One Question per Day on Synthetic Ammonia (Series 2**)
Thread Content
Since the moderator penghh1985 (account number 565765) is busy, I will be handling the recent issues. I. Multiple-choice questions (each question has 4 options, of which only 1 is correct; fill in the correct option in the brackets). Continuing from Series 27, 136. (B-B-012) In industry, a common concentration method involves heating a dilute solution to boiling point so that part of the solvent vaporizes; this method is called ( ). (A) Absorption (B) Regeneration (C) Evaporation (D) Drying 137. (B-B-013) The most widely used type of demister is of the ( ) type. (A) Screen (B) Cyclone (C) Baffle (D) Centrifugal 138. (B-B-013) A baffle type demister is equipped with ( ). (A) Drain line (B) Return line (C) Purge line (D) Steam line 139. (B-B-013) The demister at the top of the T-2 unit in a small ammonia synthesis plant that uses natural gas as raw material is ( ). (A) Screen type (B) Centrifugal type (C) Counterflow type (D) Spherical 140. (B-B-014) The adsorption medium commonly used in the instrument air compressor station is ( ). (A) Silica gel (B) Al2O3 (C) Molecular sieve (D) Diatomite Answer: C B B A B. The scoring starts at 3 points, with 1 point added for each correct answer. It should be specifically noted that respondents are required to hide their answers. If the answerer’s score is not hidden, it is halved. For methods to hide posts, see: http://bbs.hcbbs.com/thread-1551107-1-1.html
This post was last edited by 654262293 on 2016-3-2 19:14: C A B A B ~~~~~~~~~~
It should be specifically noted that respondents are required to hide their answers. If the answerer’s score is not hidden, it is halved. For methods to hide posts, see: http://bbs.hcbbs.com/thread-1551107-1-1.html
This post was last edited by Thank goodness you're here on 2016-3-3 07:58: C B B A B
Answer: C B B A B
136. (B-B-012) The industrial method commonly used to concentrate dilute solutions by heating them to boiling point so that part of the solvent vaporizes is called (C). (A) Absorption (B) Regeneration (C) Evaporation (D) Drying 137. (B-B-013) The most widely used type of demister is of the (B) type. (A) Screen (B) Cyclone (C) Baffle (D) Centrifugal 138. (B-B-013) A baffle type demister is equipped with (B). (A) Drain line (B) Return line (C) Purge line (D) Steam line 139. (B-B-013) The top demister in the small ammonia synthesis plant using natural gas as raw material, T-2, is (A). (A) Screen type (B) Centrifugal type (C) Counterflow type (D) Spherical 140. (B-B-014) The adsorbent material commonly used in the instrument air compressor station is (B). (A) Silica gel (B) Al2O3 (C) Molecular sieve (D) Diatomite
This post was last edited by 654262293 on 2016-3-3 08:20: C B B A B