Free NCCCO Crane Practice Test

✓ Correct Answer: The maximum load the crane may lift at that operating radius under specified conditions

Load chart rated capacity is the maximum gross load (load + rigging + hook block) the crane may lift at a specific combination of boom length and operating radius, with all chart conditions met (outriggers set, on level ground, on firm surface). Rated capacity already includes a safety derating factor — typically 75–85% of actual tipping capacity. Operating over rated capacity is prohibited.

✓ Correct Answer: The person responsible for directing the crane and rigging team during a critical or multiple-crane lift

Under OSHA 29 CFR 1926.1400, a Lift Director is the qualified person responsible for directing all crane and rigging activities during a multiple-crane lift or a critical lift. The Lift Director has authority over all personnel involved in the lift, ensures the lift plan is followed, and may stop the lift if unsafe conditions arise.

✓ Correct Answer: 20 feet

OSHA 1926.1408 Table A requires a minimum 20-foot clearance from power lines rated up to 350 kV when the voltage is unknown or not confirmed. For lines rated 350–1,000 kV, the minimum is 50 feet. This 20-foot rule applies to the crane, load, rigging, and any part of the equipment. A utility owner must confirm voltage before reduced clearances are used.

✓ Correct Answer: Has successfully demonstrated the ability to perform the rigging tasks required, including knowledge of rigging equipment, inspection, and sling capacities

OSHA 29 CFR 1926.1401 defines a qualified rigger as a rigger who meets the criteria of a 'qualified person' — someone who by possession of a recognized degree, certificate, or professional standing, or by extensive knowledge, training, and experience, has successfully demonstrated the ability to solve or resolve problems relating to rigging loads. No specific formal certification is mandated by OSHA, but the person must be capable.

✓ Correct Answer: Before each shift the crane is used

OSHA 1926.1412(d) requires a shift inspection (pre-shift inspection) before each shift in which the crane will be used. The operator must visually inspect critical items including the hook and hook latch, rope/wire rope, controls, safety devices, fluid levels, tires (if applicable), and structural components. Any deficiency that affects safe operation must be corrected before use.

✓ Correct Answer: Both arms extended horizontally, palms down, moving rapidly back and forth

The standard ASME B30.5 hand signal for Emergency Stop is both arms extended horizontally with palms facing down, moving back and forth rapidly. The Stop signal (non-emergency) is one arm extended horizontally, palm down, moving back and forth. Emergency Stop indicates the load must be stopped immediately and securely. All personnel on site should recognize this signal.

✓ Correct Answer: The maximum load to which the component may be subjected in normal service

Working Load Limit (WLL) — also called Rated Capacity or Safe Working Load — is the maximum load that must not be exceeded in normal service. It is typically determined by dividing the minimum breaking strength (MBS) by the design factor (often 5:1 for wire rope slings, 4:1 for chain). WLL must be marked on slings, hooks, shackles, and other rigging hardware.

✓ Correct Answer: Increases — at 30 degrees each leg carries twice the load it would at 60 degrees

As sling angle decreases, the tension in each sling leg increases dramatically. At 60 degrees, each leg carries approximately 1.15 times the load per leg (angle factor ≈ 0.866). At 30 degrees, the angle factor drops to 0.5, meaning each leg carries twice the load compared to a vertical lift. ASME B30.9 recommends sling angles of 60 degrees or greater whenever possible.

✓ Correct Answer: A qualified person who understands the assembly/disassembly procedures for that crane

OSHA 1926.1404 requires that assembly and disassembly of cranes be supervised by a 'qualified person' — someone with thorough knowledge of the equipment, who has read the manufacturer's assembly/disassembly instructions, and can recognize hazards associated with the process. The qualified person must be present and direct operations throughout the entire A/D process.

✓ Correct Answer: A safety device such as the anti-two-block system is malfunctioning

OSHA 1926.1412(f) requires a crane to be taken out of service immediately when a safety device is not functional — including the anti-two-block device, load moment indicator, or boom angle indicator. The crane must not be used until the deficiency is corrected and the device is functioning properly. Other out-of-service triggers include cracked structural welds, damaged wire rope meeting removal-from-service criteria (per ASME B30.5), and hydraulic system failures.