AL Tunnel Practice Questions - Alabama Tunnel Contractor Examination Exam

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Why is cast-in-place tunnel or invert concrete consolidated with vibrators (or another approved method) during placement?

To raise the water-cement ratio To create as many air pockets as possible for insulation To remove trapped air and fill around reinforcement and embedments To replace the need for specified cover

Correct Answer:

To remove trapped air and fill around reinforcement and embedments

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