Slinger Signaller Operations Flashcards

As the included angle between the legs of a two-leg sling increases beyond 90°, what happens to the effective working load limit on each leg?

Answer: It decreases, placing greater stress on each leg

As the sling angle increases the tension in each leg rises, effectively reducing the load the sling can safely carry; wide sling angles significantly reduce the working load limit.

Which type of lifting accessory is best suited for lifting loads with sharp edges where cutting or abrasion is a concern?

Answer: Chain sling

Chain slings are most resistant to damage from sharp edges and abrasion, making them the preferred choice when lifting steel beams or other loads with sharp corners.

What information is required to be marked on a sling's identification tag?

Answer: SWL/WLL, material, size and unique identification

LOLER requires that lifting accessories carry permanent markings or an identification tag showing their safe working load, material type, size and a unique reference for traceability.

When determining the centre of gravity of a load, why is this information critical for the slinger?

Answer: It ensures the lifting point is directly above the balance point so the load is stable and level

Positioning the hook directly above the centre of gravity ensures the load hangs level and stable during the lift, preventing dangerous swinging or tilting.

A slinger discovers that a sling has kinks, crushed strands or a missing/illegible identification tag. What must they do?

Answer: Remove it from service immediately and report the defect

Any sling showing kinks, structural damage or a missing identification tag must be immediately removed from service and reported, as its safe working load can no longer be relied upon.

Before a complex lift begins, who is responsible for producing the written lift plan?

Answer: The appointed person or lifting supervisor

The appointed person — someone with the appropriate knowledge, training and experience — is responsible for planning lifting operations, including producing the lift plan.

What reduction in the sling's rated load capacity applies when using a single-leg chain sling at a 45° angle to the vertical?

Answer: A factor of approximately 0.7 is applied, reducing capacity to about 70%

At a 45° angle to the vertical, the effective capacity of a single-leg sling is reduced by a factor of approximately 0.7 (cosine of 45°), meaning only about 70% of the rated SWL is available.