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

Why are mechanical excavators forbidden from digging directly above marked high-voltage underground electricity cables?

Bucket teeth can easily penetrate cable insulation, causing fatal electrical flashover or explosive arcing Excavator tracks disrupt underground cable fiber optic data signals Diesel exhaust fumes degrade underground cable outer plastic sheathing Machine magnetic fields cause circuit breakers to trip at local sub-stations

Correct Answer:

Bucket teeth can easily penetrate cable insulation, causing fatal electrical flashover or explosive arcing

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