Answer: Perform a series of tests to check the discharge pressure, capacity, and energy efficiency, and compare the results with the manufacturer’s specifications.
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. 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. Theoretical value of exhaust volume B. Actual gas production demand C. Equipment appearance size D. Brand market ranking answer: B Analysis: Selection should take actual gas production demand as the core parameter.
A. Portable air compressor B. Industrial air compressor C. Medical air compressor D. Mine air compressor Answer: A. portable air compressor
A. Weight B. Light weight C. Large D. Small size and light weight Answer: D. Small size and light weight