I hope everyone can provide some exam **questions** related to coking
Thread Content
This post was last edited by Desert Poplar on February 27, 2011, at 21:54. Our organization has been making great efforts in talent cultivation recently. As an outsider to this industry, I’m facing many difficulties. I hope everyone can provide some exam *questions related to coking.
Go to another unit for a period of internship, and then turn the operating procedures into fill-in-the-blank questions, multiple-choice questions, and true/false questions. Treat the problems that arise during daily operations as questions for exams. Laypeople can ask workers to create their own test questions. Then, combine all the questions and select those that cover more difficult and commonly encountered concepts for the actual exam. The results are quite noticeable. We’ve done something similar before; you’ll definitely be able to complete the task with both quality and efficiency! !
Just create questions according to the operating procedures
Additionally, there are various learning* materials in textbooks; once you’ve organized the training, they can be used as examination materials for everyone.
I. Fill-in-the-blank questions (2 points per blank, 30 points in total) 1. Currently, the coke ovens in our plant are of the AG60-06F type. Each coke oven has () carbonization chambers and () combustion chambers. 2. Coke oven gas is a mixture of various components; among them, hydrogen is the most abundant component, followed by (). 3. The temperature at the center of the coke cake is generally controlled at () °C. 4. The refractory mortars used for coke ovens are divided into two main categories: silica mortar and clay mortar. Among them, silica mortar is further categorized into () silica mortar, () silica mortar, and () silica mortar. 5. The main types of coal used in coke-making blending are (), (), () , (), and there are also gas-fat coal, 1/3 coking coal, etc. 6. The crude gas extraction equipment includes (), (), (), (), suction pipes, etc. II. Multiple-choice questions (3 points per question, total 60 points) 1. To prevent high-temperature accidents, the maximum temperature at the bottom of the vertical flue should not exceed ( ) °C. A. 1350 B. 1410 C. 1450 D. 1500 2. The characteristics of coke oven gas include ( ). A. High calorific value B. Short combustion flame C. Slow combustion speed D. Long combustion flame 3. The factors affecting the stability coefficient are ( ). A. Moisture content of coal fed into the furnace
B. Pressure in the gas collection pipe
C. Coke discharge not carried out as planned
D. Ambient temperature
4. When two gases with densities ρ1 and ρ2 are mixed, what is their average density? A. (ρ1 + ρ2)/2 B. 2ρ1ρ2/(ρ1 + ρ2) C. (ρ1ρ2)^0.5 D. Impossible to calculate 5. Besides being related to the furnace type, the standard temperature is also related to ( ). A. Moisture content of coal
B. Type of heating gas
C. Pressure in the collecting main
D. Turnaround time
6. Within the same coking time, for every 10°C change in the standard temperature, the temperature at the center of the coke cake changes by ( ) °C accordingly. A. 7–8 B. 25–30 C. 50–60 D. Indeterminate 7. The time that coal stays in the carbonization chamber during the coking process is called ( ). A. Coking time B. Turnaround time C. Operating time D. Maintenance time 8. The basis for determining the standard coking temperature is ( ). A. Temperature of the collecting main B. Temperature at the top of the regenerator C. Temperature in the vertical flue D. Temperature at the center of the coke cake 9. Among the main quality indicators for furnace columns, the degree of bending prior to installation can be ( ) adjusted. A. 5–10 mm B. No more than 5 mm C. At least 5 mm D. No requirements 10. Among coking coals, which type of coal has the best caking properties? A. Gas coal B. Rich coal C. Coking coal D. Lean coal 11. Adhering to the principle of “whoever cuts off the power/whoever restores it” is mainly to ( ). A. Equipment safety B. Personal safety C. No abandonment of post 12. To prevent cracking due to drastic changes in the volume of the coke oven