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Which one of the following statements is not correct with regard to heading and hench-ing method of tunnelling.

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Which one of the following statements is not correct with regard to heading and hench-ing method of tunnelling. Answer: Firing of head holes is done just before the bench holes are fired.

Question context

This question is part of 🚧 Civil Engineering within the broader 🛠️ Engineering Essentials subject and appears in the DemoPaper-Pakistan preparation collection. Reviewing the answer together with nearby questions helps reinforce the underlying concept and identify how it may appear in competitive exams.