NCCCO Wire Rope Inspection and Replacement 2

Question 1

What is the minimum number of randomly distributed broken wires in one rope lay that requires wire rope removal from service per ASME B30.5?

Accepted Answer

6 broken wires

Answer

3 broken wires

Answer

10 broken wires

Answer

12 broken wires

Question 2

Wire rope with kinks should be:

Accepted Answer

Immediately removed from service and discarded

Answer

Used only for light lifts below 25% of rated capacity

Answer

Carefully straightened using a hydraulic press before reuse

Answer

Inspected annually and removed only if kinks worsen

Question 3

What does corrosion inside a wire rope indicate, and how can it typically be detected?

Accepted Answer

Internal wire deterioration; detected by loss of rope diameter, stiffness changes, or discoloration at rope interstices

Answer

Surface rust only; detected by visual inspection of the outer strands

Answer

Normal aging; no action required unless ropes are over 5 years old

Answer

Chemical contamination; detected by smell during inspection

Question 4

When measuring wire rope for diameter reduction, at what percentage of nominal diameter reduction must rope be removed from service?

Accepted Answer

3% reduction

Answer

1% reduction

Answer

5% reduction

Answer

10% reduction

Question 5

What is 'bird caging' in wire rope, and what causes it?

Accepted Answer

Outward flaring of wire rope strands caused by sudden shock load or reverse bending

Answer

Protective cage installed around the wire rope to prevent damage

Answer

Pattern of corrosion pits that resemble a cage on outer strands

Answer

Special wire rope configuration used in multi-part line arrangements

Question 6

A wire rope's 'lay direction' refers to:

Accepted Answer

The direction in which the outer strands are helically twisted around the rope's center

Answer

The direction in which the rope must be reeved through the block and tackle

Answer

The path the rope follows from the drum to the load block

Answer

The angle at which wire rope contacts a sheave groove