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Fill in the blanks (B) 1. A pump is a machine that converts the ( ) energy of the prime mover into ( ) and kinetic energy of the transported object. (KHD: Basic knowledge of technology) Answer: machinery; pressure 2. An electric motor is mainly composed of ( ) and ( ). (KHD: Basic knowledge of equipment) Answer: rotor; stator; 3. The lowest temperature at which combustible substances reach the point of spontaneous combustion is called ( ). (KHD: Basic theoretical knowledge) Answer: autoignition point 4. When the water contained in the oil in the tank is heated and vaporized, its volume rapidly increases to multiple times of the original ( ) and rises to the oil surface, followed by a sudden boiling. (KHD: Process Operation Capability) Answer: 17005. The direction of the purge line is consistent with ( ) in principle. Oil tanks with strict water requirements cannot use ( ) purge lines. (KHD: Process Operation Capability) Answer: Oil flow; steam 6. Thunderstorm and ( It is forbidden to work on the tank during thunderstorms with winds above ). When necessary, ( ) people must cooperate and take safety measures. (KHD: Process operation capability) Answer: 6; 27. The process parameters of the pump must be strict during use, and the following are: "four no-excesses", that is, no overtemperature, no overpressure, and no overspeed. ( ). (KHD: Equipment use and maintenance capabilities) Answer: No overload. 8. A low-pressure vessel means that the design pressure P is between 0.1 and ( ) MPa. (KHD: Basic knowledge of technology) Answer: 1.69 The purpose of oil blending is to obtain the required oil, adjust the variety and ( ) of the oil. (KHD: Basic knowledge of technology) Answer: Change the quality of the oil 10. The temperature of the oil storage and transportation medium is too high, which can easily cause ( ). (KHD: Basic knowledge of technology) Answer: Oil deterioration 11. When blending fuel oil, collect the ( ) component oil first, and then collect the ( ) component oil. (KHD: Basic knowledge of raw and auxiliary materials) Answer: light; heavy; 12. The organic compound used to improve the storage, transportation and performance of oil products is called ( ). (KHD: Basic theoretical knowledge) Answer: petroleum additives. 13. In the valve model, the symbol of the stop valve is ( ). (KHD: Knowledge of technical management and new technology) Answer: J14. The sweep must be controlled when sweeping the line, and the sweeping time for high pouring point oil after movement must not be less than ( ) minutes, for general oil products, the cleaning time is not less than ( ) minutes. (KHD: Process operation capability) Answer: 15; 1015. The blending methods of oil products include ( ), ( ) and pipeline blending. (KHD: Process operation capability) Answer: Pump circulation; mechanical stirring 16. When moving high-freezing point oil products in summer, the moving temperature is higher than ( ) ℃ of the oil. (KHD: Process operation capability) Answer: Freezing point; 15℃; 17. The tank loading operation should be done at ( ) to prevent ( ). (KHD: Process operation ability) Answer: Upwind; poisoning; 18. The emergency pump can be turned off ( ) first (KHD: Equipment use and maintenance ability) Answer: Power supply. 19. The operation of the pump in operation should be recorded once every ( ) hour. (KHD: Technical management and innovation ability) Answer: 120. Class Q explosion hazard places refer to flammable ( ), flammable or combustible ( ) ) is a place where explosive mixtures of steam and air are mixed. (KHD: Accident judgment, handling and response capabilities) Answer: gas; liquid; 21. To achieve quality management for all employees, we must first do a good job in quality management education for all employees, strengthen employees' ( ), and firmly establish the idea of ( ). (KHD: Product quality knowledge) Answer: Quality awareness; quality first; 22. Filtering gas masks can only be used to prevent ( ) toxic media, and are prohibited from using to prevent other toxic media and various ( ) gases. (KHD: Safety and environmental protection knowledge) Answer: compatible with it; breathability; 23. Except for special circumstances, the principle of valve switching is first ( ), then ( ). (KHD: Basic knowledge of technology) Answer: on, off. 24. Compressed air is strictly prohibited for oil products with a flash point lower than ( ) ℃. (KHD: Basic knowledge of technology) Answer: 6025 In order to ensure safety, the temperature of the oil tank must be controlled below ( ) ℃. (KHD: Process operation capability) Answer: 90℃ 26. When the water trap is used intermittently in winter, turn the drain outlet toward ( ). (KHD: Equipment use and maintenance capability) Answer: Part 27. When working and rescuing accidents under conditions of high concentration and lack of oxygen, ( ) gas masks should be used. (KHD: Safety and environmental protection knowledge) Answer: Isolated 28. ( ) and ( ) are not clean, and the oil is easily contaminated and deteriorated. (KHD: Basic knowledge of technology) Answer: Containers, equipment pipelines. 