Prize-winning Quiz on Coal Chemical Engineering Knowledge 14

1. To measure the flow rate of a liquid, the pressure tapping for an orifice flow meter should be placed at (C). A, upper part; B, lower part; C, middle part. 2. When a centrifugal pump is operating with a stable flow rate, its head should be (A) compared to the effective head required by the pipeline. A. Greater than the effective head required by the pipeline; B. The same; C. Less than the effective head required by the pipeline. 3. When the density of the medium transported by a centrifugal pump changes, the parameter that also changes is (C). A. Flow rate B. Head C. Shaft power 4. What are the contents of “three understandings and four skills”? Understanding: production principles, process flow, equipment structure ； Yes: operation, maintenance, troubleshooting of faults and handling of accidents, proper use of fire-fighting equipment and protective gear. 5. What are the maximum allowable concentrations in the air for harmful substances such as carbon monoxide, ammonia, and hydrogen sulfide? Carbon monoxide: 30mg/m3 Ammonia: 30mg/m3 Hydrogen sulfide: 10mg/m3

1. To measure the flow rate of a liquid, the pressure tap of an orifice flow meter should be placed at ( ). A, upper part; B, lower part; C, middle part. Answer: B. 2. When a centrifugal pump is operating with a stable flow rate, its head should be ( ) compared to the effective head required by the pipeline. A. Greater than the effective head required by the pipeline; B. The same; C. Less than the effective head required by the pipeline. Answer: A. 3. When the density of the medium transported by a centrifugal pump changes, which parameter also changes? ( ) A. Flow rate B. Head C. Shaft power Answer: C 4. What are the contents of “three understandings and four skills”? Answer: “Three understandings and four skills” refer to: understanding the production principles, understanding the process flow, and understanding the equipment structure; being able to operate the equipment, carry out maintenance, troubleshoot faults and handle accidents, and use fire-fighting and protective equipment correctly. 5. What are the maximum allowable concentrations in the air for harmful substances such as carbon monoxide, ammonia, and hydrogen sulfide? Answer: The maximum allowable concentration of carbon monoxide is 30 mg/m3 ； The maximum allowable concentration of ammonia is 30 mg/m3 ； The maximum allowable concentration of hydrogen sulfide is 10 mg/m3.

1. Central part of C 2. A is greater than the effective head required by the pipeline 3. C. Shaft power 4. Three understandings: understanding the production principle, understanding the process flow, and understanding the equipment structure; four skills: being able to operate the equipment, carry out maintenance, troubleshoot and handle accidents, and use fire-fighting and protective equipment correctly. 5. The maximum allowable concentration of carbon monoxide is 30 mg/m3 ； The maximum allowable concentration of ammonia is 30 mg/m3 ； The maximum allowable concentration of hydrogen sulfide is 10 mg/m3.

1、C 2、A 3、C 4、Understanding production principles, understanding the process flow, understanding equipment structure； Be able to operate, maintain, troubleshoot and handle accidents, as well as use fire-fighting equipment and protective gear correctly. 5: 30, 30, 10 mg/m3 respectively

1.B 2.A 3.C 4.Know the principles, performance, and structure; be able to read drawings, operate the equipment, carry out maintenance, and troubleshoot problems. 5.30, 30, 10 mg/m3 respectively

1. To measure the flow rate of a liquid, the pressure tap of an orifice flow meter should be placed at (B). A, upper part; B, lower part; C, middle part. 2. When a centrifugal pump is operating with a stable flow rate, its head should be (A) compared to the effective head required by the pipeline. A. Greater than the effective head required by the pipeline; B. The same; C. Less than the effective head required by the pipeline. 3. When the density of the medium transported by a centrifugal pump changes, the parameter that also changes is (C). A. Flow rate B. Head C. Shaft power 4. What are the contents of “three understandings and four skills”? Answer: “Three understandings and four skills” refer to: understanding the production principles, understanding the process flow, and understanding the equipment structure. The four skills refer to: being able to operate the equipment, maintaining it, troubleshooting and handling accidents, as well as using fire-fighting and protective equipment. 5. What are the maximum allowable concentrations in the air for harmful substances such as carbon monoxide, ammonia, and hydrogen sulfide? Answer: The maximum allowable concentration of carbon monoxide is 30 mg/m3 ； The maximum allowable concentration of ammonia is 30 mg/m3 ； The maximum allowable concentration of hydrogen sulfide is 10 mg/m3

1. To measure the flow rate of a liquid, the pressure tapping for an orifice flow meter should be placed at (B). A, upper part; B, lower part; C, middle part. 2. When a centrifugal pump is operating with a stable flow rate, its head should be (B) compared to the effective head required by the pipeline. A. Greater than the effective head required by the pipeline; B. The same; C. Less than the effective head required by the pipeline. 3. When the density of the medium transported by a centrifugal pump changes, the parameter that also changes is (C). A. Flow rate B. Head C. Shaft power 4. What are the contents of “three understandings and four skills”? \"Three understandings and four skills\" refer to the requirement that workers on the job must understand the performance of equipment, be familiar with the production process, know the techniques related to their position, and be able to read drawings, operate equipment, perform measurements, and carry out maintenance. 5. What are the maximum allowable concentrations in the air for harmful substances such as carbon monoxide, ammonia, and hydrogen sulfide? They are 30mg/m3, 30mg/m3, and 10mg/m3 respectively.

