A. semiconductor manufacturing
B. food production
C. building construction
D. pharmaceutical industry
Answer: C
Analysis: Due to the high oil content of compressed air, oil-injected air compressors are usually used in occasions where the purity of compressed air is not high, such as construction.
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. High energy consumption B. Low energy consumption and high efficiency C. Maintaining complex D. High noise answer: B. Low energy consumption and high efficiency
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. 50% B. 60% C. 75% D. 80% answer: C analysis: Environmentally friendly oil-free air compressors reduce oil pollution, thereby reducing the frequency of filter replacement and optimizing maintenance costs.
A. 5-7 Year B. 7-10 Year C. 10-12 Year D. 12-15 Answer: C analysis: Environmentally friendly oil-free air compressor adopts a fully enclosed design, and the equipment life can reach 10-12 years, far exceeding traditional oily lubrication…