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
During risk mitigation planning, the hierarchy of controls places which option as the MOST effective?
Answer: Engineering controls / elimination
Elimination and engineering controls are at the top of the hierarchy because they remove or physically isolate the hazard rather than relying on human behavior.
A mini excavator operator detects a strong sulfur smell while digging. What is the most likely hazard and correct response?
Answer: Stop digging, evacuate the area, and call the gas company
Sulfur smell indicates a natural gas or sewer gas leak; the operator must stop, evacuate, and notify the utility immediately to prevent ignition.
Which document should be consulted to understand the specific risks associated with a fuel or hydraulic fluid spill from a mini excavator?
Answer: Safety Data Sheet (SDS) for the fluid
Safety Data Sheets provide hazard information, first aid measures, and spill response procedures for hazardous substances.
What is the safest procedure when a mini excavator must travel across a soft, wet field before beginning work?
Answer: Conduct a ground bearing assessment and use mats or plates if needed
Ground bearing assessment followed by steel mats or timber pads spreads the machine's weight and prevents sinkage or tipping.
What type of risk is introduced when multiple trades are working in close proximity to an excavator on the same jobsite?
Answer: Increased struck-by and caught-between hazards
Multiple workers near an operating excavator exponentially increase struck-by and caught-between risks due to blind spots and swing radius overlap.
A risk assessment reveals that an excavation will be deeper than 4 feet. Under OSHA regulations, what must be implemented before workers enter?
Answer: A shoring, sloping, or trench box protective system
OSHA 29 CFR 1926.652 requires a protective system (shoring, sloping, or shield) for excavations deeper than 5 feet, and assessment at 4 feet.
Which scenario represents a residual risk that remains AFTER mitigation controls have been applied?
Answer: The remaining level of risk after all practical controls are in place
Residual risk is the remaining exposure after all feasible controls have been implemented; it must be documented and accepted or further reduced.