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This post was last edited by hesonchang214 on 2021-4-26 at 17:34. 89. For pressure gauges used to measure ammonia pressure, the Bourdon tube cannot be made of ( ) material. A. Stainless steel B. Steel C. Copper D. Iron 90. A certain automatic control system uses a proportional-integral controller, and someone employs a trial-and-error method starting with proportionality and then adding integration to tune the parameters of the controller. If, under pure proportional action, the value of the gain is already fairly appropriate, then when integration is added, ( ). A. The proportionality should be **reduced.** B. The proportionality should be appropriately reduced. C. The proportionality should be appropriately increased. D. There is no need to change the proportionality. 91. If it is required by the process to measure a temperature of 950°C, and the measurement results are to be transmitted for display, then the suitable measuring elements and display instruments are ( ). A. Thermal resistor with an electronic balance bridge B. Thermocouple with an electronic potentiometer C. Thermal resistor with a moving-coil meter XCZ—102 D. Thermocouple with a moving-coil meter XCZ—10192. When installing an orifice plate on a pipe, if it is installed in the wrong direction, it will cause ( ). A. Reverse indication of the differential pressure gauge B. Decrease in the indication of the differential pressure gauge C. Increase in the indication of the differential pressure gauge D. No effect on the indication of the differential pressure gauge. CCDB: If you feel that the given answers are incomplete or inaccurate, feel free to share your insights! Please set replies to be visible only to the responder. If not set, no scoring will be performed. (Second edits do not count.) How to hide it: http://down1.hcbbs.com/forum/201511/09/204010yjbf8w8jw4hou8t3.png.thumb.jpg Moderator scoring rules: Active participation +4 wealth (already set by the system); answering two questions correctly +8 wealth; in-depth discussion +10 wealth. Once the next post is published, replies to this post will be closed; it will be available only for reading. These posts in this series will not be pinned or highlighted!
89. For a pressure gauge used to measure ammonia gas, its Bourdon tube cannot be made of (C) material. A. Stainless steel B. Steel C. Copper D. Iron 90. A certain automatic control system uses a proportional-integral controller, and someone employs a trial-and-error method starting with proportionality and then adding integration to tune the parameters of the controller. If, under pure proportional action, the value of the gain is already fairly appropriate, then when integration is added, (B) occurs. A. The proportionality should be **reduced.** B. The proportionality should be appropriately reduced. C. The proportionality should be appropriately increased. D. There is no need to change the proportionality. 91. If it is required by the process to measure a temperature of 950°C, and the measurement results are to be displayed remotely, the suitable measuring element and display instrument are (D). A. Thermal resistor with an electronic balance bridge B. Thermocouple with an electronic potentiometer C. Thermal resistor with a moving-coil meter XCZ—102 D. Thermocouple with a moving-coil meter XCZ—10192. When installing an orifice plate in a pipeline, if it is installed in the wrong direction, it will cause (B). A. Reverse indication of the differential pressure gauge B. Decrease in the differential pressure gauge reading C. Increase in the differential pressure gauge reading D. No effect on the differential pressure gauge reading
Spicy buns are plentiful, but mustard is hard to find. 89. For a pressure gauge used to measure ammonia gas, its spring tube cannot be made of (c) material. A. Stainless steel B. Steel C. Copper D. Iron. Ammonia, acetylene, and copper can undergo chemical reactions, leading to medium leakage and safety accidents. Iron isn’t right either; in a narrow sense, iron does not deform. A certain automatic control system uses a proportional-integral controller, and someone used a trial-and-error approach starting with proportionality and then adding integration to tune the parameters of the controller. If, under pure proportional action, the value of the gain is already fairly appropriate, then when integration is added, it becomes (b). A. The proportionality should be **reduced.** B. The proportionality should be appropriately reduced. C. The proportionality should be appropriately increased. D. There is no need to change the proportionality. 