29. During inspection, pay attention to check whether the movement ( ) and ( ) are normal. (KHD: Basic knowledge of technology) Answer: Pipelines, valves 30. If the temperature of the oil storage and transportation medium is too low, it is easy to cause ( ). (KHD: Basic knowledge of technology) Answer: Oil loses fluidity and causes it to solidify. 31. The head of a pump refers to the total energy obtained by unit ( ) of liquid passing through ( ). (KHD: Basic knowledge of equipment) Answer: Weight; pump; 32. The vertical distance from the gauge point to ( ) is called the total height of the gauge. (KHD: Basic theoretical knowledge) Answer: Tank bottom. 33. When the oil level in the storage tank is lower than the heating tube in winter, the heater should ( ) to prevent ( ). (KHD: Process operation capability) Answer: Micro heating; Freeze crack; 34. The calculated height of the empty gauge for heavy oil is oil meter = gauge height - number of lower gauges + ( ). (KHD: Process operation capability) Answer: Oil immersion height. 35. The specified drop gauge position at the bottom of the oil tank is called ( ). (KHD: Process operation capability) Answer: Gauge point. 36. Long-distance pipeline freezing can be dealt with ( ). (KHD: Process operation capability) Answer: Sectional; 37. When the current of the centrifugal pump is too large, slowly control the ( ) valve of the pump until the current is within the rating. (KHD: Equipment use and maintenance capabilities) Answer: Exit 38. When the concentration of hydrogen sulfide in the air is less than 10 kg/cubic meter, the odor increases in direct proportion to the concentration ( ), but when the concentration exceeds 10 kg/cubic meter, the odor ( ) weakens instead. (KHD: Safety and Environmental Protection Knowledge) Answer: Rise; the concentration continues to rise; 39. All materials in the stop and reduce device must be removed. It is indeed impossible to exit. The pipelines at the connected parts must be ( ) and clearly marked with ( ). (KHD: Safety and Environmental Protection Knowledge) Answer: Add a blind plate; if there is material inside, it is strictly forbidden to use fire. 40. The phenomenon of ( ) is likely to occur when switching to handle empty tanks. (KHD: Basic knowledge of process) Answer: Evacuation 41. The phenomenon of ( ) is prone to occur when switching production tanks. (KHD: Basic knowledge of process) Answer: Pressure suppression 42. Failure to dehydrate the oil tank in time can easily lead to unqualified water content. ( ) and ( ). (KHD: Basic knowledge of process) Answer: Oil emulsification and deterioration, sudden boiling. 43. Among the quality indicators of 90# gasoline, the octane number of the research method is not less than ( ). (KHD: Basic knowledge of process) Answer: 9044. The five must-haves for equipment lubrication management are: fixed point, timing, ( ), ( ). Determine the person. (KHD: Basic knowledge of equipment) Answer: Qualitative; Quantitative; 45. After the oil tank is paid, the ruler should be checked after ( ). (KHD: Process operation capability) Answer: 30 minutes; 46. Oil tanks that have been out of service for a long time in winter must be ( ) or ( ). (KHD: Process operation capability) Answer: Micro ventilation; clean the heating pipe 47. When the oil in the oil tank is heated by steam, it is advisable to adjust the pipe outlet valve at any time to discharge ( ). (KHD: Equipment use and maintenance capabilities) Answer: half steam and half water. 