*Question G0B08:
What should be done before climbing a tower that supports electrically powered devices?*  

*Correct Answer is  B: Make sure all circuits that supply power to the tower are locked out and tagged*  

### AI Response: (may contain errors)  

Before climbing a tower that supports electrically powered devices, it is crucial to ensure safety by controlling the electrical hazards. Here's why the correct answer is important and why the other choices are not suitable:

1. **Correct Answer: B - Make sure all circuits that supply power to the tower are locked out and tagged**

   - **Explanation**: Lockout/tagout (LOTO) is a safety procedure used to ensure that dangerous machines are properly shut off and not started up again before the completion of maintenance or repair work. This involves locking the power source in the "off" position and tagging it to indicate that maintenance is being performed. This prevents accidental energization of the circuits, which could lead to electric shock or other injuries to the person climbing the tower.

2. **Why the Other Choices are Incorrect**:

   - **Choice A: Notify the electric company that a person will be working on the tower**
     - While notifying the electric company might be a good practice in some situations, it does not directly prevent the circuits from being energized. The electric company may not have control over the specific circuits supplying power to the tower.

   - **Choice C: Unground the base of the tower**
     - Ungrounding the tower is not a safe practice. Grounding is essential for safety as it provides a path for electrical current to safely dissipate into the earth in case of a fault. Removing the grounding could increase the risk of electric shock.

   - **Choice D: All these choices are correct**
     - Since choices A and C are not correct, this option is also incorrect.

In summary, the lockout/tagout procedure is a critical safety measure to prevent accidental energization of electrical circuits, ensuring the safety of personnel working on or near the tower.