TheoryFree Crane Operator NCCCO Practice Test
Take a free Crane Operator NCCCO practice test for 2026 with questions, answers, explanations, PDF download and timed mock exam links.
Crane Operator NCCCO Questions
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Q1When must a pre-shift inspection of a crane be performed?
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✓ Correct answer: Before each shift during which the crane will be used
ASME B30.5 and OSHA 1926.1412 require a visual inspection before each shift the equipment is to be used. This ensures any damage or defect that occurred since the last use is caught before operations begin.
Q2Which of the following is included in a pre-shift (frequent) inspection of a mobile crane?
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✓ Correct answer: Visual inspection of all control mechanisms for proper operation
Pre-shift (frequent) inspections include visual checks of control mechanisms, wire rope, hooks, and safety devices. Disassembly, load testing, and non-destructive testing (NDT) are part of periodic inspections.
Q3Who is responsible for conducting the pre-shift inspection of a crane?
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✓ Correct answer: A qualified/competent person or the operator
OSHA 1926.1412 specifies that equipment must be inspected by a qualified person or, for the pre-shift visual inspection, by the operator prior to use each shift.
Q4During a pre-shift inspection, the operator finds that the load line anti-two-block device is not functioning. What is the correct action?
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✓ Correct answer: Remove the crane from service until the device is repaired
Anti-two-block devices are required safety devices. OSHA 1926.1416 states that if a required safety device is not functioning, the equipment must be taken out of service until repaired. Operating with a substitute measure does not satisfy the regulation.
Q5What condition of wire rope requires it to be immediately removed from service?
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✓ Correct answer: Six randomly distributed broken wires in one rope lay
ASME B30.5 specifies removal criteria including six randomly distributed broken wires in one lay length or three broken wires in one strand in one lay. Lubrication and minor oxidation are normal; small diameter variance within tolerance is acceptable.
Q6A mobile crane wire rope shows a reduction in diameter of 1/64 inch from its nominal diameter of 3/4 inch. What should the operator do?
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✓ Correct answer: Remove the rope from service immediately
ASME B30.5 requires removal from service if the wire rope diameter has decreased more than 1/64 inch from nominal for ropes up to 3/4 inch diameter. A 1/64-inch reduction on a 3/4-inch rope is exactly at the removal threshold.
Q7Which type of wire rope deterioration is characterized by a corkscrewing or helical deformation of the rope's axis?
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✓ Correct answer: Corkscrew (wavy) distortion
Corkscrew or wavy distortion occurs when one or more strands deform out of position, giving the rope a helical set. This condition reduces the rope's load-bearing capacity and requires removal from service.
Q8For a 6×19 classification wire rope of 1-inch nominal diameter, what is the maximum number of broken wires per lay length before removal from service under ASME B30.5?
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✓ Correct answer: 12 broken wires randomly distributed, or 4 in any one strand
ASME B30.5-4.1.2 specifies removal when there are 12 randomly distributed broken wires in one lay or 4 broken wires in one strand in one lay for 6×19 classification rope. The 6-wire criterion applies to 6×7 classification rope.
Q9A crane hook must be removed from service if it has been opened (throat opening increased) by more than what percentage of its original dimension?
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✓ Correct answer: 15%
ASME B30.10 requires that hooks be removed from service if the throat opening has increased more than 15% from the original dimension. This indicates the hook has been overloaded and deformed beyond safe use.
Q10What is the purpose of the safety latch on a crane hook?
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✓ Correct answer: To prevent the load line or sling from accidentally slipping out of the hook
The safety latch (also called a safety catch or keeper) is designed to retain the sling or load line inside the hook's bowl, preventing accidental disengagement during lifting operations.
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