NCCCO Mobile Crane Exam Questions and 100

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NCCCO Mobile Crane Exam Questions and 100% Correct Verified ANSWERs| Grade A **1. What action does a signal person intend the operator to perform if he extends his arm at shoulder height, makes a fist with his hand, and sticks his/her thumb up?**

• Boom down
• Swing
• Boom up
• Extend boom

ANSWER: c. Boom up

This is the standard hand signal for "boom up" per ASME B30.5 and OSHA guidelines.

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**2. When hoisting personnel, within what percentage of level must a telescopic boom crane be in order for the gross ratings in the load chart to remain valid?**

• 1%
• 2%
• 5%
• 8%

ANSWER: a. 1%

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OSHA 1926.1431 requires cranes to be level within 1% when hoisting personnel to ensure load chart ratings remain valid.

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**3. The load line of the crane you're operating contacts an energized power line. There's no sign of any other danger, such as fire. What should you do?**

• Climb down carefully from the crane cab
• Jump down, feet together
• Stay in the cab until the lines are de-energized
• Get as far away from the crane as possible

ANSWER: c. Stay in the cab until the lines are de-energized

OSHA 1926.1408 advises staying in the cab to avoid electrocution unless there’s an immediate danger (e.g., fire).

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**4. According to OSHA 1926.1413, how many randomly distributed broken wires in rotation-resistant rope are cause for replacement of the rope?**

• 1 broken wire in 6 rope diameters
• 2 broken wires in 30 rope diameters

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• 3 broken wires in one strand in one lay
• 2 broken wires in 6 rope diameters

ANSWER: d. 2 broken wires in 6 rope diameters

OSHA 1926.1413(a)(2)(ii)(A)(1) specifies that rotation-resistant rope must be replaced if there are 2 randomly distributed broken wires in 6 rope diameters or 4 in 30 rope diameters. The question asks for the minimum threshold, which is 2 in 6.

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**5. What is the net capacity of a crane on main boom unless the manufacturer states otherwise?**

• The capacity listed in the load chart minus the weight of the

rigging and all attachments

• The capacity listed in the load chart plus the weight of the

rigging and all attachments

• The capacity listed in the load chart minus the weight of the

rigging and all attachments not in use

• The capacity listed in the load chart minus the weight of the

rigging alone

ANSWER: a. The capacity listed in the load chart minus the

weight of the rigging and all attachments Net capacity accounts for deductions of all rigging and attachments per ASME B30.5.

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**6. What may happen to a properly rigged load when lifted off the ground unless the operator takes account of boom deflection?**

• It could swing out away from the crane
• It could swing in towards the crane
• It could raise absolutely vertically
• It could shift in its rigging

ANSWER: a. It could swing out away from the crane

Boom deflection increases the radius, causing the load to swing outward if not compensated.

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**7. What Standard Method hand signal is being illustrated?**

• Swing
• Stop
• Emergency Stop
• Travel

ANSWER: a. Swing