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 Crawler Crane (LBC)

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 Crawlers Extended Extension 30-ft. jib
Counterweight 179,100-lb. + 44,000-lb. Ext. Off-set / Angle 5-degrees
Main Boom 260-ft. Block N/A
Main Boom Angle 65-degrees Ball 500-lb., 1-part of line
Radius 130-ft. Rigging 150-lb.
Other 1,545-lb. Lifting Beam Main Rope N/A
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 the boom/jib point-elevation column listed on the boom/jib capacity chart. Boom/jib point elevation shall be rounded to nearest whole number.

What is the net capacity when lifting off the jib?

A.   21,665 lb.
B.   21,705 lb.
C.   21,165 lb.
D.   22,205 lb.

Sample Item #2

Configuration Crawlers Extended Extension 30-ft. jib
Counterweight 179,100-lb. + 44,000-lb. Ext. Off-set / Angle 5-degrees
Main Boom 190-ft. Block 1,200-lb., 2-parts of line
Main Boom Angle 69.1-degrees Ball N/A
Radius N/A Rigging 150-lb.
Other N/A Main Rope 2-lb./ft.
Other N/A Aux. Rope N/A

Note: For line in use, deductions for wire rope length beneath boom/jib point 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 nearest whole number.

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

A.   62,500 lb.
B.   54,210 lb.
C.   57,710 lb.
D.   64,402 lb.

Sample Item #3

Configuration Crawlers Extended Extension 30-ft. jib
Counterweight 179,100-lb. + 44,000-lb. Ext. Off-set / Angle 5-degrees
Main Boom 120-ft. Block 2,175-lb., 4-parts of line
Main Boom Angle 58.3-degrees Ball 500-lb., 1-part of line, 10-ft. below tip
Radius N/A Rigging 310-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 the boom/jib point-elevation column listed on the boom/jib capacity chart. Boom/jib point elevation shall be rounded to nearest whole number.

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

A.   64,323 lb.
B.   64,843 lb.
C.   57,647 lb.
D.   67,023 lb.