48. Any work performed at a height above the fall height reference level ( ) where there is a possibility of falling is called high-altitude work. (KHD: Accident judgment, handling and response capabilities) Answer: 2m (including 2m) 49. The opening pressure of the safety valve must not exceed the container ( ), and is generally adjusted according to the operating pressure of the equipment and then increase ( ). (KHD: Safety and environmental protection knowledge) Answer: Design pressure; 5-10% 50. One of the reasons why oil products generate static electricity during transportation is ( ). (KHD: Basic knowledge of technology) Answer: The flow rate of the flowing product is too fast. 51. When heavy oil is collected above ( ) ℃, sudden boiling must be prevented at all times. (KHD: Technical management and new technology knowledge) Answer: 95;52. If the drain does not drain, there are two reasons: one is ( ), and the other is ( ). (KHD: Process operation capability) Answer: The trap is clogged with dirt; it leads to freezing and condensation; 53. When installing ( ) oil with a high freezing point in winter, the pipeline must be ( ) to prevent the pipeline from freezing and condensation, which affects production. (KHD: Process operation capability) Answer: The viscosity is large; clean it thoroughly. 54. The oil products are ( ), and inventory measurement is mainly for ( ). Check the implementation of the stage operations; (KHD: Process operation capability) Answer: Month, quarter, year; control inventory; 55. Safety inspection is an effective measure to discover and eliminate hidden dangers of accidents in a timely manner. According to the specific actual situation, the form is roughly divided into ( ), ( ), ( ). (KHD: Safety and environmental protection knowledge) Answer: daily safety inspection; regular safety inspection; professional safety inspection; multiple choice question 1. The grade of diesel is () ) is represented by the size of the A. Cetane number; B. Octane number; C. Combustion value; D. Freezing point. (KHD: Basic knowledge of technology) Answer: D2. The flash point can identify the fire hazard of oil products, which can determine the ( ) method of the oil. A. Production; B. Heating; C. Cleaning; D. Use; (KHD: Basic knowledge of technology) Answer: C3. When the liquid is moved by external forces, ( ) is generated between the molecules. ) size is called viscosity. A. Internal friction; B. Relative motion; C. Gravity influence; D. Repulsive force; (KHD: Basic knowledge of technology) Answer: A4. Before the steam reciprocating pump is opened, the outlet valve ( ). ) is called the total height of the gauge. A. Bell jar; B. The highest point of the heating tube. C. The bottom of the water tank. D. The bottom of the tank (KHD: Basic theoretical knowledge) Answer: D6. The purpose of measuring oil products in a refinery is ( ). A. To grasp the basis for operating settlements of oil products entering and leaving the factory; B. It varies according to different production processes and times. C. To ensure the quality of oil products; D. To ensure the safety of production. (KHD: Knowledge of technical management and new technologies) Answer: A7. During the product collection process, if the product of the device is found to be unqualified, you should immediately ( ). A: Turn on the air and stir to prevent stratification in the tank; B. Transfer the unqualified products to the intermediate tank or other oil tanks; C: Carry out ruler and temperature checks to prevent roof collapse accidents; (KHD: Process operation capability) Answer: B8. After the centrifugal pump is connected in series, its head ( ). A. decreases; B. increases; C. remains unchanged; D. is uncertain. (KHD: Equipment usage and maintenance capabilities) Answer: B9. Stop pumping out and plugging blind plates around ( ) meters of fire work. Fire or flammable materials are strictly prohibited on the work site. A: 10B: 20C: 30 (KHD: Accident judgment, handling and response capabilities) Answer: C10. ( ) Fire extinguishers are suitable for extinguishing fires in precision food and electrical appliances. A. Carbon dioxide; B. Dry powder; C: 1121; D. Fluorine protein foam. (KHD: Equipment usage and maintenance capabilities) Answer: C11. The safe voltage for entering the container is ( ) volts. A.6B.12C.24D.36E.42 (KHD: Basic knowledge of technology) Answer: B12. When the breathing valve of the oil tank is pushed open by oil and gas, the pressure in the tank will ( ). A. increase; B. remain unchanged; C. decrease; D. fluctuate up and down; (KHD: basic knowledge of technology) Answer: C13. The relationship between the auto-ignition point and the ignition point of oil is ( ). A. The auto-ignition point is higher than the ignition point B. The ignition point is higher than the auto-ignition point