A. Water and air cooling
B. Oil cooling and air cooling
C. Water cooling and oil cooling
D. unable to determine
Answer: A
Analysis: The cooling system of oil-injected air compressors usually includes two types: water-cooled and air-cooled, which are used to cool the compressor and compress air.
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. 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 consumes less energy and operates more efficiently, resulting in lower operating costs.
Answer: It uses water as the lubricant, eliminating the need for oil and reducing the risk of contamination.
Answer: Regular inspections of the air filter, lubrication system, and motor can help prevent premature wear and tear.