Recently we did a small test

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1. True or False Questions (1 point for each question, 20 points in total) 1. The production area of ​​a petrochemical enterprise should be located on the downwind side of the adjacent town or residential area in the wind direction with the minimum frequency throughout the year. --------( ) 2. In the same building, rooms where people are concentrated should be arranged at the end with less fire risk. ----------------( ) 3. Equipment, buildings and structures should be arranged in zones according to the characteristics of the production process and fire risk categories. -----------( ) 4. The air cooler should not be arranged above equipment whose operating temperature is equal to or higher than the spontaneous ignition point of materials and equipment that transports and stores liquefied hydrocarbons. ； Otherwise, partitions of non-combustible materials should be used for isolation and protection. ------------------------( ) 5. When the total volume of the full-pressure liquefied hydrocarbon storage tank is greater than 10,000m3, a dike should be set up in the tank group, and the sum of the total volumes of the storage tanks in the dike should not be greater than 10,000m3. When the volume of a single tank is greater than 5000m3, each tank should be separated by one. ---------( ) 6. When arranging solid materials or pipelines containing solid materials, the pipelines should be as short as possible, with as few turns and no dead ends. -----------( ) 7. The pipeline flame arrester on the fuel gas main pipe of the heating furnace should be close to the heating furnace and facilitate maintenance. The distance between the pipeline flame arrester and the burner should not be less than 12m. ------------------------( ) 8. The steam branch pipe should be connected from the top of the steam main pipe, and the cut-off valve on the branch pipe should be installed as close to the main pipe section as possible to avoid liquid accumulation. ( ) 9. When combustible gas compressors and centrifugal combustible liquid pumps have power outages, steam outages or abnormal operation, and medium backflow may cause accidents, shut-off valves should be installed on their outlet pipes. -------------( ) 10. Gate valves should be used as cut-off valves on the air bleed or drain pipes. Pipelines with high pressure, extremely hazardous and highly hazardous media should be equipped with double valves. When a single valve is installed, a blind plate or flange cover should be added. -------------( ) 11. In a closed Class A, B, C pump room or Class A gas compressor room with an indoor space greater than 500m3, a fixed steam screen pipe should be installed along one side of the wall 150 to 200 meters above the ground. --------( ) 12. The inlet and outlet pipes of the storage tank are connected at the lower part of the tank. Since the foundation of the storage tank may continue to sink during use, the inlet and outlet pipes should be connected with metal hoses or other flexible connections. --------( ) 13. The function of the isolation valve of the regulating valve is to close the pipeline when the regulating valve is inspected, so a stop valve should be used. The bypass valve is used to regulate the flow, and a gate valve is generally used. --------( ) 14. The elbow should be a long radius elbow with a curvature radius equal to 1.5 times the nominal diameter. ； Pipes transporting gas-solid and liquid-solid two-phase flow materials should use large curvature radius elbows. ----------------------( ) 15. A filter or detachable nipple should be installed on the compressor inlet pipe to facilitate installation of a temporary filter and cleaning of the pipe before starting. ---------( ) 16. In order to accurately measure the static pressure, the pressure tapping point of the pressure gauge should be on the straight pipe section, and a shut-off valve should be installed. ---------------( ) 17. Excessive lateral displacement may affect adjacent pipelines, and limit brackets should be installed. --------( ) 18. The distance between the edge of the support and hanger and the pipe weld should not be less than 80mm, and the distance between the edge of the support and the pipe weld that requires heat treatment should not be less than 120mm. ( ) 19. The allowable operating temperature of insulation materials and their products should be lower than the design temperature of equipment and pipelines. ( ) 20. The design fire protection specifications for petrochemical enterprises are applicable to the fire protection design of new construction, expansion or reconstruction projects of petrochemical industries using petroleum, natural gas and their products as raw materials, but are not applicable to the fire protection design of new PVC projects using lime and coke as raw materials. ------ ( ) 2. Fill-in-the-blank questions (2 points each, 30 points in total) 1. The production areas of petrochemical enterprises should be located in nearby towns or residential areas throughout the year. 2. The air cooler should not be arranged in__ _ _ _ and, above the device ； Otherwise, partitions of non-combustible materials should be used for isolation and protection. 3. The total volume of the full-pressure liquefied hydrocarbon storage tank is greater than__ _ _ _ _ m3, a dike should be set up in the tank group, and the sum of the total volumes of the tanks in the dike should not be greater than__ _ _ _ _ m3. The volume of a single tank is equal to or greater than__ _ _ _ _ _ When m3, each should be separated by one. 4. When laying out solid materials or pipelines containing solid materials, the pipelines should be __ _ _ _ _ ,__ _ _ _ and__ _ _ _ . 