NCCCO Drill Rig Practice Questions - NCCCO Drill Rig Operator (DRO) Certification Exam

The mast pin and head holder on a foundation drill rig should be inspected for:

Paint touch-up only Cracks, deformation, missing retaining hardware, and wear Correct serial-number alignment Manufacturer's signature stamp

Correct Answer:

Cracks, deformation, missing retaining hardware, and wear

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