NCCCO Emergency Procedures & Accident Prevention 4

Question 1

When a crane's hydraulic system fails during a lift, what is the operator's FIRST action?

Accepted Answer

Activate the emergency stop and secure the load in place

Answer

The operator must activate the emergency stop and secure the suspended load to prevent uncontrolled movement.

Question 2

A crane operator notices the load line is vibrating excessively during a pick. This most likely indicates:

Accepted Answer

Dynamic loading or resonance that could overload the crane

Answer

Excessive load line vibration signals dynamic loading or resonance, which can create forces exceeding the crane's rated capacity.

Question 3

What does the term 'two-blocking' refer to in crane operations?

Accepted Answer

The upper and lower load blocks making contact, potentially causing sudden load drop

Answer

Two-blocking occurs when the lower block contacts the upper block or boom tip, which can cause catastrophic rope failure and sudden load drop.

Question 4

If a fire breaks out in the crane cab during operation with a load suspended, the operator should:

Accepted Answer

Lower the load to a safe position before exiting if possible without endangering personnel

Answer

If conditions allow, the operator should lower the load safely before exiting, but personal safety takes priority if the fire is spreading rapidly.

Question 5

Which condition requires an immediate crane shutdown and should be reported before resuming work?

Accepted Answer

Any structural crack observed in the crane boom or mast

Answer

Any structural crack in the boom or mast is a critical defect requiring immediate shutdown and inspection by a qualified person before resuming operations.

NCCCO (National Commission for the Certification of Crane Operators) Practice Test

NCCCO (National Commission for the Certification of Crane Operators) Practice Test

NCCCO Emergency Procedures & Accident Prevention 4