A. Annex A
B. Annex C
C. Annex D
D. Annex E
Answer: B
parsing: The exhaust volume standard corresponds to ISO 1217 Annex C.
Answer: The advantages include no oil contamination, low maintenance costs, long service life, and high energy efficiency.
A. 1-2% B. 3-5% C. 6-8% D. 10-15% Answer: B Analysis: High humidity reduces effective air volume by 3-5%.
A. Low level of protection B. High level of protection C. Low power D. High noise answer: B. high protection level
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. Input power and output power D. Production date and transportation method Answer: C. input power and output power