CPCS Crane Operations and Signals 2

Question 1

When a crane is lifting a load and the wind speed increases, what effect does this have on the operation?

Accepted Answer

It increases the dynamic loading on the crane and can cause the load to swing dangerously

Answer

No effect as cranes are designed for all weather

Answer

It only affects the operator's comfort in the cab

Answer

It improves the crane's lifting capacity

Question 2

What does the term 'duty chart' or 'load chart' refer to on a crane?

Accepted Answer

A table showing the maximum safe load the crane can lift at various radii and boom lengths

Answer

A maintenance schedule for the crane

Answer

A log of all lifts carried out by the crane

Answer

The crane's insurance documentation

Question 3

Who is the 'Appointed Person' in a crane lifting operation under BS 7121?

Accepted Answer

The person responsible for planning and directing the lifting operation

Answer

The crane driver only

Answer

The site security guard

Answer

The person who hired the crane

Question 4

What must a slinger/signaller verify about the load before attaching slings?

Accepted Answer

The weight of the load, its centre of gravity, and the condition of lifting accessories

Answer

The colour of the load

Answer

The manufacturer's logo on the load

Answer

Whether the load has been on site for more than a week

Question 5

What is the minimum safe clearance distance that should be maintained between a crane and 400kV overhead power lines?

Accepted Answer

15 metres

Answer

3 metres

Answer

6 metres

Answer

9 metres

Question 6

What does it mean when a crane's hook block is 'two-blocked'?

Accepted Answer

The hook block has contacted the boom tip sheaves, creating a dangerous condition

Answer

The hook is carrying two loads simultaneously

Answer

The hook is fitted with two safety catches

Answer

The crane has been parked with two wheel chocks