A.±0.5%
B.±1.5%
C.±2.5%
D.±5%
Answer: B
parsing: The accuracy of a flowmeter complying with GB/T 13466 standard is ±1.5%.
A. Small market share B. Few product types C. Insufficient technological innovation D. Large market share and rich product categories Answer: D. Large market share and rich product variety
A. Compressed air demand B. Industry Applications C. Budget D. Equipment life answer: A analysis: When selecting an air compressor, the primary consideration is the compressed air demand, including purity requirements and use scenarios.
A. Higher B. Lower C. Same as oil injection air compressor D. The answer cannot be determined: A Analysis: The manufacturing cost of oil-free air compressors is usually high, and the initial investment is large, but the long-term maintenance cost is low.
A. Screw B. Piston C. Centrifugal wheel D. Scroll disk answer: B. piston
A. Increase noise B. Reduce efficiency C. Intelligent and energy-saving D. Reduce maintenance Answer: C. Intelligent and energy-saving