One Question per Day on Refining Knowledge (Technology) 110124

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We welcome everyone to actively participate in the learning and discussion of professional basic knowledge in the refining technology exchange area! In accordance with the forum’s uniform requirements, the maximum score for this activity is 5 Wealth points, and it is prohibited to assign charm scores. Friendship requests and duplicate ratings are also declined. Please be cautious when posting; edits will not be valid! Those who have different opinions on the provided answer keys can post discussions the next day, and those who provide solutions or their own opinions regarding the daily question’s answer key will receive appropriate rewards! The focus is on participation, and there are prizes for participating! 1. To effectively control the operating temperature of the tower, ___ temperature is generally used for serial regulation of the top reflux flow rate: 1. Tower top 2. First line 3. Second line. 2. In terms of the automation level of the plant, electric instruments are ___ to pneumatic instruments: 1. Lower than 2. Higher than 3. Equal to. 3. The trays in fuel-type vacuum distillation towers are gradually being replaced by ___ trays: 1. Mesh type 2. Tongue type 3. Packing. 4. The purpose of modifying the low-speed oil transfer line in a vacuum furnace is ____. 1. To reduce the pressure drop and temperature drop in the oil transfer line 2. To increase the temperature at the furnace outlet 3. To reduce the temperature at the furnace outlet. 5. The number of milligrams of potassium hydroxide required to neutralize the acidic substances in 1 gram of petroleum product is called ___. 1. Acidity 2. Acid value 3. pH value. Answers: 2 2 3 1 2