Wire Rope Inspection and Replacement Flashcards
6 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 6 Wire Rope Inspection and Replacement flashcards as text
What is the purpose of lubrication in wire rope, and how often should it typically be applied?
Answer: Lubrication reduces internal friction, prevents corrosion, and should be applied per the manufacturer's or employer's maintenance schedule
Wire rope lubrication reduces internal wire-on-wire friction, prevents corrosion, and extends rope life. The application frequency is determined by the manufacturer's guidelines and the operating environment.
Which of the following describes 'valley breaks' in wire rope?
Answer: Broken wires hidden in the valleys between outer strands, difficult to detect visually
Valley breaks are wire fractures that occur in the valleys between outer strands, where they contact adjacent strands, making them difficult to detect through routine visual inspection.
Wire rope must be replaced if the core is damaged. Which of the following is a sign of internal core failure?
Answer: Reduction in rope diameter and increased rope stiffness or softness
Internal core failure often manifests as a measurable reduction in rope diameter and changes in rope flexibility — the rope may become either stiffer (wire rope core collapse) or softer/wavy (fiber core failure).
When inspecting wire rope at end terminations (such as swaged sockets or wedge sockets), what specific concern should the inspector look for?
Answer: Broken wires just behind the socket, crown cracking, or rope rotation within the fitting
End terminations are high-stress areas where broken wires, crown cracking near the socket, and rope rotation within the fitting are common failure modes that must be identified during inspection.
What is meant by the term 'rope fatigue' in wire rope inspection?
Answer: Progressive wire breakage caused by cyclic bending stresses as rope passes over sheaves and drums
Rope fatigue is the progressive accumulation of damage from cyclic bending stress as wire rope repeatedly flexes over sheaves and drums, eventually causing fatigue wire breaks.
Which of the following describes the correct procedure for installing a new wire rope on a crane drum?
Answer: Unreel rope from a reel or pay it off a coil standing upright, maintaining tension to prevent kinking
New wire rope should be unreeled from a reel or paid off a standing coil under controlled tension to prevent slack, looping, and kinking during installation.