One Question per Day on Synthetic Ammonia (Series 14)

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This post was last edited by penghh1985 on 2016-2-17 07:40. Multiple-choice question (fill in the correct option in the brackets). Continuing from Series 13, 66. (A-C-006) The main management systems for equipment include ( ). (A) Technical operating procedures (B) Shift handover system (C) Inspection system (D) A, B, and C 67. (A-C-006) The main causes of equipment accidents are poor manufacturing quality, overuse, and ( ). (A) Improper operation (B) Temperature changes (C) High precision of the workpiece (D) Weather changes. 68. During the initial heating and reduction of the medium-temperature catalyst in (B-A-001), ( ) will be released. (A) SO2 (B) H2S (C) CO2 (D) CO 69. In (B-A-001), the medium-varying catalyst exhibits certain activity in the ammonia synthesis reaction; therefore, there is ( ) PPm of NH3 in the high-varying gas. (A) 1,000 (B) 10 (C) 100 (D) 300–400 70. (B-A-001) Cobalt-molybdenum series sulfur-resistant, medium-temperature catalysts exhibit the best activity in the presence of ( ). (A) Sulfides (B) K2O (C) CO (D) Na2O 66.D 67.A 68.B 69.D 70.A Scoring criteria: 3 points for participation, 1 point for each correct answer. It should be specifically noted that respondents are required to hide their answers. If the responder is not hidden, they must participate in scoring. For methods to hide posts, see: http://bbs.hcbbs.com/thread-1551107-1-1.html