What kind of certification does environmentally friendly oil-free air compressors need to pass to prove their oil-free performance?

A. Stable growth B. Volatility growth C. Declining year by year D. Stagnation Answer: A. steady growth

A. 0.5-0.6 B. 0.7-0.85 C. 0.9-1.0 D. 1.1-1.2 Answer: B Analysis: When selecting the model, it needs to be multiplied by an efficiency factor of 0.7-0.85.

A. Price and brand B. Performance, price and brand C. Market demand and technological development D. Production date and transportation method Answer: C. Market demand and technological development

Answer: Follow the manufacturer’s instructions for pipe sizing, connections, and routing.

A. Improve the purity of compressed air B. Reduce equipment noise C. Cooling and lubricating parts D. Increase equipment life Answer: C Analysis: The water-lubricated design of oil-free air compressors is mainly used to cool and lubricate compressor components to ensure…