What is the role of avionics bay cooling in electrical system reliability, and what problems result from overheating?

• A. It uses shielding to prevent EMI; overheating is unrelated to reliability.
• B. Keeps electronics within safe temperature; overheating increases component wear, reduces reliability, and can cause faults or failures.
• C. It contributes to cabin comfort more than electronics.
• D. It reduces the need for protective relays by itself cooling.

Answer: (B)