Heavy Equipment Technician Rigging Practice Exam

Practice questions and answers for the Heavy Equipment Technician Rigging Red Seal exam, covering sling configurations, safety factors, load calculations, and wire rope specifications.

What does the abbreviation SWL stand for in the context of rigging?

Working load limit

What is the relation applied to the breaking strength of rigging to determine the Working Load Limit (WLL)?

Safety factor based on purpose

Which sling configuration provides double the rigging capacity?

Basket hitch

Which sling configuration reduces the capacity of a sling by $25\,\%$?

Choker hitch

When choking a load using a shackle in the eye, where must the pin of the shackle be placed?

In the eye of your rigging

What percentage of wire rope strength is retained by properly installed U-Bolt clips?

$$80\,\%$$

How much of a rope's strength does a Zink Spelter socket retain?

$$100\,\%$$

Running wire rope over a sharp bend can reduce the rope's strength by what percentage?

$$50\,\%$$

What percentage of strength is retained for pulling when hand splicing an eye in wire rope?

$$85\,\%$$

What is the safety factor associated with wire rope for general rigging?

$$5:1$$

What safety factor is required when hoisting personnel?

$$10:1$$

What hardware must be on material in order to lift it using a vertical hitch?

Eye bolt

What is an appropriate sling configuration for a smooth load when using a 2-leg bridle?

Double wrapped choker

When rigging with multiple legs, what is the most preferable sling angle?

$$60^{\circ}$$

Which sling angle is cautioned as being critical?

$$30^{\circ}$$

Approximately how much tension is each leg of a 2-leg bridle experiencing when lifting a $2000\,lb$ load at a $30^{\circ}$ angle?

$$2000\,lb$$

What is the main purpose of a snatch block?

To change direction of line

Properly installed wedge sockets retain what percentage of rope strength?

$$70\,\%$$

What is the mechanical advantage of a reeved block and tackle using 9 parts of line?

$$9:1$$

How many sheaves are used on a 9-part block and tackle system?

$$9$$

In a 9-part system, how many feet of line must be pulled to hoist a load $5\,ft$?

$$45\,ft$$

Using a 9-part block and tackle system, how much force is required to hold a $4000\,lb$ load stationary from the lead line?

$$444\,lb$$

What material is wire rope made from?

Improved plow steel

How does lang lay wire rope compare to regular lay wire rope?

It has more abrasion resistance

What does the term 'pre-formed wire rope' refer to?

Rope made from individual wires formed into a helix before twisting into rope

When over winding a right lay rope on a drum, where does it start?

It winds over the drum, starting on the left side

What does the abbreviation IWRC stand for?

Independent wire rope core

What is the accepted safety factor for general rigging operations?

$$5:1$$

What is the recommended eye type for wire rope slings?

Tucked eye with pressed metal sleeve

What is the recommended angle for hoisting with bridle slings?

$$60^{\circ}$$