1. C: Middle part, B: Lower part. 2. A: Greater than the effective head required by the pipeline. 3. C: Shaft power. 4. Three understandings: understanding the production principle, understanding the process flow, and understanding the equipment structure; four skills: being able to operate the equipment, carry out maintenance, troubleshoot and handle accidents, and use fire-fighting and protective equipment correctly. 5. The maximum allowable concentration of carbon monoxide is 30 mg/m3 ； The maximum allowable concentration of ammonia is 30 mg/m3 ； The maximum allowable concentration of hydrogen sulfide is 10 mg/m3.

1. To measure the flow rate of a liquid, the pressure tap of an orifice flow meter should be placed at (B). A, upper part; B, lower part; C, middle part. It seems there should be two pressure-taking ports, one at the front and one at the back. 2. When a centrifugal pump is operating with a stable flow rate, its head should be (A) compared to the effective head required by the pipeline. A. Greater than the effective head required by the pipeline; B. The same; C. Less than the effective head required by the pipeline. 3. When the density of the medium transported by a centrifugal pump changes, the parameter that also changes is (C). A. Flow rate B. Head C. Shaft power 4. What are the contents of “three understandings and four skills”? Understanding: production principles, process flow, equipment structure ； Yes: operation, maintenance, troubleshooting of faults and handling of accidents, proper use of fire-fighting equipment and protective gear. 5. What are the maximum allowable concentrations in the air for harmful substances such as carbon monoxide, ammonia, and hydrogen sulfide? Carbon monoxide: 30mg/m3 Ammonia: 30mg/m3 Hydrogen sulfide: 10mg/m3 Last edited by znpmg on 2009-4-14 19:26]

1. To measure the flow rate of a liquid, the pressure tapping for an orifice flow meter should be placed at (B). A, upper part; B, lower part; C, middle part. 2. When a centrifugal pump is operating with a stable flow rate, its head should be (B) compared to the effective head required by the pipeline. A. Greater than the effective head required by the pipeline; B. The same; C. Less than the effective head required by the pipeline. 3. When the density of the medium transported by a centrifugal pump changes, the parameter that also changes is (C). A. Flow rate B. Head C. Shaft power 4. What are the contents of “three understandings and four skills”? \"Three understandings and four skills\" refer to the requirement that workers on the job must understand the performance of equipment, be familiar with the production process, know the techniques related to their position, and be able to read drawings, operate equipment, perform measurements, and carry out maintenance. In addition to fire safety, the “three understandings and three skills” require understanding (the fire hazards in the production process of one’s own position), understanding (measures to prevent fires), and understanding (methods for extinguishing fires); as well as being able to (report fires), be able to (use fire-fighting equipment), and be able to (extinguish incipient fires). 5. What are the maximum allowable concentrations in the air for harmful substances such as carbon monoxide, ammonia, and hydrogen sulfide? They are 30mg/m3, 30mg/m3, and 10mg/m3 respectively.

1. To measure the flow rate of a liquid, the pressure tap of an orifice flow meter should be placed at (B). A, upper part; B, lower part; C, middle part. 2. When a centrifugal pump is operating with a stable flow rate, its head should be (A) compared to the effective head required by the pipeline. A. Greater than the effective head required by the pipeline; B. The same; C. Less than the effective head required by the pipeline. 3. When the density of the medium transported by a centrifugal pump changes, the parameter that also changes is (B). A. Flow rate B. Head C. Shaft power 4. What are the contents of “three understandings and four skills”? Understanding: production principles, process flow, equipment structure ； Yes: operation, maintenance, troubleshooting of faults and handling of accidents, proper use of fire-fighting equipment and protective gear. 5. What are the maximum allowable concentrations in the air for harmful substances such as carbon monoxide, ammonia, and hydrogen sulfide? Carbon monoxide: 30mg/m3 Ammonia: 30mg/m3 Hydrogen sulfide: 10mg/m3

1. To measure the flow rate of a liquid, the pressure tap of an orifice flow meter should be placed at (B). A, upper part; B, lower part; C, middle part. 2. When a centrifugal pump is operating with a stable flow rate, its head should be (A) compared to the effective head required by the pipeline. A. Greater than the effective head required by the pipeline; B. The same; C. Less than the effective head required by the pipeline. 3. When the density of the medium transported by a centrifugal pump changes, the parameter that also changes is (C). A. Flow rate B. Head C. Shaft power 4. What are the contents of “three understandings and four skills”? Understanding the structure, principles, performance, and applications; knowing how to operate it, maintain it, and troubleshoot faults. 5. What are the maximum allowable concentrations in the air for harmful substances such as carbon monoxide, ammonia, and hydrogen sulfide? Carbon monoxide: 30mg/m3 Ammonia: 30mg/m3 Hydrogen sulfide: 10mg/m3

