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CERTIFICATION PROGRAMS

Mobile Crane Operator

Written Exam - Telescopic Boom Crane-Swing Cab (TLL) 

Grove

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)

Sample Item #1

Configuration On Outriggers Fully Extended Extension N/A
Counterweight 7,800-lb. Removable Ext. Off-set / Angle N/A
Main Boom 70-ft. Block 15 Ton, 1 Sheave, 2-parts of line
Main Boom Angle N/A Ball 7.5 Ton, 10-ft. below tip
Radius 50-ft. Rigging 250-lb.
Other Auxiliary Boom Head Main Rope 1-lb./ft.
Other N/A Aux. Rope 1-lb./ft.

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

What is the net capacity lifting off the main over the side?

A.   10,329 lbs.

Incorrect, No deduct for excess main rope

B.   10,422 lbs.

Incorrect, No Auxiliary boom head deduction

C.   10,779 lbs.

Incorrect, Used over the rear chart

D.   10,279 lbs.

Correct,
Gross Capacity
11,450
Block
380
Ball
338
Rigging
250
Main Rope
50
Aux Rope
10
Auxiliary Boom Head
143
Total Deducts
1,171
Net Capacity
10,279

Sample Item #2

Configuration On Outriggers Fully Extended Extension Fixed Extension Stowed
Counterweight 7,800-lb. Removable Ext. Off-set / Angle N/A
Main Boom 70-ft. Block 15 Ton, 1 Sheave, 2-parts of line
Main Boom Angle N/A Ball 7.5 Ton, 10-ft. below tip
Radius 49-ft. Rigging 150-lb.
Other Auxiliary Boom Head Main Rope 1-lb./ft.
Other N/A Aux. Rope 1-lb./ft.

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

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

A.   10,262 lbs.

Incorrect, Forgot rigging

B.   12,312 lbs.

Incorrect, Wrong radius at 45 ft.

C.   10,112 lbs.

Correct,
Gross Capacity
11,450
Jib
267
Block
380
Ball
338
Rigging
150
Main Rope
50
Aux Rope
10
Auxiliary Boom Head
143
Total Deducts
1,338
Net Capacity
10,112

D.   10,162 lbs.

Incorrect, No excess main rope deduct

Sample Item #3

Configuration On Outriggers Fully Extended Extension Fixed Extension Stowed
Counterweight 7,800-lb. Removable Ext. Off-set / Angle N/A
Main Boom 68-ft. Block 15 Ton, 1 Sheave, 2-parts of line
Main Boom Angle N/A Ball 7.5 Ton, 10-ft. below tip
Radius 44-ft. Rigging 125-lb.
Other Auxiliary Boom Head Main Rope 1-lb./ft.
Other N/A Aux. Rope 1-lb./ft.

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

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

A.   12,061 lbs.

Incorrect, Deducted the tele. boom extension

B.   12,017 lbs.

INcorrect, Deducted excess rope

C.   12,087 lbs.

Correct,
Gross Capacity
13,350
Jib
267
Block
380
Ball
338
Rigging
125
Aux Rope
10
Auxiliary Boom Head
143
Total Deducts
1,263
Net Capacity
12,087

D.   12,337 lbs.

Incorrect, Wrong gross at 70 ft.