A. high cost
B. limited application
C. maintain complex
D. Compressed air has high oil content
Answer: D
Analysis: Disadvantages of oil-free air compressors include high cost and limited scope of application, but low maintenance costs, pure compressed air and no oil content.
A. Food, drugs, electronics, chemicals B. Home use, commercial use C. Oil and gas, construction, logistics D. Manufacturing, oil and gas, construction Answer: A. Food, drugs, electronics, chemicals
A. Spraying and sandblasting operations B. Home use of C. Commercial places use D. Agricultural production uses answer: A. Spraying and sandblasting operations
Answer: It provides clean, dry compressed air for electronic manufacturing processes.
Answer: It offers superior energy efficiency, lower maintenance costs, and a longer lifespan.
A. Higher B. Lower C. Same as oil injection air compressor D. The answer cannot be determined: B Analysis: Oil-free air compressors do not need to replace lubricants and oil filters, so the maintenance cost is low.