What is the usual manufacturing cost of oil-injected air compressors?
A. higher
B. lower
C. Same as oil-free air compressor
D. unable to determine
Answer: B
Analysis: The manufacturing cost of oil-injected air compressors is usually low and the initial investment is small, making it suitable for companies with limited budgets.
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
Answer: It is used for providing clean, oil-free compressed air for medical equipment and procedures.
A. Weight B. Light weight C. Large D. Small size and light weight Answer: D. Small size and light weight
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. 1873 B. 1871 C. 1965 D. Answer in 2017: A. in 1873