A. higher
B. lower
C. Same as injection air compressor
D. unable to determine
Answer: B
Analysis: Oil-free air compressors usually consume less energy and improve energy efficiency due to reduced use of lubricating oil.
A. Volume efficiency loss B. Air compressor brand premium C. Intake air temperature D. Filter pressure loss answer: B Analysis: Gas production is affected by mechanical efficiency, environmental factors and system matching, and has nothing to do with the brand.
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.
Answer: Follow the manufacturer’s instructions for safe shutdown procedures to avoid damage to the compressor.
A. Spraying and sandblasting operations B. Home use of C. Commercial places use D. Agricultural production uses answer: A. Spraying and sandblasting operations
Answer: It uses water lubrication and does not produce any oil-related emissions.