MEOC Case Analysis & Practical Application 3 — Questions and Answers
Question 1: You are clearing tree stumps and encounter a root ball larger than expected, putting high hydraulic pressure on the arm. The hydraulic oil temperature warning light comes on. You should:
- Continue working but reduce bucket curl force
- Stop the heavy work cycle and allow the system to cool at low idle (Correct answer)
- Immediately shut the machine down and call for service
- Switch to a different attachment to reduce load
Correct answer: Stop the heavy work cycle and allow the system to cool at low idle
An overheating hydraulic system can lead to seal failure and fire risk; the correct response is to stop the demanding work cycle and idle the machine until temperature returns to normal.
Question 2: You are excavating in sandy, loose soil and the trench walls begin showing horizontal cracks. This indicates:
- Normal soil settlement that can be ignored
- Imminent wall failure requiring immediate evacuation and shoring (Correct answer)
- The soil is too dry and needs water added
- A good time to widen the trench to relieve pressure
Correct answer: Imminent wall failure requiring immediate evacuation and shoring
Horizontal cracks in trench walls are a primary warning sign of imminent collapse; all personnel must evacuate immediately and shoring must be installed before re-entry.
Question 3: When working in a congested urban area, a pedestrian walks into your swing radius while you are mid-rotation. What should you do?
- Sound the horn and complete the swing quickly
- Stop the swing immediately and wait for the area to clear (Correct answer)
- Rotate slowly until you can warn the pedestrian verbally
- Continue the swing above head height to avoid the pedestrian
Correct answer: Stop the swing immediately and wait for the area to clear
Any unauthorized person entering the swing radius is an immediate stop condition; the excavator must halt all motion until the hazard is resolved.
Question 4: You are loading trucks and the truck driver gets out of the cab while you are swinging a loaded bucket over the truck bed. The correct action is:
- Complete the dump cycle quickly before the driver approaches
- Immediately stop swinging and lower the bucket until the driver is clear (Correct answer)
- Warn the driver verbally and continue at a slower pace
- Dump the material and retract the bucket immediately
Correct answer: Immediately stop swinging and lower the bucket until the driver is clear
No person should ever be under or near a suspended load; stop all movement immediately whenever personnel are in the hazard zone.
Question 5: You are tasked with demolishing a small concrete wall. Before striking the wall, you should verify:
- That the wall has no paint on it
- That no utilities run through or adjacent to the wall (Correct answer)
- That the ambient temperature is above 50°F
- That the concrete mix design is known
Correct answer: That no utilities run through or adjacent to the wall
Embedded or adjacent utilities can be struck during demolition, creating electrocution, gas leak, or water damage hazards, so utility verification is mandatory.
Question 6: During operation on a client's property, you accidentally rupture an unmarked irrigation line. Your best course of action is:
- Backfill the area quickly and hope the client doesn't notice
- Stop work, document the damage, and immediately report it to the supervisor and client (Correct answer)
- Continue working and report at the end of the shift
- Attempt to repair the line yourself before reporting
Correct answer: Stop work, document the damage, and immediately report it to the supervisor and client
Any accidental damage to property or utilities must be documented and reported immediately to allow proper repair and limit liability.
Question 7: You are working on a slope rated at 3:1 (horizontal to vertical). The manufacturer's manual states the machine is rated for slopes up to 30 degrees. Is it safe to proceed?
- Yes, 3:1 slope equals exactly 30 degrees
- No, a 3:1 slope is approximately 18 degrees so it is within the limit (Correct answer)
- Yes, because 3:1 is steeper than 30 degrees
- No, any slope work requires a spotter regardless of angle
Correct answer: No, a 3:1 slope is approximately 18 degrees so it is within the limit
A 3:1 slope equals approximately 18.4 degrees, which is within the 30-degree manufacturer limit, making it safe to proceed with normal slope operating precautions.
MEOC Case Analysis & Practical Application 3
You are clearing tree stumps and encounter a root ball larger than expected, putting high hydraulic pressure on the arm.
The hydraulic oil temperature warning light comes on.
You should: