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. Inspect reinforced gas piping B. Replace the leaking valve C. Check or replace air valve D. These are all answers: D. all of the above are
Answer: It is mainly used in medical, food, electronics, chemical, textile, and other industries where high air quality is required.
A. Improve production efficiency B. Reduce carbon emissions C. Extend equipment life D. Reduce maintenance costs Answer: B Analysis: Environmentally friendly oil-free air compressors can reduce carbon by up to 200 tons annually, realizing additional benefits through carbon trading.
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
A. Backwardness of energy-saving technology B. Advanced energy-saving technology C. Don’t pay attention to energy-saving technologies D. General answer to energy-saving technology: B. Advanced energy-saving technology