One Question per Day on Synthetic Ammonia (Series 5)
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This post was last edited by 654262293 on 2016-2-10 at 18:28. 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 4: 21. In the three-element control of boilers, ( ) is the primary element of control. (A) Water level (B) Steam (C) Feed water volume (D) Pressure 22. WHB-1 has ( ) fuel gas interlocks. (A)2 (B) 4 (C) 1 (D) 3 23. The calorific value of the vent gas is equivalent to that of CH4’s ( ). (A) 100% (B) 150% (C) 50% (D) 80% 24.) The boiler fuel gas system must control the back pressure of the burner to ensure safety and prevent ( ). (A) Deoxidation (B) Tempering (C) Overheating (D) A and B 25. Threads can be classified into ( ) types according to their purpose. (A)2 (B) 3 (C) 4 (D) 5 Answer: A B C D A The above questions are taken from \"Advanced Questions for Ammonia Synthesis Operators\"; 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 the method to hide posts, see: http://bbs.hcbbs.com/thread-1551107-1-1.html There might be a lot to do tomorrow, so I’m posting this early tonight.
21A,22B,23C,24D,25B
1. During the three-pulse control of the boiler, (A) is the main pulse. (A) Water level (B) Steam (C) Water supply volume (D) Pressure. 22. WHB-1 has (B) fuel gas interlocks. (A)2 (B) 4 (C) 1 (D) 3 23. The calorific value of the vent gas is equivalent to that of CH4’s ( C ). (A) 100% (B) 150% (C) 50% (D) 80% 24.) The boiler fuel gas system must control the back pressure of the burner to ensure safety, in order to prevent (D). (A) De-oxidation (B) Tempering (C) Overheating (D) A and B 25. Threads can be classified into (A) types according to their purpose. (A)2 (B) 3 (C) 4 (D) 5
This post was last edited by 654262293 on 2016-2-9 06:53 with an answer； A B C D A
This post was last edited by 654262293 on 2016-2-9 08:15: A B C D A
This post was last edited by 654262293 on 2016-2-9 at 14:40. 21. During the three-element control of boilers, ((A) water level)) is the primary element. 22. WHB-1 has ((A)2) fuel gas interlocks. 23. The calorific value of the vented gas is equivalent to 50% of that of CH4. 24.) The boiler fuel gas system must control the burner back pressure to ensure safety, in order to prevent ((D) A and B)). 25. Threads can be classified into ( (A)2 ) types according to their purpose.
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 4, 21. In the three-element control of boilers, (A) is the primary element. (A) Water level (B) Steam (C) Water supply volume (D) Pressure. 22. The WHB-1 has (B) fuel gas interlocks. (A)2 (B) 4 (C) 1 (D) 3 23. The calorific value of the vent gas is equivalent to that of CH4’s ( C ). (A) 100% (B) 150% (C) 50% (D) 80% 24.) The boiler fuel gas system must control the back pressure of the burner to ensure safety, in order to prevent (A, B). (A) De-oxidation (B) Tempering (C) Overheating (D) A and B 25. Threads can be classified into (A) types according to their purpose. (A)2 (B) 3 (C) 4 (D) 5