Crane Operator NCCCO Exam Questions & Answers 2026 (1–10)

Question 1

When must a pre-shift inspection of a crane be performed?

TheoryPractice · Accepted 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.

Question 2

Which of the following is included in a pre-shift (frequent) inspection of a mobile crane?

TheoryPractice · Accepted 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.

Question 3

Who is responsible for conducting the pre-shift inspection of a crane?

TheoryPractice · Accepted 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.

Question 4

During a pre-shift inspection, the operator finds that the load line anti-two-block device is not functioning. What is the correct action?

TheoryPractice · Accepted 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.

Question 5

What condition of wire rope requires it to be immediately removed from service?

TheoryPractice · Accepted 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.

Question 6

A 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?

TheoryPractice · Accepted 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.

Question 7

Which type of wire rope deterioration is characterized by a corkscrewing or helical deformation of the rope's axis?

TheoryPractice · Accepted 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.

Question 8

For 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?

TheoryPractice · Accepted 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.

Question 9

A crane hook must be removed from service if it has been opened (throat opening increased) by more than what percentage of its original dimension?

TheoryPractice · Accepted 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.

Question 10

What is the purpose of the safety latch on a crane hook?

TheoryPractice · Accepted 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.

Crane Operator NCCCO Exam Questions & Answers 2026 (1–10)

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