A. 1 bar, 20℃, 0% humidity
B. 1 atm, 25℃, 50% humidity
C. 1.5 bar, 30℃, 30% humidity
D. 1.2 bar, 15℃, 20% humidity
Answer: A
parsing: ISO 1217 specifies the standard state as 1 bar, 20℃, 0% humidity.
A. 10-20 B. 20-30 C. 30-40 D. 40-50 Answer: C Analysis: The average annual maintenance cost of environmentally friendly oil-free air compressors is 200,000 – 300,000 yuan, which is 30-40 less than traditional models…
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…
A. Pressure and temperature B. Oil quantity and pressure C. Temperature and oil quantity D. The answer cannot be determined: A Analysis: The control system of an oil-free air compressor is mainly used to monitor and control the operating parameters of the compressor, such as pressure and temperature.
A. Stable growth B. Volatility growth C. Declining year by year D. Stagnation Answer: A. steady growth
A. <0.1ppm B. <0.01ppm C. <1ppm D. <10ppm Answer: B Analysis: According to ISO 8573-1:2010…