5. The pipeline flame arrester on the fuel gas main pipe of the heating furnace should be close and convenient. The distance between the pipeline flame arrester and the burner should not be greater than m. 6. For combustible gas reciprocating compressors, the pipeline layout should consider the natural flow of liquid. The low points of the pipeline should be discharged at low points of the pipeline. Vent valves at high points should be installed to prevent leakage, and the pipe trenches around the unit should be installed to avoid the accumulation of combustible gas. 7. When oxygen pipelines are laid together with pipelines for flammable gas, liquefied hydrocarbons, and flammable liquids, the oxygen pipeline should be arranged on one side and should be separated from the above-mentioned pipelines, or should be kept no less than__ _ _ _ mm clearance. 8. Where the sampling valve should be installed, otherwise it needs to be installed, and the pipe section between the equipment or pipeline and the sampling valve should be. 9. To prevent corrosion of the torch main pipe, flammable gases that may carry corrosive droplets after release must be__ _ _ _ Only then can it be connected to the torch main pipe. 10. To prevent the boiler fuel oil from solidifying in the pipes, the following measures can be taken: 1) ； 2) ； 3)__ _ _ _ _ . 11. When using reducing flange connection, the flow direction of the conveying medium should be__ _ _ _ _ flow direction __ _ _ _ _ . 12. For process pipelines with branches, when installing thermometers or thermocouples, special attention must be paid to the installation location and compliance, and they cannot be installed at the edge of the pipeline.__ _ _ _ _ _ _ ,__ _ _ _ _ Location. 13. The distance between the edge of the support and hanger and the pipe weld should not be less than mm, and the distance between the edge of the support and the pipe weld that requires heat treatment should not be less than__ _ _ mm. 14. Fire lanes should be provided in the process equipment area and liquefied hydrocarbon storage tank area. When restricted by terrain conditions, a fire lane returning to the parking lot may also be provided. The width of the fire road should not be less than__ _ _ _ _ m, the turning radius of the inner edge of the road surface should not be less than__ _ _ m, the clearance height on the road should not be less than m. 15. The selection of coatings should be considered: and__ _ _ _ and __ _ adapt. 3. Multiple-choice questions (1 point each, 10 points in total) 1. The production area of ​​a petrochemical enterprise should be located in a nearby town or residential area ( ). a. Upwind side ； b. Downwind side ； c. The upwind side of the wind direction with the lowest frequency throughout the year ； d. The downwind side of the wind direction with the lowest frequency throughout the year. 2. Fire separation distance between adjacent above-ground storage tanks for Class A, B and B flammable liquids: Fixed roof tanks larger than 1000m3 should not be less than ( ) ； Floating roof tanks and inner floating roof tanks should not be smaller than ( ) ； The horizontal tank should not be smaller than ( ). a、0.8m ； b. 1.2m ； c、1.5m ； d、0.4D ； e. 0.6D ； f. 1D. 3. Pipelines for high pressure, extremely hazardous and highly hazardous media should be equipped with ( ). a. Single valve ； b. Single valve + blind plate ； c. Single valve + flange cover ； d. Double valve. 4. A start-up vent pipe should be installed on the boiler superheater outlet header to prevent the superheater from overheating when the boiler is started. A ( ), a ( ) and ( ) should be installed on the start vent pipe. There should be ( ) switches and valve position indicators in the instrument room. a. Gate valve ； b. Electric gate valve ； c. Stop valve ； d. Electric stop valve ； e. Silencer ； f. Filter. 5. For horizontal suction centrifugal pumps, when the inlet pipe is changed in diameter, a reducer ( ) should be installed near the inlet of the pump. When the pipeline enters the pump from bottom to top, it should be installed with ( ). When the pipeline enters the pump from top to bottom, it should be installed with ( ). a. Concentric ； b. Eccentricity ； c. Bottom flat eccentricity ； d. Top level eccentricity. 6. In order to ensure accurate measurement of the orifice plate flowmeter, there should be ( ) D in front of the hole, and there should be ( ) D straight pipe section behind the orifice plate. a. 15 times ； b. 15~20 times ； c. 10 times ； d. 5 times ； e. 3 times. 7. The risers arranged along the vertical equipment should be provided with ( ) and ( ) ； When one ( ) cannot bear the weight of the pipe, ( ) and ( ) should be set. a. Fixed bracket ； b. Guide bracket ； c. Limit bracket ； d. Spring bracket ； e. Load-bearing bracket. 8. To avoid, limit or delay the solidification and freezing of media in equipment and pipelines to maintain normal production, it should be ( ). a. Insulation ； b. Keep cold ； c. Anti-scalding. 9. When there are no special requirements for the process, ( ) should be used to calculate the thickness of the insulation layer. a. Economic thickness method ； b. Surface temperature method ； c. Heat balance method. 10. When jacketed pipe heating is used, the medium temperature of the casing can be equal to or higher than the temperature of the medium being followed, but the temperature difference should not exceed ( ). a.10℃ ； b.20℃ ； c、30℃ ； d.40℃ ； e. 50℃. 4. Questions and Answers (10 points each, 40 points in total) 1. What are the key points in designing the compressor inlet and outlet pipe supports? 2. What are the fire protection requirements for buildings according to GB50160-92? 3. What are the requirements for the layout of liquefied hydrocarbon pipelines? 4. Under abnormal conditions, those equipment that may be over-pressured should be equipped with safety valves? (Please write it in English) At the same time, please use a diagram to illustrate the minimum distance between the safety valve outlet of the ethylene pipeline, the pump room power distribution room and the factory wall, and assume a minimum frequency wind direction throughout the year. This post was last edited by tuliplt on 2009-4-2 12:33 ]