MEOC Safety Procedures & Hazard Prevention 2 — Questions and Answers
Question 1: When working near an underground utility line, what is the minimum safe hand-digging clearance on each side of the marked line?
- 6 inches
- 18 inches (Correct answer)
- 3 feet
- 5 feet
Correct answer: 18 inches
Most state regulations and best practices require hand-digging within 18 inches on each side of a marked underground utility.
Question 2: A mini excavator is operating on a slope and begins to feel unstable. The FIRST action the operator should take is:
- Increase engine RPM to gain traction
- Lower the bucket to the ground to stabilize (Correct answer)
- Jump out of the cab immediately
- Rotate the upper structure to shift weight
Correct answer: Lower the bucket to the ground to stabilize
Lowering the bucket to ground contact lowers the center of gravity and provides immediate stabilization.
Question 3: Which condition makes an excavation MOST susceptible to cave-in without warning?
- Sandy or gravelly soil with no cohesion (Correct answer)
- Dry clay with visible cracking
- Wet cohesive soil with grass roots
- Compacted fill with gravel
Correct answer: Sandy or gravelly soil with no cohesion
Sandy and gravelly soils have no cohesion and can collapse suddenly under their own weight.
Question 4: Before starting a mini excavator at the beginning of a shift, the operator should:
- Start the engine and begin work immediately to warm up the machine
- Perform a walk-around inspection before starting the engine (Correct answer)
- Check fluid levels only after the engine has warmed up
- Bypass the pre-start checklist if the machine ran fine the previous day
Correct answer: Perform a walk-around inspection before starting the engine
A walk-around inspection before engine start catches visible hazards such as leaks, damage, or obstructions.
Question 5: What does a BLUE utility locate mark indicate?
- Natural gas or oil
- Potable water (Correct answer)
- Telecommunications
- Electric power lines
Correct answer: Potable water
Blue is the APWA uniform color code for potable water lines.
Question 6: When lifting a load with a mini excavator equipped with a lifting hook, the operator must ensure the load is:
- Balanced and within the machine's rated lift capacity chart (Correct answer)
- Lifted as fast as possible to minimize swing time
- Raised above the cab height before traveling
- Attached with a single chain for maximum flexibility
Correct answer: Balanced and within the machine's rated lift capacity chart
Exceeding the rated lift capacity or lifting an unbalanced load can tip the machine or damage structural components.
Question 7: A co-worker enters the swing radius of a mini excavator while it is operating. The operator should IMMEDIATELY:
- Sound the horn and continue working
- Stop all movement and wait until the worker is clear (Correct answer)
- Swing away from the worker and keep digging
- Reduce RPM but continue the current motion
Correct answer: Stop all movement and wait until the worker is clear
Any person inside the swing radius is in immediate danger; all machine movement must stop until they are clear.
MEOC Safety Procedures & Hazard Prevention 2
When working near an underground utility line, what is the minimum safe hand-digging clearance on each side of the marked line?