One Question per Day on Refining Knowledge (Technology) 110126
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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 rating charm is prohibited. Friendship requests and duplicate ratings are also declined. Please be cautious when posting; edits will not be effective! 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. As the specific gravity index of the oil increases, the viscosity of the oil _____. (1) Increase (2) Decrease (3) Remain unchanged (4) Gradually increase significantly. 2. The amount of lubricating oil injected is generally controlled at the ________ of the bearing box level gauge. (1) Highest level (2) 1/2–1/3 (3) 1/3 (4) 2/3 or more. 3. Depending on the amount of heat recovered through mid-stage reflux, the maximum steam load in the column may be located below the first tray, or it may be near ____. (1) The tray where mid-stage reflux is extracted (2) The first side stream downstream of the mid-stage reflux (3) The tray where mid-stage reflux is returned (4) The lowest side stream. 4. In the chemical classification of crude oil, the most commonly used methods are the ______ classification method and the classification based on key distillation characteristics. (1) Characteristic factor (2) Sulfur content (3) Density (4) Aromatic hydrocarbon content. 5. When the saturated vapor pressure reaches equal to the external pressure at a certain temperature, boiling occurs; this temperature is called _____. (1) Bubble point (2) Dew point (3) Boiling point (4) Actual boiling point. Answers: 2, 2, 1, 1, 3
(2) (3) (1) (2)(3)
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1. As the specific gravity index of the oil increases, its viscosity ___1__. 7 b- @8 `9 P5 G: `0 }. r(1) Increase (2) Decrease (3) No change (4) Gradually increase significantly 9 p) i" a: U' (1) Highest level (2) 1/2–1/3 (3) 1/3 (4) Over 2/3 8 f( B: K; i$ E; {0 p/ ]' o" q# C 3. Depending on the amount of heat recovered through mid-stream reflux, the maximum steam load in the tower may still be located below the first tray, or it may be around ___2_. $ p2 v8 H" ~8 |; ?5 G (1) Tray for mid-stream reflux extraction (2) First side stream downstream of the mid-stream reflux (3) Tray for mid-stream reflux return (4) Lowest side stream “ E% W4 ^" }) R' W8 }0 t, Y 4. In the chemical classification of crude oil, the most commonly used methods are the ___1___ classification method and the classification based on key distillation characteristics. & ~* i( Z; z: j(1) Characteristic factor (2) Sulfur content (3) Density (4) Aromatic hydrocarbon content 1 f$ e3 D7 G6 Q7 B) z: c, p4 D5. When a certain temperature is reached at which its saturated vapor pressure equals the external pressure, boiling occurs; this temperature is called ___1__.% U w8 Z. F1 s& S1 h6 p, n7 J) r5 L0 f (1) Bubble point (2) Dew point (3) Boiling point (4) Actual boiling point : I* K1 f6 e# F4 M. h) T( ^# R
1. As the specific gravity index of the oil increases, its viscosity __1___. & (1) Characteristic factor (2) Sulfur content (3) Density (4) Aromatic hydrocarbon content * e* l0 s( ^- j% T+ x+ j 5. When a certain temperature is reached and its saturated vapor pressure equals the external pressure, boiling occurs; this temperature is called ___3__. 7 ]) w* c- U3 q \8 v; j(1) Bubble point (2) Dew point (3) Boiling point (4) True boiling point) u9 E2 x+ {8 J% P
(2)(3)(3)(1)(3)
Reply 1# chengkang 1、(1) 2、(2) 3、(2) 4、(3) 5、(1)
The answers are 2, 3, 1, 4, 3 in that order. I really don’t know; it seems complicated to me. Please forgive me, original poster.