Wire Rope Inspection and Replacement Flashcards
7 cards from real NCCCO practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Wire Rope Inspection and Replacement flashcards as text
When inspecting wire rope on a crane hoist drum, what condition requires immediate removal from service?
Answer: Two broken wires in one lay on a standing rope
ASME B30.2 requires removal from service if two or more broken wires are found in one rope lay on a standing rope.
What is 'bird caging' in a wire rope and what does it indicate?
Answer: Outer strands separating and opening up, indicating torsional damage
Bird caging occurs when outer strands flare outward due to sudden release of tension or shock load, indicating internal structural damage.
What is the minimum discard criterion for broken wires in a running rope (reeved over sheaves) per ASME B30 standards?
Answer: 6 broken wires in one rope lay or 3 broken wires in one strand in one lay
ASME B30 requires removal when a running rope has 6 or more broken wires in one rope lay, or 3 or more broken wires in one strand within one lay.
Which internal wire rope condition is most difficult to detect during a visual inspection?
Answer: Internal corrosion and broken core wires
Internal corrosion and broken core wires cannot be detected visually from the outside, making them a hidden hazard that requires periodic disassembly or electromagnetic inspection.
A crane operator notices a 'kink' in the wire rope. What is the correct action?
Answer: Remove the rope from service immediately; kinks are a permanent discard criterion
A kink permanently distorts the wire rope's geometry and weakens it; ASME B30 standards list kinking as an immediate removal-from-service criterion.
What does a reduction in rope diameter of 3% or more from the nominal diameter indicate?
Answer: Excessive external wear, internal wear, or core failure requiring removal from service
A 3% or greater reduction in nominal diameter is a discard criterion under ASME B30, indicating significant loss of metallic cross-sectional area.
During a wire rope inspection, you find severe heat damage with fused or annealed wires near the drum. What should you do?
Answer: Remove the rope from service immediately; heat damage is a discard criterion
Heat damage including fused, annealed, or discolored wires permanently reduces tensile strength and is an immediate removal-from-service condition.