What are the two prime sources of deposits that build up on compressor blades?

Correct Answer: Option D — Lube oil mist and salt spray

Compressor blade fouling is primarily caused by the ingestion of salt spray from the marine environment and lube oil mist leaking from bearing seals. These contaminants adhere to the blades, disrupting airflow and reducing compressor efficiency. Regular water washing is required to mitigate these deposits and prevent blade corrosion.