masonry, after coal charging, the temperature of the furnace wall must not drop below ( ) °C. A. 1000 B. 900 C. 800 D. 700 13. What represents the average temperature of the entire furnace? A. Straight-way temperature B. Transverse-row temperature C. Furnace head temperature D. Ambient temperature 14. ( ) is used to check the thermal efficiency of the coke oven and to determine whether there are any leaks in the main walls of the regenerator. A. Temperature of small flue B. Temperature at the top of the regenerator C. Temperature in the straight flue D. Temperature of branch flues 15. Coke with a particle size greater than ( ) mm is referred to as metallurgical coke. A. 25 B. 40 C. 60 D. 80 16. The checker bricks in the regenerator are ( ). A. Clay bricks B. High-alumina bricks C. Silica bricks D. Quarry tiles 17. The temperature of the raw coal gas in the collecting main should be around ( ) °C. A. 50 B. 90 C. 700 D. 800 18. To enable precise positioning of the coke pusher, large-capacity coke ovens employ the ( ) pushing sequence. A. 2-1 B. 5-2 C. 9-2 D. All of the above 19. When the riser tube cover is opened, black smoke emerges from the fire. The coke cake appears dark red in color, and the gaps between the walls of the carbonization chamber are small. This indicates that ( ). A. Under-coked B. Properly coked C. Over-coked D. None of the above 20. The quality indicators for coal blending in coke making include ( ). A. Carbon content B. Ash content C. Particle size D. Calorific value
III. True or False Questions (2 points per question, total 30 points)
1. The main factors determining the quality of coke are threefold: the quality and blending of coking coal, the pretreatment of coal before coking, and the coking process itself. ( ) 2. The amount of inert gases contained in blast furnace gas is less than that in coke oven gas. ( ) 3. Generally, materials with a refractoriness of 1200°C or higher are referred to as refractory materials. ( ) 4. The function of the waste gas damper is merely to control the amount of air and blast furnace gas entering the coke oven heating system. ( ) 5. The temperature at the bottom of the vertical flue is the highest temperature point in the combustion chamber. ( ) 6. The gas pressure inside the carbonization chamber must remain negative under all circumstances throughout the coking process. ( ) 7. Under laboratory conditions, the properties of bituminous coal such as thermal softening, melting, flowability, expansion, thermal decomposition, and cohesive solidification when heated are referred to as the caking property of bituminous coal. ( ) 8. The modern coke oven body consists of the roof area, carbonization chamber, combustion chamber, flue area, regenerator, and small flue, etc. ( ) 9. The temperature in the furnace top space affects the yield and quality of chemical products, as well as the formation of graphite at the furnace top. ( ) 10. The temperature at the top of the silicon brick regenerator must not exceed 1320°C. ( ) 11. A high volatile matter content in coke indicates that the coke is not fully matured. ( ) 12. The K2 coefficient can reflect the quality of overall workshop management. ( ) 13. To ensure the balanced operation of coke ovens, it is necessary to formulate plans for coke pushing, coal charging, and maintenance; that is, a coke-pushing plan. ( ) 14. When the coke oven body is not airtight, the pressure in the gas collecting main can be reduced to eliminate smoke emissions from the oven body. ( ) 15. Both the water seal cover of the riser pipe and the dust suppression plates of the quenching tower are environmental protection facilities. ( ) IV. Short-answer questions (30 points) 1. What are the drawbacks of poor sealing of coke oven doors? (10 points) 2. Briefly describe the harms of high pushing currents and secondary coke to the furnace body? (10 points) 3. Discuss how to ensure safe production in your own position. (10 points)
B. Pressure in the gas collection pipe
C. Coke discharge not carried out as planned
D. Ambient temperature
