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.
3. According to the ISO 1217 standard, the standard state parameter for gas production conversion is?
A. 1 bar, 20℃, 0% humidity B. 1 atm, 25℃, 50% humidity C. 1.5 bar, 30℃, 30% humidity D. 1.2 bar, 15℃,…
4. What is the formula for calculating the exhaust volume?
A. Cylinder volume × speed × number of cylinders B. Gas production × efficiency coefficient C. Theoretical exhaust volume ÷ temperature correction coefficient D. Standard state gas production × altitude correction factor Answer: A Analysis: Discharge…
5. The range of flow loss caused by leakage in rotor clearance of screw machines is usually?
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.
6. For every 1000 meters increase in altitude, the air density drops by about?
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%.
7. When the humidity is higher than 70%, condensed water separates out, resulting in a decrease in effective air volume?
A. 1-2% B. 3-5% C. 6-8% D. 10-15% Answer: B Analysis: High humidity reduces effective air volume by 3-5%.
8. For every 50 meters increase in the pipeline, the pressure drop increases by about?
A. 0.05 bar B. 0.1 bar C. 0.2 bar D. 0.5 Bar Answer: B Analysis: The pressure drop per 50 meters of pipeline increases by 0.1 bar, and the flow loss is about 2%.
9. What is the main impact of insufficient gas storage tank capacity?
A. Increase energy consumption B. Reduce noise C. Frequent start-ups and stops lead to loss D. Increase the exhaust temperature Answer: C Analysis: Insufficient capacity of the air storage tank will lead to frequent start-ups and stops of the air compressor and increase loss.
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.
11. What is the accuracy of the flowmeter recommended for energy efficiency monitoring?
A.±0.5% B.±1.5% C.±2.5% D.± 5% Answer: B Analysis: The accuracy of flow meters complying with GB/T 13466 standard is ± 1.5%.