C. Depends on the properties of the oil; (KHD: Basic knowledge of technology) Answer: A14. The purpose of centrifugal pumps in series is to obtain ( ). A. Energy; B. Lift; C. Product; D. Flow; (KHD: Basic knowledge of technology) Answer: B15. The purpose of parallel connection of centrifugal pumps is to obtain ( ).A. Energy; B. Lift; C. Product; D. Flow; (KHD: Basic knowledge of technology) Answer: D16. When sweeping the line with air, the air temperature and oil temperature should be lower than the flash point of the oil ( ) ℃.A.20; B.40; C.60; D.80; (KHD: Basic knowledge of technology) Answer: A17. The causes of oil deterioration are ( ).A. Other oil products were mixed during operation; B. The oil tank was not inspected on time; C. The position of the oil tank was too high; D. The oil carbon residue was high; (KHD: Technical Management and New Technology Knowledge) Answer: A18. Operation method of the oil tank heater after heating ( ). A: Only close the heater inlet valve; B. Only close the heater outlet valve; C. Close the heater outlet valve first, then close the inlet valve; D. Close the heater inlet valve first, then the outlet valve; (KHD: Process operation capability) Answer: D19. When cutting water in an oil tank, the oil tanker ( ). A: Can only check the ruler and temperature of the tank; B. It is strictly prohibited to leave the site to do any work; C. If there is a large amount of water in the tank, you can leave the site; D. You are not allowed to leave the site for more than 10 minutes. (KHD: Process operation capability) Answer: B20. If two or more oil tank water cutting valves are connected in series, they must ( ).A. Close several valves at the same time; B. Close the last valve first; C. Close sequentially from the root of the tank; D. Close any one of them. (KHD: Equipment use and maintenance capabilities) Answer: C21. The running oil pump should be recorded every ( ). A. 1 hour; B. 2 hours; C: 4 hours; D: 8 hours; (KHD: Technical management and innovation ability) Answer: A22. When the oil tank cuts a large amount of water, pay attention to ( )'s drainage capacity is appropriately controlled to prevent overflow. A: Sewer well B: Oil tank; C: Sewage D: Oil pool (KHD: Product quality knowledge) Answer: A23. The top of the oil tank ( ) is called the gauge point. A. Designated vent B. Designated drop point; C. Gauge opening. (KHD: Basic knowledge of technology) Answer: B24. The minimum scale of the oil dipstick is ( ).A decimeter; B. centimeter; C. millimeter; D. micron. (KHD: Basic knowledge of technology) Answer: C25. When the dipstick is bent, the dipstick must be ( ). A. It can be used only after it is straight; B. It can only be used with other rulers for measurement readings. C. It can be used, but it must be the same ruler; D. It must not be used. (KHD: Basic knowledge of equipment) Answer: D26. The cleaning method of a certain oil product is based on the oil product ( ) determined. A. Ignition point; B. Flash point C. Freezing point D. Freezing point (KHD: Technical management and new technology knowledge) Answer: B27. The number of manholes in an oil tank is determined by its volume, but the diameter of the manhole is generally ( ) mm. A: 400B: 600C: 1000D.1400 (KHD: Process operation capability) Answer: B28. Before the oil tank is almost full, it must ( ).A: Caliper measurement; B: Change tank; C: Stop collecting oil; D: Pour oil. (KHD: Process operation capability) Answer: A29. The function of the breathing valve is to make the ( ). In the transportation of oil, the ones with low freight and continuous transportation are ( ). A: Waterways; B. Highways; C. Pipelines; D. Railways: (KHD: Technical management and innovation capabilities) Answer: C31. When the temperature of the oil in the tank is 0°C, the actual volume value of the oil tank ( ). A. Greater than; B. Less than; C. Equal to; D. Determined. (KHD: Basic knowledge of technology) Answer: A32. When using a heater to heat oil, the oil level should be higher than the heater ( ) m.A.0.5B.0.3C.1D.1.5 (KHD: Equipment usage and maintenance capabilities) Answer: A33. Under normal circumstances, the pressure of the cleaning line is not less than ( ) MPa.A.0.1;B.0.4;C.1.0;D.1.5; (KHD: Basic knowledge of technology) Answer: B34. When the liquefied petroleum gas storage tank is stopped for inspection, first perform the ( ) operation. Then release the pressure. A. Inject water; The amount of top-line replacement oil should not be less than ( ). A. 2 times