NM CID GF-3 Practice Questions - New Mexico CID GF-3 Canals, Reservoirs Or Irrigation Systems Contractor Examination Exam

Flexible irrigation pipe (PVC or HDPE) is backfilled and then checked with a mandrel or deflection gauge because:

Deflection greater than the specified limit means the pipe-zone support is inadequate All flexible pipe is required to oval at least 15 percent Mandrels measure air content of concrete Deflection replaces the hydrostatic pressure test

Correct Answer:

Deflection greater than the specified limit means the pipe-zone support is inadequate

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