Risk Assessment & Mitigation Flashcards
7 cards from real MEOC practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Risk Assessment & Mitigation flashcards as text
When assessing the risk of excavating near an existing foundation, which factor is MOST important to determine?
Answer: The angle of repose and how close digging will come to the foundation's bearing zone
Digging within the bearing zone of a foundation can remove the soil support, causing settlement or structural collapse.
A toolbox talk (TBT) is conducted before each shift primarily to accomplish which risk management goal?
Answer: Communicate daily site-specific hazards and updated controls to all workers
Toolbox talks ensure every worker is briefed on current hazards, changes in conditions, and mitigation measures before work begins.
Which practice BEST reduces the risk of a rollover when operating a mini excavator on uneven terrain?
Answer: Keep the attachment low and travel perpendicular to slopes when possible
A low attachment position lowers the center of gravity, and traveling perpendicular to a slope reduces the tipping moment.
What action must an operator take if they observe a co-worker entering the exclusion zone during operation?
Answer: Stop all machine movement immediately and notify the worker and supervisor
Any unauthorized entry into the exclusion zone requires an immediate full machine stop to eliminate the struck-by hazard before work can resume.
When is it appropriate to use a 'dynamic risk assessment' on a mini excavator worksite?
Answer: Continuously throughout the shift as conditions and hazards change
Dynamic risk assessment is an ongoing mental process where operators continuously monitor for new or changed hazards as conditions evolve.
Which information is MOST critical to communicate in a handover briefing when shifts change during an excavation project?
Answer: Any new hazards discovered, changes to the work area, and incomplete mitigations
Shift handovers must transfer hazard information so incoming operators are not exposed to risks they are unaware of.
A risk matrix is used during a formal risk assessment. What two factors does it combine to determine a risk level?
Answer: Likelihood of occurrence and severity of consequences
A risk matrix plots probability (likelihood) against consequence (severity) to produce a risk rating that guides prioritization of controls.