B. 4 times C. The same amount. D. No requirement. (KHD: Technical management and new technology knowledge) Answer: A37. In order to prevent the oil tank from collapsing, under special circumstances, ( ). A: Water cutting B: Heating; C: Regular ruler inspection; D. Irregular ruler inspection; (KHD: Process operation capability) Answer: D38. When the medium transported by the centrifugal pump contains air, it will cause ( ).A. Pump overpressure; B. Overload; C. Pump evacuation; D. Increase in flow rate. (KHD: Equipment use and maintenance capabilities) Answer: C 39. The storage temperature of oil products must be controlled below ( )°C. A.40B.95; C.100; D.150 (KHD: Basic knowledge of technology) Answer: B40. Internal floating roof oil tanks can reduce the ( ) loss. A. Evaporation; B. Small breathing; C. Big breathing; D. Natural. (KHD: Technical management and new technology knowledge) Answer: A41. During the oil collection process, when the tank needs to be transferred to collect oil, the operating principle of ( ) must be strictly implemented. A: Close first, then open; B: Open first, then close; C: Switch at the same time. (KHD: Process operation capability) Answer: B42. When the oil tank is found to be boiling, it should be immediately () ).A: Stop the collection and payment operation; B: Blow steam into the tank to prevent fire; C: Blow air into the tank to cool down; D: Block the openings on the top of the tank to prevent overflow. (KHD: Process operation capability) Answer: A43. In order to prevent the oil from generating static electricity, the oil during transportation ( ).A: The pressure cannot be too high; B: The speed cannot be too fast; C: The pipe diameter cannot be too large; D: The distance cannot be too far (KHD: Process operation capability) Answer: B44. When the pump is out of service, you should first ( ).A. Close the pump outlet valve; B. Close the pump inlet valve; C. Stop the power supply; ) range. Oil evaporation performance. A. Flash point; B. Boiling point; C. Freezing point; D. Freezing point; (KHD: Basic knowledge of process) Answer: B46. Minimize the ( ) space in the tank to reduce the loss of oil; A. Steam B. Oil and gas C. Oil D. Water. (KHD: Technical management and new technology knowledge) Answer: B47. After sweeping the line with wind, and after the terminal encounters the wind, it should ( ).A: Stop the air B: Close the intake valve; C: Transfer the air to the sewer well; D: Continue purging for 3--5 minutes and then stop. (KHD: Process operation capability) Answer: D 48. The main purpose of regular inspection of the ruler is ( ). A: Master the oil temperature in the tank to prevent condensation line during transportation; B: Prevent water from entering in rainy and snowy days; C: Determine whether the heater is leaking or has oil string. D: Reduce the evaporation loss of oil products. (KHD: process operation capability) Answer: C49. After the storage tank stops delivering products, the ( ) phenomenon will occur due to human factors during temperature inspection, which causes the gauge temperature to be higher than the actual temperature. A: Loss; B: Profit; C: No profit or loss; (KHD: Process operation capability) Answer: B50. Among the four types of safety valves, pneumatic control valves, gate valves, and check valves used in the tank area, the valve with the best sealing performance and the smallest valve body resistance is ( . What is an inspection ruler? What is an empty inspection ruler? (KHD: Basic knowledge of technology) Answer: Verification ruler: directly measures the vertical height from the oil level to the bottom of the tank; Air inspection ruler: measures the height between the oil level and the inspection ruler point, and then subtracts the space height from the inspection ruler height to get the actual oil height. 3. What is the significance of flash point in storage and transportation? (KHD: Process Operation Capability) Answer: The flash point can identify the fire risk of oil products, which can determine the storage and transportation methods of the oil and the cleaning medium. The change in flash point can determine whether other oil products are mixed with the oil. 4. What does it mean when the liquid level of a stationary or paid oil tank rises during regular dipstick inspection? (KHD: Process Operation Capability) Answer: (1). Oil string; (2). Heating pipe leakage; (3). Oil heating and temperature rise. 5. What is the reason why the centrifugal pump disc does not start? How to deal with it? (KHD: Equipment maintenance capability) Answer: Reasons: (1). The oil in the pump body solidifies; (2). There is pressure at the pump outlet; (3). Component damage; (4). Shaft deformation. Treatment methods: (1). Preheat; (2). Relieve pressure; (3) Replace parts; (4). Replace or repair the shaft. 