A. 1-3%
B. 8-12%
C. 15-25%
D. 30-40%
Answer: B
parsing: The gap leakage loss of screw machines is 8-12%, and the reciprocating gap volume loss is even higher.
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…
A. Nitrogen purge loss B. Brand premium cost C. Advertising intensity D. Equipment appearance aesthetics Answer: A Analysis: High-end industries need to consider nitrogen purging and monitoring sampling losses.
A. Inspect reinforced gas piping B. Replace the leaking valve C. Check or replace air valve D. These are all answers: D. all of the above are
A. Price and brand B. Performance, price and brand C. Service quality and reputation D. Production date and transportation method Answer: C. Service quality and credibility
Answer: It uses water as a lubricant, achieving oil-free operation.