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: Common faults include high temperature, low pressure, and motor overload.
A. General Certification B. Medical certification C. Industrial certification D. No certification required answer: B. Medical certification
A. 1-3% B. 8-12% C. 15-25% D. 30-40% Answer: B Analysis: The gap leakage loss of the screw machine is 8-12%, and the reciprocating gap volume loss is even higher.
A. Oil injection air compressor B. Oil-free air compressor C. Both can be D. The answer cannot be determined: B Analysis: The semiconductor manufacturing industry has extremely high requirements for the purity of compressed air, so oil-free air compressors are usually chosen.