One Question per Day on Synthetic Ammonia (Series 2)

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This post was last edited by 654262293 on 2016-2-10 18:29. 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 1: 6. What are the functions of the CRT in DCS? ( ) (A) Monitoring operations (B) Printing reports (C) System configuration (D) A, B, and C. 7. All centrifugal pumps used in ammonia synthesis generally employ ( ) to regulate flow rate. (A) Variable frequency speed control (B) Check valve (C) Outlet valve (D) B and C 8. When a turbine is used as the prime mover for a pump, the steam ( ) can be changed in order to regulate the pump’s flow rate. (A) Pressure (B) Temperature (C) Flow rate (D) Superheat 9. By adjusting the speed of a centrifugal pump, it is possible to adjust its ( ). (A) Head (B) NPSH (C) Flow rate (D) Temperature. 10. The flow rate control method used in C-1 is ( ). (A) Variable frequency speed control (B) Close the outlet valve (C) Clearance valve (D) B and C. Answers: 6, D; 7, D; 8, C; 9, C; 10, D. The above questions are taken from “Advanced Questions for Ammonia Synthesis Operators”. The scoring scale starts at 3 points, with 1 point added for each correct answer. Ask the respondent to hide their answer. 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