Air Separation Technology Section [Daily Question] 2012.1.13 (Friday)

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This post was last edited by hxm2087 on 2012-1-13 08:47. Today’s 【Daily Question】 regarding the air separation oxygen production process: 1. Turbine expanders usually regulate the flow rate by changing the ( ) of the nozzle blades. A. Height B. Angle C. Diameter D. Size 2. In a turbine expander, the so-called reaction degree refers to the process of expansion of the working fluid in ( ). A. Shell B. Nozzle C. Working wheel D. Diffuser 3. It is known that the maximum operating pressure of a certain air-cooled tower is 0.57 MPa, while its design pressure is 0.7 MPa. What should be the setting for the pressure at which the outlet safety valve opens? A. 0.55 MPa B. 0.63 MPa C. 0.7 MPa D. 0.73 MPa Notes: 1. The purpose of this activity is to review the knowledge we have already learned, and to improve and strengthen everyone’s fundamental theoretical knowledge as they answer the questions, thereby reinforcing what they already know and helping them recall what they have forgotten ； 2. Please be sure to hide your replies! Hide method address. A reply that is not hidden is considered an invalid reply ； 3. Effective participation earns 2 wealth points; getting two answers correct grants 4 wealth points, while correct answers yield 6 wealth points. Those who provide a brief analysis may receive an additional 1–5 wealth points at the moderator’s discretion. Points will be deducted for irrelevant comments, and each reply can only be rated once. Any invalid ratings should be revoked by the respective moderators ； 4. Do not edit after replying; editing after replying will only earn you 2 wealth points as a reward ； 5. Be sure to set the reply to be visible when responding; otherwise it will be deleted ； 6. Members who have any objections to the questions can contact me via private message to discuss them ； 7. The answer will be announced in the next issue ； 8. Answers from the previous issue: air purification system, refining system, instrument control system 9. Link to the previous issue