[Test you] Chemical production knowledge (67) - true or false questions
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true or false question: (Answer format: True, true, true, false) 1. If the gas processing capacity is large, two or more smaller cyclones can be used in series; 2. The multi-layer dust chamber is designed based on the principle that the dust-containing gas processing capacity has nothing to do with the height of the dust chamber; 3. The disc centrifuge can separate the emulsion; 4. Increasing the pipe diameter can increase the convective heat transfer film coefficient; 5. The latent heat method is used to calculate the heat transfer between fluids, which is only applicable when the phase state remains unchanged but the temperature changes. Note: 1) In this activity, each question will be worth 2 pieces of wealth, with a full score of 10 pieces of wealth. In order to encourage members to answer the questions carefully, those who get full marks will be rewarded with 1 charm point by explaining the reasons for the mistakes they think are wrong. In principle, those who do not hide or answer questions according to the format will not be graded. 2) If you answer questions from the same IP address, only the first answer is valid. In addition, please be careful when posting, editing is invalid (except for replies on the 1st floor). 3) In order to achieve the purpose of reviewing the past and learning new things, the reference answers will be announced the next day. In addition, if you have any objection to the reference answer to a certain question, you can post a thread for in-depth discussion. 4) The reply floor for this activity is limited to the 50th floor. Replies above the 50th floor will not be reviewed.
False True False False 1. If the gas processing capacity is large, two or more smaller cyclones can be used in parallel; 4. Increasing the pipe diameter cannot increase the convective heat transfer film coefficient; 5. The latent heat method is used to calculate the heat transfer between fluids, which is only applicable when the temperature remains constant but the phase state changes.
1. wrong； Parallel connection; 2. right ； 3． Wrong; cannot 4. Yes; 5. right.
1. Wrong 2. Wrong 3. Wrong 4. Wrong 5. Wrong
False True False False 1. If the gas processing capacity is large, two or more smaller cyclones can be used in parallel; 4. Increasing the pipe diameter cannot increase the convective heat transfer film coefficient; 5. The latent heat method is used to calculate the heat transfer between fluids, which is only applicable when the temperature remains constant but the phase state changes.
1 error should be connected in parallel, 2 pairs 3 errors are classified suspensions, 4 pairs 5 errors are temperature-invariant and the phase state changes.
:) 1. Wrong, correct answer: If the gas processing capacity is large, two or more smaller cyclones can be used in parallel. ； 2. Yes ； 3. Yes ； 4. Wrong, correct answer: Increasing the pipe diameter cannot increase the convective heat transfer film coefficient ； Generally, the convective heat transfer film coefficient can be improved by using a multi-tube structure, installing baffles in the shell side, or opening some longitudinal grooves on the tube wall during condensation. ； 5. Wrong, correct answer: The latent heat method is used to calculate the heat transfer between fluids, which is only applicable when the temperature remains constant but the phase state changes.
1. Wrong, correct answer: If the gas processing capacity is large, two or more smaller cyclones can be used in parallel. ； 2. Yes ； 3. Yes ； 4. Wrong, correct answer: Increasing the pipe diameter cannot increase the convective heat transfer film coefficient ； 5. Wrong, correct answer: The latent heat method is used to calculate the heat transfer between fluids, which is only applicable when the temperature remains constant but the phase state changes.