4. When two gases with densities ρ1 and ρ2 are mixed, what is their average density? A. (ρ1 + ρ2)/2 B. 2ρ1ρ2/(ρ1 + ρ2) C. (ρ1ρ2)^0.5 D. Impossible to calculate 5. Besides being related to the furnace type, the standard temperature is also related to ( ). A. Moisture content of coal
B. Type of heating gas
C. Pressure in the collecting main
D. Turnaround time
6. Within the same coking time, for every 10°C change in the standard temperature, the temperature at the center of the coke cake changes by ( ) °C accordingly. A. 7–8 B. 25–30 C. 50–60 D. Indeterminate 7. The time that coal stays in the carbonization chamber during the coking process is called ( ). A. Coking time B. Turnaround time C. Operating time D. Maintenance time 8. The basis for determining the standard coking temperature is ( ). A. Temperature of the collecting main B. Temperature at the top of the regenerator C. Temperature in the vertical flue D. Temperature at the center of the coke cake 9. Among the main quality indicators for furnace columns, the degree of bending prior to installation can be ( ) adjusted. A. 5–10 mm B. No more than 5 mm C. At least 5 mm D. No requirements 10. Among coking coals, which type of coal has the best caking properties? A. Gas coal B. Rich coal C. Coking coal D. Lean coal 11. Adhering to the principle of “whoever cuts off the power/whoever restores it” is mainly to ( ). A. Equipment safety B. Personal safety C. No abandonment of post 12. To prevent cracking due to drastic changes in the volume of the coke oven masonry, after coal charging, the temperature of the furnace wall must not drop below ( ) °C. A. 1000 B. 900 C. 800 D. 700 13. What represents the average temperature of the entire furnace? A. Straight-way temperature B. Transverse-row temperature C. Furnace head temperature D. Ambient temperature 14. ( ) is used to check the thermal efficiency of the coke oven and to determine whether there are any leaks in the main walls of the regenerator. A. Temperature of small flue B. Temperature at the top of the regenerator C. Temperature in the straight flue D. Temperature of branch flues 15. Coke with a particle size greater than ( ) mm is referred to as metallurgical coke. A. 25 B. 40 C. 60 D. 80 16. The checker bricks in the regenerator are ( ). A. Clay bricks B. High-alumina bricks C. Silica bricks D. Quarry tiles 17. The temperature of the raw coal gas in the collecting main should be around ( ) °C. A. 50 B. 90 C. 700 D. 800 18. To enable precise positioning of the coke pusher, large-capacity coke ovens employ the ( ) pushing sequence. A. 2-1 B. 5-2 C. 9-2 D. All of the above 19. When the riser tube cover is opened, black smoke emerges from the fire. The coke cake appears dark red in color, and the gaps between the walls of the carbonization chamber are small. This indicates that ( ). A. Under-coked B. Properly coked C. Over-coked D. None of the above 20. The quality indicators for coal blending in coke making include ( ). A. Carbon content B. Ash content C. Particle size D. Calorific value
III. True or False Questions (2 points per question, total 30 points)
1. The main factors determining the quality of coke are threefold: the quality and blending of coking coal, the pretreatment of coal before coking, and the coking process itself. ( ) 2. The amount of inert gases contained in blast furnace gas is less than that in coke oven gas. ( ) 3. Generally, materials with a refractoriness of 1200°C or higher are referred to as refractory materials. ( ) 4. The function of the waste gas damper is merely to control the amount of air and blast furnace gas entering the coke oven heating system. ( ) 5. The temperature at the bottom of the vertical flue is the highest temperature point in the combustion chamber. ( ) 6. The gas pressure inside the carbonization chamber must remain negative under all circumstances throughout the coking process. ( ) 7. Under laboratory conditions, the properties of bituminous coal such as thermal softening, melting, flowability, expansion, thermal decomposition, and cohesive solidification when heated are referred to as the caking property of bituminous coal. ( ) 8. The modern coke oven body consists of the roof area, carbonization chamber, combustion chamber, flue