@air
2025-04-15
What are the compression elements of piston air compressors?
- A. screw
- B. piston
- C. centrifugal wheel
- D. scroll
- Answer: B. piston
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@air
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Which capabilities of an enterprise are mainly used to verify ISO 14064 certification?
A. Greenhouse gas emission management B. Energy Management C. Quality management D. Environmental management answer: A analysis: ISO 14064 certification is specifically used to verify the company’s greenhouse gas emissions management capabilities and support carbon exchange…
@air
2025-04-15
What are the main analytical factors for competition in the air compressor market?
A. Price and brand B. Performance, price and brand C. Market share and technological innovation D. Production date and transportation method Answer: C. Market share and technological innovation
@air
2025-04-15
2. Which of the following does not include the core influencing factors of gas production?
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.
@air
2025-04-15
What is the usual price range for small air compressors?
A. A few hundred yuan to several thousand yuan B. Thousands of yuan to tens of thousands of yuan C. Tens of thousands to hundreds of thousands of yuan D. Hundreds of thousands of yuan to several million yuan Answer: A. A few hundred yuan to several thousand yuan
@air
2025-04-15
16. Can volumetric efficiency loss be achieved in reciprocating air compressors?
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.