A. higher
B. lower
C. Same as injection air compressor
D. unable to determine
Answer: A
Analysis: Oil-free air compressors are usually costly to manufacture, with large initial investment, but low long-term maintenance costs.
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. Brand and model B. Color and appearance C. Production date D. Answer to transportation method: A. make and model
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…
Answer: Check for loose parts, worn components, or improper lubrication, and repair as necessary.
A. Annex A B. Annex C C. Annex D D. Annex E Answer: B Analysis: The exhaust volume standard corresponds to ISO 1217 Annex C.