WTT Rigging & Lifting Operations 3

Question 1

At approximately what sustained wind speed should crane-assisted lifting operations on a wind turbine site typically be suspended per general industry guidelines?

Accepted Answer

20 mph (32 km/h)

Answer

10 mph (16 km/h)

Answer

30 mph (48 km/h)

Answer

40 mph (64 km/h)

Question 2

Which of the following defects requires a chain sling to be immediately removed from service?

Accepted Answer

Any chain link stretched more than 3% of its original length

Answer

Light surface rust that wipes off

Answer

Markings on the tag that are difficult to read

Answer

Minor surface nicks less than 1 mm deep

Question 3

Why is knowledge of a load's center of gravity (COG) critical before performing a rigging lift?

Accepted Answer

It ensures the load will hang level and the rigging points are correctly positioned to prevent tipping

Answer

It determines the color code for the sling to be used

Answer

It specifies the crane model required for the lift

Answer

It determines the fall protection requirements for the rigging crew

Question 4

When a tandem (two-crane) lift is required to install a wind turbine tower section, who is responsible for coordinating the movements of both cranes?

Accepted Answer

A single designated lift director who issues all movement commands

Answer

Each crane operator independently follows hand signals from separate signalers

Answer

The project manager from the wind farm owner

Answer

The manufacturer's field representative on site

Question 5

Before using a fixed lifting lug welded to a wind turbine nacelle frame, what inspection step is most critical?

Accepted Answer

Verifying the weld integrity, lug plate condition, and that the lug is rated for the intended load

Answer

Checking that the lug is painted the correct color

Answer

Confirming the lug matches the shackle manufacturer

Answer

Measuring the lug hole diameter to three decimal places

Question 6

Which type of hitch configuration is used when a sling is looped under the load and both eyes are placed on the hook, effectively doubling the contact area on the load?

Accepted Answer

Basket hitch

Answer

Choker hitch

Answer

Vertical hitch

Answer

Bridle hitch

Question 7

What type of connection method is strictly prohibited for attaching wire rope slings to a load or rigging hardware?

Accepted Answer

Knotting the wire rope

Answer

Flemish eye splice with a swaged ferrule

Answer

Mechanical sleeve termination

Answer

Loop-back with a bolt-type anchor shackle