What should be checked before descending in a bucket truck rescue?

The correct choice emphasizes the importance of safety equipment functionality and securing a reliable point for the descent line. Before descending in a bucket truck rescue, ensuring that the descender's brake function is working properly is vital. This brake is crucial in controlling the descent speed and stopping if necessary, which directly impacts the safety of both the rescuer and the victim.

Additionally, checking the anchor point for the descent line guarantees that it is secure and can handle the weight and dynamic forces involved in the rescue operation. A faulty or inadequate anchor point could lead to disastrous consequences, compromising the stability of the descent.

While assessing the condition of the victim and surroundings, the weight of the descender, weather conditions, and having an emergency plan are also important factors, they are secondary to ensuring that the descent mechanisms are functional and secure since functioning equipment is essential for a successful and safe rescue operation.