WTT Rigging & Lifting Operations

Question 1

What does WLL stand for in the context of rigging equipment?

Accepted Answer

Working Load Limit

Answer

WLL (Working Load Limit) is the maximum load that rigging equipment is rated to handle under normal conditions.

Question 2

When inspecting wire rope, what is the typical maximum allowable number of broken wires in one rope lay length before it must be removed from service?

Accepted Answer

6 broken wires in one rope lay

Answer

Industry standards (ASME B30.2) generally require removing wire rope from service if 6 or more broken wires are found within one rope lay length.

Question 3

What is the primary purpose of a rigging plan before lifting heavy wind turbine components such as a nacelle?

Accepted Answer

To identify hazards, assign responsibilities, and define lift procedures before work begins

Answer

A rigging plan proactively identifies hazards, defines roles, specifies equipment, and establishes procedures to ensure a safe lift.

Question 4

Which sling configuration provides the LOWEST effective working load limit relative to the sling's rated capacity?

Accepted Answer

Choker hitch

Answer

A choker hitch reduces the sling's effective WLL to approximately 75% of its vertical rating due to the bend angle and friction created at the choke point.

Question 5

What color identifies a synthetic web sling with a 1-ton (2,000 lb) vertical working load limit per the Web Sling and Tiedown Association (WSTDA) standard?

Accepted Answer

Green

Answer

WSTDA color coding assigns green to synthetic web slings rated for a 1-ton (2,000 lb) vertical WLL.

(WTT) Wind Turbine Technician Certification Practice Test

(WTT) Wind Turbine Technician Certification Practice Test

WTT Rigging & Lifting Operations