Answer: The main features include energy efficiency, low pressure operation, oil-free water lubrication, and high reliability.
A. 5% B. 11% C. 20% D. 30% answer: B Analysis: For every 1000 meters increase in altitude, the air density drops by about 11%.
Answer: They provide consistent, high-quality compressed air for textile manufacturing and laboratory applications.
Answer: Regular inspections of the air filter, lubrication system, and motor can help prevent premature wear and tear.
A. 1-3% B. 8-12% C. 15-25% D. 30-40% Answer: C Analysis: The clearance volume of reciprocating air compressor causes a 15-25% efficiency decrease.
Answer: It uses water as a lubricant, achieving oil-free operation.