Answer: The compressor uses water instead of oil to lubricate the screw elements, eliminating the risk of oil contamination in the compressed air.
A. Dust content B. Oil content C. Dew point temperature D. Pressure fluctuations Answer: B Analysis: Oil mist emissions violate environmental regulations, and environmentally friendly oil-free air compressors combined with environmental management system certification can ensure compliance.
A. 1-3% B. 8-12% C. 15-25% D. 30-40% Answer: C Analysis: The clearance volume of reciprocating air compressor causes a 15-25% efficiency decrease.
Answer: Water lubricates the screw elements, cools the compressor, and helps to maintain optimal operating conditions.
A. Low level of protection B. High level of protection C. Low power D. High noise answer: B. high protection level
Answer: It consumes less energy and operates more efficiently, resulting in lower operating costs.