NPORS Plant Operator Theory Practice Questions - UK NPORS Plant Operator Theory Test (N001 N202) Exam

Why is operating heavy mobile plant close to the edge of an unsupported trench excavation dangerous?

The machine engine will stall due to lower atmospheric pressure near trench openings Hydraulic fluid temperatures rise rapidly when operating near open ground cuts The weight of the machine can cause the trench side to collapse, leading to rollover or burial Tires or tracks will wear out faster due to loose soil particles

Correct Answer:

The weight of the machine can cause the trench side to collapse, leading to rollover or burial

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