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

Manitowoc - Lattice Boom Truck Crane (LBT)

These sample questions are intended to convey something of the style and content of the Crane Operator Certification Program written examinations 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 examinations. 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. Weight of hoist lines beneath boom and jib point sheaves is considered part of main boom load.

Sample Item #1

Configuration On Fully Extended Outriggers Extension 40-ft. jib
Counterweight 95,400-lb. + 25,000-lb. Ext. Off-set / Angle 5-degrees
Main Boom 140-ft. Block 5,000-lb., 4-parts of line
Main Boom Angle 60.3-degrees Ball 500-lb., 1-part of line, 15-ft. below tip
Radius N/A Rigging 1,000-lb.
Other Boom Butt Mounted Auxiliary Drum Main Rope 2-lb./ft.
Other N/A Aux. Rope  2-lb./ft.

Note: For line in use, deductions for wire rope length beneath boom/jib point shall be based on boom/jib point-elevation column listed on the boom/jib capacity chart. Round boom/jib point elevation to the nearest whole number.

What is the net capacity when lifting from the main boom over the side?

A. 39,100 lb.
B. 38,030 lb.
C. 31,230 lb.
D. 42,730 lb.

Sample Item #2

Configuration On Fully Extended Outriggers Extension 30-ft. jib
Counterweight 95,400-lb. + 25,000-lb. Ext. Off-set / Angle 25-degrees
Main Boom 100-ft. Block 2,650-lb., 4-parts of line, 10-ft below tip
Main Boom Angle N/A Ball 500-lb., 1-part of line
Radius 105-ft. Rigging 375-lb.
Other N/A Main Rope 2-lb./ft.
Other N/A Aux. Rope  2-lb./ft.

Note: For line in use, deductions for wire rope length beneath boom/jib point shall be based on boom/jib point-elevation column listed on the boom/jib capacity chart. Round boom/jib point elevation to the nearest whole number.

What is the net capacity when lifting off the jib over the rear?

A. 26,029 lb.
B. 25,375 lb.
C. 25,129 lb.
D. 21,229 lb.

Sample Item #3

Configuration On Fully Extended Outriggers Extension 40-ft. jib
Counterweight 95,400-lb. + 25,000-lb. Ext. Off-set / Angle 15-degrees
Main Boom 140-ft. Block 5,000-lb., 4-parts of line
Main Boom Angle 68.5-degrees Ball 500-lb., 15-ft. below tip
Radius N/A Rigging 800-lb.
Other N/A Main Rope 2-lb./ft.
Other N/A Aux. Rope  2-lb./ft.

Note: For line in use, deductions for wire rope length beneath boom/jib point shall be based on boom/jib point-elevation column listed on the boom/jib capacity chart. Round boom/jib point elevation to the nearest whole number.

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

A. 73,200 lb.
B. 66,304 lb.
C. 60,374 lb.
D. 61,074 lb.

View answers to Manitowoc LBT sample questions.