A.≤0.5%FS
B.≤1%FS
C.≤1.5%FS
D.≤2%FS
Answer: A
Analysis: Environmentally friendly oil-free air compressors need to meet pressure fluctuations ≤0.5%FS (0.7-1.0MPa) to ensure production stability.
Answer: It is used for providing clean, oil-free compressed air for medical equipment and procedures.
A. Nitrogen purge loss B. Brand premium cost C. Advertising intensity D. Equipment appearance aesthetics Answer: A Analysis: High-end industries need to consider nitrogen purging and monitoring sampling losses.
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. Lower cost B. Simple maintenance C. Compressed air pure D. Wide application range Answer: C analysis: The advantages of oil-injected air compressors include low cost, simple maintenance and wide application range, but the compressed air has a high oil content…
A. Price and brand B. Performance, price and brand C. Service quality and reputation D. Production date and transportation method Answer: C. Service quality and credibility