TOEIC Link Vocabulary Cluster — Wire Rope Magnetic Rope Testing (MRT): The Field-Report Lexicon for Crane, Hoist, and Ropeway Rope Discard Decisions

A wire rope carries an entire load on a bundle of thin steel wires, and once it is in service the only way to see inside it is to run a magnetic instrument along its length. That single fact makes magnetic rope testing (MRT) one of the most report-heavy inspection domains in industrial maintenance, which is exactly why it recurs as a source domain for TOEIC Link reading passages. The workflow is fixed: an instrument is drawn along the running rope, it senses two independent defect signatures — localized flaws and gradual loss of cross-section — and a technician converts those signals into a discard-or-retain decision measured against published criteria. That sequence generates a stable cluster of roughly forty terms. A candidate who owns the cluster reads the passage at native speed; a candidate who does not stalls on the load-bearing nouns and loses the passage's argument.

This guide isolates the cluster, groups it by inspection stage, and maps each term to its native collocation and register tier, because TOEIC Link scores writing as well as reading. Pair it with the writing vocabulary precision and collocation discipline guide for the skill of choosing the exact term, and with the writing tone and register control guide for matching a term to the formality of the report around it.

Why this cluster rewards study

An MRT passage assumes its vocabulary the way a rope-access or crane-load-test passage does. If a reader decodes loss of metallic area, broken wire count, and discard criteria one word at a time, the attention the module intends for the inferential questions is consumed by decoding. Learning the cluster converts those stalls to zero and frees the reader to answer what the passage actually asks — whether the rope passes, which defect drives the decision, and what standard the disposition depends on.

Stage 1 — The rope and the instrument

The report opens by establishing what is being inspected and how.

Running rope — the wire rope in active service on a crane, hoist, or ropeway that is inspected without removing it from the machine. Collocation: the instrument is drawn along the running rope.
Magnetic rope testing (MRT) or electromagnetic inspection — the method that magnetizes the rope to full saturation and reads disturbances in the field. Collocation: the rope is tested with MRT; a flaw disturbs the field.
Magnetic saturation — driving the rope's steel to full magnetization so that any lost or broken wire shows as a signal. Collocation: the rope is saturated before the pass.
Rope construction and lay length — the way strands are wound and the axial distance in which a strand makes one full turn, used as the reference length for counting broken wires. Collocation: broken wires are counted over one lay length.
Reference speed — the drawing velocity held steady so the signal stays calibrated. Collocation: the pass is run at the reference speed.

Stage 2 — The two defect signatures

This stage carries the cluster's most discriminating vocabulary — the LMA-versus-LF distinction that structures the entire report.

Loss of metallic area (LMA) — the gradual, distributed reduction of steel cross-section from abrasion, corrosion, or wear. This is the report's central quantitative noun. Collocation: LMA is reported as a percentage of nominal area.
Localized fault (LF) — a discrete, abrupt defect such as a broken wire, a groove, or a corrosion pit. Collocation: an LF signal indicates a broken wire or pit.
Broken wire — a wire severed inside or on the surface of the rope. Collocation: broken wires are counted and mapped along the rope.
Internal wire break — a fracture not visible on the surface, detectable only magnetically. Collocation: internal breaks are revealed by MRT.
Nominal metallic area — the original, undamaged cross-section against which loss is measured. Collocation: LMA is expressed against nominal area.

Stage 3 — Deterioration mechanisms

The middle of the report attributes signals to causes, and TOEIC Link questions target these terms for procedural inference.

Corrosion — rusting that thins wires and reduces area, often worst at the rope's core. Collocation: corrosion accumulates internally; the core is corroded.
Interstrand nicking and internal wear — wires wearing against each other inside the rope under bending load. Collocation: wear develops between strands.
Fatigue — progressive cracking from repeated bending over sheaves. Collocation: wires fail in fatigue at bend points.
Birdcaging and strand distortion — the rope structure opening up or deforming so strands separate. Collocation: the rope exhibits birdcaging.
Diameter reduction — a drop in measured rope diameter indicating core damage or wear. Collocation: diameter is measured and compared against the nominal value.

Stage 4 — Assessment against criteria

The assessment stage converts signals into a verdict.

Discard criteria — the published thresholds at which a rope must be removed from service. Collocation: the rope is assessed against the discard criteria.
Threshold — the LMA percentage or broken-wire count above which the rope fails. Collocation: an indication exceeds the threshold.
Retirement or discard — removing the rope from service. Collocation: the rope is retired or recommended for discard.
Retained in service — the disposition when all indications fall within limits. Collocation: the rope is retained subject to re-inspection.
Re-inspection interval — the period after which the rope must be tested again. Collocation: the interval is shortened when deterioration is progressing.

Stage 5 — Reporting and disposition

The report closes with the deliverable.

Defect map or rope chart — the length-referenced plot of every LMA and LF indication. Collocation: indications are plotted on the rope chart.
Calibration — the reference run on a known rope that sets the signal scale. Collocation: the instrument is calibrated before the survey.
Disposition — the formal pass, retain-with-monitoring, or discard decision. Collocation: a disposition is issued and signed off.
Traceability — the record linking the survey to the specific rope, machine, and date. Collocation: results are traceable to the rope serial.
Recommendation — the closing action, from continued monitoring to immediate replacement. Collocation: the report recommends a shortened interval or replacement.

Register tiers within the cluster

The cluster splits cleanly across the register tiers TOEIC Link rewards a candidate for controlling. Loss of metallic area, localized fault, discard criteria, and magnetic saturation are high-technical nouns that carry the report's argument and should be produced exactly. Broken wire count, lay length, and re-inspection interval are mid-tier operational terms. Retired, retained, and recommends are the plain verbs that any reader must map instantly. A candidate who can move a finding up the register — reporting "the rope exceeds discard criteria and is recommended for retirement" rather than "the rope is too worn to use" — demonstrates exactly the control the writing module scores.

How to drill the cluster

Read one real MRT or wire-rope discard-standard summary and mark every term above as you meet it; the density will surprise you. Then write a three-sentence disposition that (1) names the governing signature — LMA or a localized fault, (2) states the reading against the criterion, and (3) issues the retain-or-discard recommendation. Producing that paragraph from memory is the fastest way to convert a passive reading acquaintance with the cluster into the active control TOEIC Link measures.

For the writing-side skills this cluster feeds, continue with the writing vocabulary precision and collocation discipline guide and the writing tone and register control guide.