6. Brief answer: How to switch a centrifugal pump? (KHD: fixed operation) Answer: (1). After making preparations for starting the standby pump, open the inlet valve of the pump; (2). Start the standby pump motor and run for 1-2 minutes. After observing that the pump outlet pressure and current are normal, slowly open the outlet valve of the standby pump. (3). While slowly opening the outlet valve of the standby pump, gradually close the outlet valve of the original operating pump to reduce fluctuations in flow pressure. (4). After the standby pump to be activated operates normally, stop the switched pump. 7. Why can’t equipment operate under overtemperature, overpressure, and overload? (KHD: fixed operation) Answer: Machines, pumps, and equipment are designed and manufactured according to certain usage requirements. However, considering factors such as materials, manufacturing and usage, although there is a certain safety factor in the design, it is never allowed to operate under over-temperature, over-pressure, and over-load. Otherwise, explosions will occur if the limit is exceeded, and serious damage to machinery and equipment will occur. Therefore, without careful accounting and research, arbitrary changes in process index regulations, over-temperature, over-pressure, and over-load operation must be resolutely prohibited. 8. What are the conditions for electrostatic ignition? (KHD: Basic knowledge of technology) Answer: In order for electrostatic charge to become a source of ignition, the following four conditions must be fully met: (1) There must be generation of electrostatic charge; (2) There must be an accumulation of electrostatic charge sufficient to generate sparks; (3). There must be a suitable spark gap so that the accumulated charge can be discharged in the form of igniting sparks. (4). There must be a mixture of vapor of flammable liquid---air in the spark gap. 9. What are the contents of the "Five Not Allowed to Leave the Factory"? (KHD: Basic Knowledge of Processes) Answer: (1) Quality varieties and specifications that do not meet the standard requirements are not allowed to leave the factory. (2). Analysis items are not complete and are not allowed to leave the factory. (3) There is no certificate or laboratory test sheet. (4) Packaging containers that do not meet the standard requirements are not allowed to leave the factory. (5) If samples are not retained in accordance with regulations, they are not allowed to leave the factory. 10. What are the sources of tank farm sewage? (KHD: Basic knowledge of technology) Answer: (1). Cut and discharge the bottom water of the oil tank from the oil tank, (2). Rainwater in the waterproof embankment; (3). Condensate water from the oil tank heater; (4). Sewage discharged when cleaning the oil tank and pipeline. 11. What is the function of the safety valve? (KHD: Basic knowledge of equipment) Answer: When the medium pressure exceeds the specified value, the safety valve can automatically drain, eliminating the risk of damage to the equipment or pipeline. After the pressure is normal, it can automatically close and resume normal operation. 12. What are the contents of the five major disciplines? (KHD: Technical management and new technology knowledge) Answer: Work discipline; process discipline; operating discipline, labor discipline; construction discipline. 13. What are the precautions when filling an empty tank with oil? (KHD: Process Operation Capability) Answer: When collecting oil from a newly built tank, an oil tank after maintenance or cleaning, attention must be paid to: (1) Whether the screws of each manhole are tightened; (2) Check whether there is oil leakage when the oil reaches the manhole; (3) As the liquid level rises, the pressure increases, and the bottom and wall of the tank must be checked at any time for leaks. 14. What is the reason for oil leakage from oil tanks? (KHD: Process Operation Capability) Answer: The reason is a weak sense of responsibility, failure to inspect on time, inaccurate control of the oil tank payment volume, and an error in the gauge; the oil tanker misoperated or the valve adjacent to other oil tanks leaked or was not closed. 