CPCS Safe Lifting Operations & LOLER 3

Question 1

What is the purpose of a crane load chart?

Accepted Answer

It shows the maximum load the crane can safely lift at different radii and boom angles

Answer

A load chart shows the crane's capacity at different radii (distances from centre of rotation) and boom configurations. Operators must always check the load chart to ensure the planned lift is within capacity.

Question 2

What is 'two-blocking' in crane operation and why is it dangerous?

Accepted Answer

When the load block is raised until it contacts the boom tip, which can cause wire rope or component failure

Answer

Two-blocking occurs when the upper and lower load blocks come together, preventing further movement. Continuing to hoist causes extreme stress, potentially snapping the wire rope and dropping the load.

Question 3

Before a crane lift, wind speed should be checked. At what approximate wind speed should most mobile crane operations be stopped?

Accepted Answer

When wind speed exceeds the manufacturer's specified limit, typically around 45-65 km/h depending on crane and load

Answer

Most crane manufacturers specify a maximum wind speed for safe operation. This varies but is typically around 45-65 km/h. Operators must check the manufacturer's specification and stop operations when this is exceeded.

Question 4

What does LOLER require regarding the competence of the appointed person for a lifting operation?

Accepted Answer

They must be competent in planning and supervising lifting operations

Answer

The appointed person must be competent specifically in planning and supervising lifting operations. This is a separate competence from operating a crane and requires specialist knowledge.

Question 5

What is a 'dynamic lift' and how does it affect the SWL?

Accepted Answer

A lift where the load is in motion (e.g. slewing with a load) — dynamic forces can reduce the effective SWL

Answer

Dynamic lifts involve movement forces that add to the static load. Most crane SWLs are based on static conditions. Dynamic loading — especially during slewing or sudden stops — can significantly increase stress on the crane and accessories.

CPCS Theory Practice Test

CPCS Theory Practice Test

CPCS Safe Lifting Operations & LOLER 3