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

CERTIFICATIONS

Mobile Crane Operator

Written Exam - Sample Questions

American - Lattice Boom Crawler Crane (LBC)

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.

For testing purposes, the following notes apply:

  1. “N/A” means “Not Applicable.”
  2. The gross capacity is the maximum allowable crane loading as determined by the load rating chart and/or any other applicable limitation(s). Limitations may include, but are not limited to: line pull, parts of line, rope type, hoisting point, etc.
  3. Rated lifting capacities are based on correct reeving. Deductions must be made for excessive reeving.Any reeving over minimum required is considered excessive and must be accounted for when making lifts.

Sample Item #1

Configuration Side Frames Extended Extension N/A
Counterweight 58,100-lb. Ext. Off-set / Angle N/A
Main Boom 110-ft. Block N/A
Main Boom Angle N/A Ball 700-lb., 1-part of line
Radius 45-ft. Rigging 500-lb.
Other N/A Main Rope 2-lb./ft.
Other N/A Aux. Rope N/A

Note: For line in use, when wire rope deductions are required, the wire rope length shall be measured from the boom tip to the ground.

What is the net capacity when lifting off the main boom?

A. 21,540 lb.
B. 23,450 lb.
C. 22.740 lb.
D. 22,040 lb.

Sample Item #2

Configuration Side Frames Extended Extension 50-ft. Jib
Counterweight 58,100-lb. Ext. Off-set / Angle 15-degree offset
Main Boom 170-ft. Block N/A
Main Boom Angle 72-degrees Ball 450-lb.
Radius N/A Rigging 320-lb.
Other N/A Main Rope N/A
Other N/A Aux. Rope 2-lb./ft.

Note: For line in use, when wire rope deductions are required, the wire rope length shall be measured from the boom tip to the ground.

What is the net capacity when lifting off the jib?

A. 7,600 lb.
B. 7,380 lb.
C. 5,100 lb.
D. 6,830 lb.

Sample Item #3

Configuration Side Frames Extended Extension N/A
Counterweight 58,100-lb. Ext. Off-set / Angle N/A
Main Boom 130-ft. Block 1,200-lb., 2-parts of line
Main Boom Angle N/A Ball N/A
Radius 65-ft. Rigging 450-lb.
Other N/A Main Rope 2-lb./ft.
Other N/A Aux. Rope N/A

Note: For line in use, when wire rope deductions are required, the wire rope length shall be measured from the boom tip to the ground.

What is the net capacity when lifting off the main boom?

A. 14,000 lb.
B. 13,764 lb.
C. 17,344 lb.
D. 15,650 lb.

Answers to American LBC sample questions.