1. To measure the flow rate of a liquid, the pressure tapping for an orifice flow meter should be placed at (C). A, upper part; B, lower part; C, middle part. 2. When a centrifugal pump is operating with a stable flow rate, its head should be (A) compared to the effective head required by the pipeline. A. Greater than the effective head required by the pipeline; B. The same; C. Less than the effective head required by the pipeline. 3. When the density of the medium transported by a centrifugal pump changes, the parameter that also changes is (C). A. Flow rate B. Head C. Shaft power 4. What are the contents of “three understandings and four skills”? Understand the production principles, know the process flow, and be familiar with the equipment structure ； Be able to operate, maintain, troubleshoot and handle accidents, as well as use fire-fighting and protective equipment correctly. 5: What are the maximum allowable concentrations in the air for harmful substances such as carbon monoxide, ammonia, and hydrogen sulfide? CO: 30mg/m3 NH3: 30mg/m3 H2S: 10mg/m3

1. B 2. A 3. B 4. What is the content of “three understandings and four skills”? Answer: Three understandings: understanding the production principles, understanding the process flow, and understanding the equipment structure. Four skills: being able to operate the equipment, maintain it, troubleshoot faults and handle accidents, as well as using fire-fighting and protective equipment. 5. What are the maximum allowable concentrations in the air for harmful substances such as carbon monoxide, ammonia, and hydrogen sulfide? Answer: The maximum allowable concentration of carbon monoxide is 30 mg/m3 ； The maximum allowable concentration of ammonia is 30 mg/m3 ； The maximum allowable concentration of hydrogen sulfide is 10 mg/m3

1. To measure the flow rate of a liquid, the pressure tap of an orifice flow meter should be placed at (c). A, upper part; B, lower part; C, middle part. 2. When a centrifugal pump is operating with a stable flow rate, its head should be (a) compared to the effective head required by the pipeline. A. Greater than the effective head required by the pipeline; B. The same; C. Less than the effective head required by the pipeline. 3. When the density of the medium transported by a centrifugal pump changes, the parameter that changes as well is (c). A. Flow rate B. Head C. Shaft power 4. What are the contents of “three understandings and four skills”? Understanding the structure, the principles, and the process. Be able to operate, troubleshoot, maintain equipment, and use fire and gas protection devices. 5. What are the maximum allowable concentrations in the air for harmful substances such as carbon monoxide, ammonia, and hydrogen sulfide? 30mg/m3,30mg/m3,10mg/m3

1. To measure the flow rate of a liquid, the pressure tap of an orifice flow meter should be placed at (B). A, upper part; B, lower part; C, middle part. 2. When a centrifugal pump is operating with a stable flow rate, its head should be (A) compared to the effective head required by the pipeline. A. Greater than the effective head required by the pipeline; B. The same; C. Less than the effective head required by the pipeline. 3. When the density of the medium transported by a centrifugal pump changes, the parameter that also changes is (C). A. Flow rate B. Head C. Shaft power 4. What are the contents of “three understandings and four skills”? It means: understanding the principles, the processes, as well as the performance and structure of the equipment; being able to operate it, carry out maintenance, troubleshoot problems and handle accidents; and knowing how to use fire-fighting and protective equipment correctly. 5. What are the maximum allowable concentrations in the air for harmful substances such as carbon monoxide, ammonia, and hydrogen sulfide? The maximum allowable concentration of carbon monoxide is 30 mg/m3 ； The maximum allowable concentration of ammonia is 30 mg/m3 ； The maximum allowable concentration of hydrogen sulfide is 10 mg/m3

1. To measure the flow rate of a liquid, the pressure tapping for an orifice flow meter should be placed at (B). A, upper part; B, lower part; C, middle part. 2. When a centrifugal pump is operating with a stable flow rate, its head should be (A) compared to the effective head required by the pipeline. A. Greater than the effective head required by the pipeline; B. The same; C. Less than the effective head required by the pipeline. 3. When the density of the medium transported by a centrifugal pump changes, the parameter that also changes is (C). A. Flow rate B. Head C. Shaft power 4. What are the contents of “three understandings and four skills”? Three understandings: understanding the process flow, understanding the production principles, and understanding the performance and structure of the equipment. Four skills: knowing how to operate, know how to perform maintenance, be able to diagnose and troubleshoot faults, and know how to use protective equipment. 5. What are the maximum allowable concentrations in the air for harmful substances such as carbon monoxide, ammonia, and hydrogen sulfide? Answer: The maximum allowable concentration of carbon monoxide is 30 mg/m3 ； The maximum allowable concentration of ammonia is 30 mg/m3 ； The maximum allowable concentration of hydrogen sulfide is 10 mg/m3.