NM CID GF-4 Practice Questions - New Mexico CID GF-4 Drainage Or Flood Control Systems Contractor Examination Exam

ANSI/AWWA C150/A21.50 laying condition Type 4 for ductile-iron pipe is:

A flat-bottom trench with loose, uncompacted backfill only Pipe bedded in sand, gravel, or crushed stone to a depth of 1/8 of the pipe diameter (4-inch minimum), with backfill compacted to the top of the pipe at about 80 percent Standard Proctor (AASHTO T 99) Pipe fully encased in structural concrete for its entire length Pipe hung from pile caps with no bedding

Correct Answer:

Pipe bedded in sand, gravel, or crushed stone to a depth of 1/8 of the pipe diameter (4-inch minimum), with backfill compacted to the top of the pipe at about 80 percent Standard Proctor (AASHTO T 99)

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