A. water-lubricated
B. oil lubrication
C. no lubrication
D. Lubrication with special lubricants
Answer: D
Analysis: Oil-free air compressors usually use special lubricants to cool and lubricate parts to ensure the purity of the compressed air.
Answer: It adopts an efficient compressor design, optimized system control, and water lubrication technology to reduce energy consumption and improve efficiency.
Answer: First, check the fault indicator lights and alarm messages, and troubleshoot and handle according to the prompts. If the problem cannot be solved independently, contact professional maintenance personnel promptly.
A. Inspect reinforced gas piping B. Replace the leaking valve C. Check or replace air valve D. These are all answers: D. all of the above are
Answer: Common faults include high temperature, low pressure, and motor overload.
A. Oil injection air compressor B. Oil-free air compressor C. Both can be D. The answer cannot be determined: A Analysis: Oil injection air compressors have low initial investment and are suitable for companies with limited budgets.