91. If it is required by the process to measure a temperature of 950°C, and the measurement results are to be displayed remotely, the suitable measuring element and display instrument are (A). A. Thermal resistor with an electronic balance bridge B. Thermocouple with an electronic potentiometer C. Thermal resistor with a moving-coil meter XCZ—102 D. Thermocouple with a moving-coil meter XCZ—101. Guessing randomly. 92. When installing an orifice plate on a pipe, if it is installed in the wrong direction, it will cause (b). A. Reverse indication of the differential pressure gauge B. Decrease in the differential pressure gauge reading C. Increase in the differential pressure gauge reading D. No effect on the differential pressure gauge reading
89. For a pressure gauge used to measure ammonia gas, its Bourdon tube cannot be made of (C) material. A. Stainless steel B. Steel C. Copper D. Iron 90. A certain automatic control system uses a proportional-integral controller, and someone employs a trial-and-error method starting with proportionality and then adding integration to tune the parameters of the controller. If, under pure proportional action, the value of the gain is already fairly appropriate, then when integration is added, (B) occurs. A. The proportionality should be **reduced.** B. The proportionality should be appropriately reduced. C. The proportionality should be appropriately increased. D. There is no need to change the proportionality. 91. If it is required by the process to measure a temperature of 950°C, and the measurement results are to be transmitted for display, the suitable measuring element and display instrument are (C). A. Thermal resistor with an electronic balance bridge B. Thermocouple with an electronic potentiometer C. Thermal resistor with a moving-coil meter XCZ—102 D. Thermocouple with a moving-coil meter XCZ—10192. When installing an orifice plate in a pipeline, if it is installed in the wrong direction, it will cause (D). A. Reverse indication of the differential pressure gauge B. Decrease in the differential pressure gauge reading C. Increase in the differential pressure gauge reading D. No effect on the differential pressure gauge reading
89. For a pressure gauge used to measure ammonia gas, its Bourdon tube cannot be made of (C) material. A. Stainless steel B. Steel C. Copper D. Iron 90. A certain automatic control system uses a proportional-integral controller, and someone employs a trial-and-error method starting with proportionality and then adding integration to tune the parameters of the controller. If, under pure proportional action, the value of the gain is already fairly appropriate, then when integration is added, (C). A. The proportionality should be **reduced.** B. The proportionality should be appropriately reduced. C. The proportionality should be appropriately increased. D. There is no need to change the proportionality. 91. If it is required by the process to measure a temperature of 950°C, and the measurement results are to be displayed remotely, the suitable measuring element and display instrument are (D). A. Thermal resistor with an electronic balance bridge B. Thermocouple with an electronic potentiometer C. Thermal resistor with a moving-coil meter XCZ—102 D. Thermocouple with a moving-coil meter XCZ—101. 92. When installing an orifice plate on a pipe, if it is installed in the wrong direction, it will cause (B). A. Reverse indication of the differential pressure gauge B. Decrease in the differential pressure gauge reading C. Increase in the differential pressure gauge reading D. No effect on the differential pressure gauge reading
This post was last edited by 870471450 on 2015-12-12 11:10: C B C B
http://bbs.hcbbs.com/static/image/hrline/3.gif 89． C. Copper 90．B. The scale factor should be reduced appropriately 91．D. Thermocouple coupled with moving-coil meter XCZ-101 92．B. The differential pressure gauge shows a smaller reading
89. For a pressure gauge used to measure ammonia gas, its Bourdon tube cannot be made of (C) material. 90. A certain automatic control system uses a proportional-integral controller, and someone employed a trial-and-error method starting with proportionality and then adding integration to tune the parameters of the controller. If, under pure proportional action, the value of the gain is already fairly appropriate, then when integration is added, (C). 91. If the process requires temperature measurement at 950°C and the measurement results need to be transmitted for indication, the applicable measuring elements and display instruments are (D). 92. When installing an orifice plate on a pipe, if it is installed in the wrong direction, it will cause (B).