A. oil injection air compressor
B. oil free compressor
C. both can
D. unable to determine
Answer: A
Analysis: Oil injection air compressors have low initial investment and are suitable for companies with limited budgets.
Answer: It can monitor parameters such as discharge pressure, temperature, motor current, and lubrication water level.
Answer: Check for loose parts, worn components, or improper lubrication, and repair as necessary.
Answer: The GWL Series compressor can use either air-cooling or water-cooling methods, depending on the model and operating conditions.
A. Low level of protection B. High level of protection C. Low power D. High noise answer: B. high protection level
Answer: Perform a series of tests to check the discharge pressure, capacity, and energy efficiency, and compare the results with the manufacturer’s specifications.