Site Hazards & Risk Assessment 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 Site Hazards & Risk Assessment flashcards as text
A job hazard analysis (JHA) for a crane lift should be completed by whom?
Answer: A qualified team including the operator, rigger, lift director, and relevant site personnel
A comprehensive JHA requires input from all personnel involved in the lift—operator, rigger, and lift director—to identify hazards from all perspectives.
Which condition would require immediate suspension of a crane lift in progress due to a site hazard?
Answer: A sudden increase in wind speed exceeding the crane manufacturer's rated limits
Wind speeds exceeding the manufacturer's operational limits create an immediate overturning and load control hazard that requires suspending the lift.
When cranes work in proximity to one another on a congested site, what is the primary risk that must be managed?
Answer: Collision between the booms, loads, or counterweights of the cranes
When multiple cranes operate in overlapping radii, there is a real risk of boom-to-boom, load-to-load, or counterweight collision, requiring strict coordination protocols.
What does the term 'critical lift' typically indicate in crane operations?
Answer: A lift exceeding a certain percentage of the crane's rated capacity or involving unusual risk factors that requires a formal written lift plan
Critical lifts—commonly defined as lifts over 75% or 85% of rated capacity, or those involving multiple cranes or special hazards—require a detailed written lift plan reviewed by a qualified person.
What site condition requires placing timber mats or cribbing under crane outrigger pads?
Answer: When ground-bearing capacity is insufficient to support the calculated outrigger load without risk of settlement
Timber mats or cribbing spread the outrigger point load over a larger area to prevent sinking when the native soil cannot support the concentrated load directly.
During a site risk assessment, the operator identifies that the planned travel path for the crane crosses a storm drain culvert. What is the correct course of action?
Answer: Determine the culvert's load-bearing capacity before crossing and use bridging if necessary
Culverts, vaults, and other subsurface structures may not support crane loads; their capacity must be verified and bridging used if required before crossing.
What is the primary purpose of establishing a 'exclusion zone' around a crane operation?
Answer: To prevent unauthorized personnel from entering the area where they could be struck by the crane, its load, or falling objects
An exclusion zone protects workers from struck-by hazards including swinging loads, counterweights, and potential dropped or dislodged materials during crane operations.