jib angle: 15° |
| Tires: N/A |
Block: 2,500 lbs, 4 parts line, hanging 20 ft below tip |
| Crawlers: N/A |
Headache Ball: 1,000 lbs, Single Sheave Block |
| Main boom type, length: 150 ft |
Rigging: 200 lbs. |
| Main Boom angle: 66.5° |
Wire rope (main boom): 1" 2 lbs/ft |
| Radius: 90 ft |
Wire rope (extension/jib): 1" 2 lbs/ft |
| Other: N/A |
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NOTE: For line in use, deductions for wire rope length beneath boom/jib shall be based on the boom/jib point-elevation column listed on the boom/jib capacity chart. Boom/jib point-elevation shall be rounded to the nearest whole number.
What is the net capacity picking off the jib over the side?
A. 39,900 lbs
B. 34,382 lbs
C. 38,600 lbs
D. 34,222 lbs
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