A.±0.5% B.±1.5% C.±2.5% D.± 5% Answer: B Analysis: The accuracy of flow meters complying with GB/T 13466 standard is ± 1.5%.
A. Wear of cylinder head and air liner B. Piston and piston rod damage C. Valve assembly failure D. These are all answers: D. all of the above are
A. Industry, energy, construction, mining B. Home use, commercial use C. Oil and gas, construction, logistics D. Manufacturing, oil and gas, construction Answer: A. Industry, energy, construction, mining
A. Compressed air pure B. Low manufacturing cost C. Simple maintenance D. Low energy consumption Answer: A Analysis: The main reason why the food production industry chooses oil-free air compressors is that its compressed air is pure and meets the hygiene requirements of food production…
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.