Practice question

Pile driving is often accepted when the pile reaches a specified blow count or 'refusal.' That measurement is used as a field indicator of:

  1. The slump of the pile concrete only
  2. Driving resistance, which is correlated with bearing capacity or a minimum tip elevation
  3. The APWA color of a nearby utility
  4. Whether Virginia 811 was notified

Answer: B — Driving resistance, which is correlated with bearing capacity or a minimum tip elevation

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