Emergency Procedures & Accident Prevention Flashcards
7 cards from real NCCCO practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Emergency Procedures & Accident Prevention flashcards as text
When a crane's hydraulic system fails during a lift, what is the operator's FIRST action?
Answer: Activate the emergency stop and secure the load in place
The operator must activate the emergency stop and secure the suspended load to prevent uncontrolled movement.
A crane operator notices the load line is vibrating excessively during a pick. This most likely indicates:
Answer: Dynamic loading or resonance that could overload the crane
Excessive load line vibration signals dynamic loading or resonance, which can create forces exceeding the crane's rated capacity.
What does the term 'two-blocking' refer to in crane operations?
Answer: The upper and lower load blocks making contact, potentially causing sudden load drop
Two-blocking occurs when the lower block contacts the upper block or boom tip, which can cause catastrophic rope failure and sudden load drop.
If a fire breaks out in the crane cab during operation with a load suspended, the operator should:
Answer: Lower the load to a safe position before exiting if possible without endangering personnel
If conditions allow, the operator should lower the load safely before exiting, but personal safety takes priority if the fire is spreading rapidly.
Which condition requires an immediate crane shutdown and should be reported before resuming work?
Answer: Any structural crack observed in the crane boom or mast
Any structural crack in the boom or mast is a critical defect requiring immediate shutdown and inspection by a qualified person before resuming operations.
During a pick near an energized power line, the load suddenly swings toward the line. The operator should:
Answer: Hold position and warn workers on the ground to stay back
The operator should hold position to avoid erratic movements while warning ground personnel to stay clear until the load can be safely controlled.
What is the purpose of a crane's anti-two-block (ATB) device?
Answer: It automatically stops the hoist when the load block approaches the boom tip
The ATB device automatically stops hoist-up and boom-down functions when the load block is within a set distance of the boom tip to prevent two-blocking.