In the event of an emergency with the condition lever, what should be your immediate action?

Setting the condition lever to 'Cutoff/Feather' is the appropriate immediate action in the event of an emergency involving the condition lever. This action effectively stops fuel flow to the engine, which is critical in situations where there is an engine malfunction, fire, or other serious issues that require rapid response to minimize damage and ensure safety. By feathering the propeller, drag is also reduced, which can help maintain control of the aircraft.

Responding in this way is a standard procedure that aligns with emergency engine management protocols, as it prioritizes flight safety by preventing further complications from fuel ignition or mechanical failure. The other options, such as increasing throttle or leaving the condition lever in its position, do not address the urgency of halting engine operation, and adjusting the fuel mixture may not be relevant in a sudden emergency situation where immediate action is needed.