Which methods are utilized for applying heat during composite repair?

The correct answer identifies heat blankets, ovens, or heat lamps as the appropriate methods for applying heat during composite repair. This choice is correct because these methods provide controlled and consistent heating necessary for curing composites effectively.

Composite materials often require specific temperatures to achieve proper adhesion and strength properties, and the use of controlled heat sources helps in uniformly distributing heat across the surface of the composite. Heat blankets can conform to the shape of the repair area, while ovens and heat lamps provide consistent thermal energy that can be adjusted based on the material specifications and repair requirements.

In contrast, other options do not provide the same level of effectiveness in restoring the composites. Blowers and fans might circulate air but do not generate adequate or consistent heat for curing. Relying solely on heat guns could lead to localized overheating, which can damage the composite material. Direct sunlight exposure is unpredictable due to variable environmental conditions and does not guarantee that the necessary curing temperatures are reached uniformly across the repair area.

Thus, the use of heat blankets, ovens, or heat lamps is essential for achieving the desired quality in composite repairs.