A. higher
B. lower
C. Same as injection air compressor
D. unable to determine
Answer: B
Analysis: Oil-free air compressors do not require replacement of lubricants and oil filters, so maintenance costs are low.
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.
A. Increase energy consumption B. Reduce noise C. Frequent start-ups and stops lead to loss D. Increase the exhaust temperature Answer: C Analysis: Insufficient capacity of the air storage tank will lead to frequent start-ups and stops of the air compressor and increase loss.
Answer: It can be determined by observing the pressure differential indicator of the water filter or based on usage time and water quality.
A. Price and brand B. Performance, price and brand C. Viscosity and quality of lubricating oil D. Production date and transportation method Answer: C. Viscosity and quality of lubricating oil
Answer: Common faults include high temperature, low pressure, and motor overload.