area, regenerator, and small flue, etc. ( ) 9. The temperature in the furnace top space affects the yield and quality of chemical products, as well as the formation of graphite at the furnace top. ( ) 10. The temperature at the top of the silicon brick regenerator must not exceed 1320°C. ( ) 11. A high volatile matter content in coke indicates that the coke is not fully matured. ( ) 12. The K2 coefficient can reflect the quality of overall workshop management. ( ) 13. To ensure the balanced operation of coke ovens, it is necessary to formulate plans for coke pushing, coal charging, and maintenance; that is, a coke-pushing plan. ( ) 14. When the coke oven body is not airtight, the pressure in the gas collecting main can be reduced to eliminate smoke emissions from the oven body. ( ) 15. Both the water seal cover of the riser pipe and the dust suppression plates of the quenching tower are environmental protection facilities. ( ) IV. Short-answer questions (30 points) 1. What are the drawbacks of poor sealing of coke oven doors? (10 points) 2. Briefly describe the harms of high pushing currents and secondary coke to the furnace body? (10 points) 3. Discuss how to ensure safe production in your own position. (10 points)
Answers
I. Fill-in-the-blank questions
1. 55, 56
2. Methane
3. 1000±50
4. High temperature, medium temperature, low temperature
5. Gassy coal, fat coal, coking coal, lean coal
6. Rising pipe, bridge pipe, water seal valve, collecting main
II. Multiple-choice questions
1. C
2. AB
3. ABCD
4. B
5. A, BD
6. B
7. A
8. D
9. B
10. C
11. B
12. D
13. A
14. A
15. A
16. A
17. B
18. B
19. A
20. B
III. True or False questions
1. √
2. ×
3. ×
4. ×
5. ×
6. ×
7. √
8. √
9. √
10. √
11. √
12. ×
13. ×
14. ×
15. √
IV. Short-answer questions
1. (1) Burn off some chemical products and coke. ⑵Smoke and flames are coming from the furnace door, damaging the iron components that protect the furnace. ⑶The coke inside the carbonization chamber burns, generating localized high temperatures that damage the furnace body. ⑷ Fluctuations in pressure within the carbonization chamber affect the heating process. ⑸ It also pollutes the environment. 2. A high pusher current indicates that the motor is delivering a large output force, which can easily damage the furnace walls. In particular, with secondary coke, it becomes impossible to push it further. Leaving the furnace door open for a long time causes severe damage to the furnace head, which shortens the furnace’s service life, disrupts the normal coke discharge sequence, and leads to temperature fluctuations within the furnace.
I. Fill-in-the-blank questions
1. 55, 56
2. Methane
3. 1000±50
4. High temperature, medium temperature, low temperature
5. Gassy coal, fat coal, coking coal, lean coal
6. Rising pipe, bridge pipe, water seal valve, collecting main
II. Multiple-choice questions
1. C
2. AB
3. ABCD
4. B
5. A, BD
6. B
7. A
8. D
9. B
10. C
11. B
12. D
13. A
14. A
15. A
16. A
17. B
18. B
19. A
20. B
III. True or False questions
1. √
2. ×
3. ×
4. ×
5. ×
6. ×
7. √
8. √
9. √
10. √
11. √
12. ×
13. ×
14. ×
15. √
IV. Short-answer questions
1. (1) Burn off some chemical products and coke. ⑵Smoke and flames are coming from the furnace door, damaging the iron components that protect the furnace. ⑶The coke inside the carbonization chamber burns, generating localized high temperatures that damage the furnace body. ⑷ Fluctuations in pressure within the carbonization chamber affect the heating process. ⑸ It also pollutes the environment. 2. A high pusher current indicates that the motor is delivering a large output force, which can easily damage the furnace walls. In particular, with secondary coke, it becomes impossible to push it further. Leaving the furnace door open for a long time causes severe damage to the furnace head, which shortens the furnace’s service life, disrupts the normal coke discharge sequence, and leads to temperature fluctuations within the furnace.
I have many—for various positions, related to safety, and all kinds of questions. If you want it, give me your email.
Please send one to me at 714054192@qq.com
Hello, could you please send me some?
My email. 714054192@qq.com