15. What is the reason for the oil leakage from the tank? (KHD: Process Operation Capability) Answer: (1). A weak sense of responsibility for the work, lack of inspection, or violation of discipline. (2) Lack of insulation facilities, frozen and cracked oil pipes or valves; (3). The oil storage and oil transportation equipment is in disrepair. (4). The quality of maintenance and construction is poor; (5). Unclear handover and poor contact during shift handover. (6) Leaving the scene during water cutting operations. 16. How to avoid oil leakage accidents of tank trucks? (KHD: Accident Judgment, Handling and Response Ability) Answer: (1). Carefully check the tank truck equipment before loading, and you must confirm that the oil drain valve is closed before loading; (2). If the oil drain valve fails, loading is prohibited; (3). During the loading process, the lower port of the tanker should be checked frequently. If leakage is found at the lower port, corresponding measures should be taken. 17. What are the causes and treatment methods of sudden boiling of oil tanks? (KHD: Accident Judgment, Handling and Contingency Capacity) Answer: Reason: (1). There is water in the tank; (2). The treatment method when the oil temperature exceeds 100℃: (1). Stop oil collection and payment operations; (2). Stop heating; (3). Pour cold oil into the tank if possible, and block the surrounding area of the tank area. (4). Clean up the oil that has escaped in a timely manner and do a good job of recycling it. 18. What are the causes and treatment methods of oil tank fires? (KHD: Accident Judgment, Handling and Contingency Ability) Answer: Reasons: (1). Relevant personnel are not serious, careless, have lax systems, poor management, and violate operating procedures; (2). Use fire, lightning strikes, static electricity and other sources of fire around the tank to make the oil temperature reach the spontaneous ignition point. Treatment methods. Treatment methods: (1). Immediately call the police and stop oil collection and payment; (2). Open the emergency steam line, spray water to cool the adjacent oil tank, and handle the walls, drains, etc. to prevent the spread; (3). If possible, pour out the oil from the adjacent oil tank. 19. What work should be done on rainy days and what should be paid attention to during operation? (KHD: fixed operation) Answer: (1). On rainy days, the light-transmitting holes and sky inspection holes of the oil tanks should be covered to prevent rainwater from entering; (2). Oil tanks with drainage folding pipes should open the drainage valve in time on rainy days, drain the rainwater from the top of the tank, pay attention to the tank liquid level, and promptly check whether the drainage folding pipe leaks; (3). For high-condensation-point oil pipelines with poor insulation, the delivery pressure and flow rate must be controlled to prevent excessive heat dissipation in the pipelines and the solidification of the oil; (4) Pay attention to checking the equipment, and check the drainage conditions around the building for signs of subsidence; (5) Wear raincoats when working outdoors, and it is strictly prohibited to use umbrellas; (6). When working outdoors in windy and rainy days, it is necessary to prevent the insulation iron sheet of the equipment from flying down and injuring people; (7). It is strictly forbidden to work on the tank roof during thunderstorms and rainy days with winds above Category 6. When it is necessary to go up the tank on windy days, two people should cooperate and take effective safety measures. 20. What work should be done in snowy days and what should be paid attention to during operation? (KHD: Fixed operation) Answer: (1). In snowy days, the light holes and manholes on the top of the tank should be covered to prevent snow from falling. (2). For high-freezing-point oil pipelines with poor insulation, pay attention to check the delivery pressure and flow of the pump to prevent excessive heat dissipation in the pipeline, causing the oil to solidify; (3). Clean the snow in the tank area, equipment, and working channels in a timely manner; (4). When working outdoors in strong winds and snow, prevent falling iron sheets from injuring people; (5). On windy and snowy days, if the equipment and stairs freeze, tank roofing operations can be stopped with the consent of the relevant parties. Two people must cooperate when getting on the tank, and effective safety measures must be taken.