Practice question

A 'follower' (or 'mandrel/follower') is used in pile driving for what purpose?

To paint the pile during driving
To extend the hammer's reach so a pile can be driven below the level the leads/hammer can otherwise reach (e.g., below water or grade)
To increase the pile's diameter
To stop the hammer from firing

Answer: B — To extend the hammer's reach so a pile can be driven below the level the leads/hammer can otherwise reach (e.g., below water or grade)

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