Answer: It can be determined by observing the pressure differential indicator of the water filter or based on usage time and water quality.
A. Gas separation and storage B. Home use of C. Commercial places use D. Agricultural production uses answer: A. Gas separation and storage
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. 100 B. 300 C. 500 D. 800 Answer: D Analysis: Coating defects caused by oil pollution can cause annual losses of more than 8 million yuan for a single production line, highlighting the importance of oil-free air compressors.
Answer: Perform a series of tests to check the discharge pressure, capacity, and energy efficiency, and compare the results with the manufacturer’s specifications.
A. 1873 B. 1871 C. 1965 D. Answer in 2017: A. in 1873