One Question per Day on Synthetic Ammonia (Series Twelve)
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This post was last edited by 654262293 on 2016-2-15 06:36. 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 11, 56. The calibration cycle for primary energy measuring instruments is ( ). (A) Half a year (B) 1 year (C) 1 month (D) 3 months. 57. The electric heater in the synthesis tower is used intermittently; under stable operating conditions, it needs to be shut down and kept in cold standby for ( ) hours. (A) 4 (B) 8 (C) 16 (D) 24. 58. The general inspection cycle for secondary energy metering devices is ( ) years. (A) 2 (B) 1 (C) 3 (D) 4 59. The characteristics of chemical pollution are ( ). (A) Low toxicity (B) Few species (C) Minimal harm (D) High danger. 60. The main causes of environmental pollution are ( ). (A) Industrial waste gases, liquids, and solids (B) Fertilizers and pesticides (C) Urbanization (D) A, B, and C. Answer: C, B, A, D, D. The scoring scale starts at 3 points; 1 point is 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
Answer: C B A D D
This post was last edited by wang*nhua77020 on 2016-2-15 08:03: C B B D D
This post was last edited by 654262293 on 2016-2-15 at 13:29. 56. The calibration cycle for primary energy measuring instruments is ((C) 1 month). 57. The electric heater in the synthesis tower operates intermittently; it is required to be in cold standby for ((B) 8) hours during stable operation. 58. The general inspection cycle for secondary energy metering devices is ( (B) 1 ) year. 59. The characteristic of chemical pollution is ((D)) high danger). 60. The main causes of environmental pollution are ((D) A, B, and C)).
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
56. The calibration cycle for primary energy measuring instruments is (C). (A) Half a year (B) 1 year (C) 1 month (D) 3 months. 57. The electric heater in the synthesis tower operates intermittently; under stable conditions, it needs to be shut down and kept in cold standby for (B) hours. (A) 4 (B) 8 (C) 16 (D) 24. 58. The general inspection cycle for secondary energy metering devices is (A) years. (A) 2 (B) 1 (C) 3 (D) 4 59. The characteristic of chemical pollution is (D). (A) Low toxicity (B) Few species (C) Minimal harm (D) High danger. 60. The main causes of environmental pollution are (D). (A) Industrial waste gases, liquids, and solids (B) Fertilizers and pesticides (C) Urbanization (D) A, B, and C
This post was last edited by 654262293 on 2016-2-15 13:29: C B A D D
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