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If the jack will not be installed immediately after the hole is drilled and cased, what should be done next?

  1. Leave the hole uncovered

  2. Fill the hole with concrete

  3. Weld a cover to the top of the casing

  4. Install a temporary jack

The correct answer is: Weld a cover to the top of the casing

When drilling and casing a hole for a jack, protecting the integrity of that hole is crucial if the jack installation will not occur immediately. Welding a cover to the top of the casing is the best choice because it ensures that the opening is securely sealed, preventing any potential debris, contaminants, or water from entering the hole. This method provides a strong barrier that maintains the hole's structure and cleanliness, which is essential for the performance of the jack once it is installed. Choosing to leave the hole uncovered would expose it to the elements and increase the risk of contamination or structural damage. Filling the hole with concrete might prevent access for future installation and complicate any subsequent work that may be needed. Installing a temporary jack could lead to improper support and is unnecessary if the intention is to install the permanent jack later. Therefore, welding a cover is the most practical and effective option for safeguarding the hole until the jack can be installed.