On the loadmaster panel, where should the APU emergency controls be set?

The APU emergency controls should be set with the APU fire pull handles in. This setting indicates that the fire suppression system for the APU is armed and ready to be activated in the event of an emergency situation. By having the fire pull handles in, the crew ensures that they can respond appropriately if there is a fire in the APU; pulling the handle from this position would release the fire extinguishing agent to suppress the fire.

Understanding the context of the other choices highlights their roles in the APU's operational safety. For example, if the APU fire pull handles are out, it suggests that the fire suppression system is not armed, which could be counterproductive in an emergency. The bottle select switch needing to be off means that no suppression agent should be released under normal operation conditions, and the crew entry control being up refers to the positioning of the entry stair, which is unrelated to the emergency function of the APU. Therefore, the correct answer reflects the critical need for readiness in fire response protocols associated with the APU.