A. higher
B. lower
C. Same as injection air compressor
D. unable to determine
Answer: B
Analysis: Oil-free air compressors usually consume less energy and improve energy efficiency due to reduced use of lubricating oil.
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.
Answer: Connect the compressor to a network and use a web-based interface or mobile app to monitor and control it remotely.
Answer: It uses a water-cooled system to maintain optimal operating temperatures.
A. 1873 B. 1871 C. 1965 D. Answer in 2017: A. in 1873
Answer: Common faults include high temperature, low pressure, and motor overload.