NCCCO Digger Derrick Practice Questions - NCCCO Digger Derrick Operator (DDO) Certification Exam

Before extending the outriggers on a digger derrick, the operator must first verify that:

The truck transmission is in gear The ground supports the rated load without unacceptable settlement The boom is fully retracted toward the rear Tire pressure is at maximum rated value

Correct Answer:

The ground supports the rated load without unacceptable settlement

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