@air
2025-04-15
When can the history of air compressors go back?
- A. in 1873
- B. in 1871
- C. in 1965
- D. in 2017
Answer: A. in 1873
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@air
2025-04-15
20. What is the core basis for equipment selection?
A. Theoretical value of exhaust volume B. Actual gas production demand C. Equipment appearance size D. Brand market ranking answer: B Analysis: Selection should take actual gas production demand as the core parameter.
@air
2025-04-15
10. When selecting equipment, the comprehensive efficiency coefficient is usually taken?
A. 0.5-0.6 B. 0.7-0.85 C. 0.9-1.0 D. 1.1-1.2 Answer: B Analysis: When selecting the model, it needs to be multiplied by an efficiency factor of 0.7-0.85.
@air
2025-04-15
Using a 110kW environmentally friendly oil-free air compressor, how many tens of thousands of yuan in annual electricity bills are saved?
A. 15 B. 30 C. 45 D. 60 Answer: C Analysis: Through energy efficiency optimization, the 110kW model can save annual electricity bills of up to 450,000 yuan, directly reducing operating costs.
@air
2025-04-15
What are the main types of air compressors in the logistics industry?
A. Portable air compressor B. Industrial air compressor C. Medical air compressor D. Mine air compressor Answer: A. portable air compressor
@air
2025-04-15
The advantages of oil-injected air compressors do not include which of the following?
A. Lower cost B. Simple maintenance C. Compressed air pure D. Wide application range Answer: C analysis: The advantages of oil-injected air compressors include low cost, simple maintenance and wide application range, but the compressed air has a high oil content…