Final answer:
Engine anti-ice systems are activated during takeoff when icing conditions such as high moisture and temperatures near freezing are present, to ensure the safety and performance of the aircraft.
Step-by-step explanation:
Yes, engine anti-ice systems may be turned on for takeoff in specific situations. Engine anti-ice is typically activated when icing conditions exist or are expected to be encountered during takeoff. These conditions are generally characterized by high moisture and temperatures close to freezing point. When engine anti-ice is activated, it heats critical areas of the engine to prevent the formation of ice, which can adversely affect engine performance and aircraft safety. The decision to use engine anti-ice during takeoff is guided by standard operating procedures and manufacturer's recommendations, ensuring that aircraft performance and safety are maintained under varying environmental conditions.