7. Statement: There are at least seven trays in the fractionating tower. How Does An Oil Refinery Work? 1 Before crude oil can be used, it has to be processed in a refinery and converted into many different products. Oil is first distilled, which breaks it down into gas, petrol, paraffin lubricating oil, diesel, and other fuel oils and asphalt. This is done by heating the crude oil, which is pumped to the bottom of a tall steel tube 5 called a "fractionating tower"This tower is divided into compartments all the way up and the very hot petroleum enters to the bottom of the tower as a vapor . Crude oil is made up of a number of different ingredients and each of these boils and vaporizes at a different temperature. The vapors at the bottom of the tower are the hottest, and those at the higher levels are cooler. At the bottom of each 10 compartment in the tower are trays, and the different vapors condense, or turn into liquid, on the trays at different levels. Petrol collects in the top trays, paraffin condenses a little lower down and the other oils become liquids at even lower levels. In this way,the crude oil is separated into the various fractions, which are drawn off ready for further refining. (MEDSP,1989:15) A. True B. False C. Not Given 5 poin 8. Identify the underlined word or phrase A, B, C , or D that would not be accepted in standard written English A battery, by definition, consisting of a group of two or more primary or secondary battery cells, which convert chemical energy into electrical energy. C A. B. C. D. 2 poin

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$7. Statement: There are at least seven trays in the fractionating tower. How Does An Oil Refinery Work? 1 Before crude oil can be$

7. Statement: There are at least seven trays in the fractionating tower. How Does An Oil Refinery Work? 1 Before crude oil can be used, it has to be processed in a refinery and converted into many different products. Oil is first distilled, which breaks it down into gas, petrol, paraffin lubricating oil, diesel, and other fuel oils and asphalt. This is done by heating the crude oil, which is pumped to the bottom of a tall steel tube 5 called a "fractionating tower"This tower is divided into compartments all the way up and the very hot petroleum enters to the bottom of the tower as a vapor . Crude oil is made up of a number of different ingredients and each of these boils and vaporizes at a different temperature. The vapors at the bottom of the tower are the hottest, and those at the higher levels are cooler. At the bottom of each 10 compartment in the tower are trays, and the different vapors condense, or turn into liquid, on the trays at different levels. Petrol collects in the top trays, paraffin condenses a little lower down and the other oils become liquids at even lower levels. In this way,the crude oil is separated into the various fractions, which are drawn off ready for further refining. (MEDSP,1989:15) A. True B. False C. Not Given 5 poin 8. Identify the underlined word or phrase A, B, C , or D that would not be accepted in standard written English A battery, by definition, consisting of a group of two or more primary or secondary battery cells, which convert chemical energy into electrical energy. C A. B. C. D. 2 poin

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Answer 1

7. A. True

The passage explicitly states that the fractionating tower is "divided into compartments all the way up" and that "At the bottom of each compartment in the tower are trays". While the exact number isn't specified, the description implies there are *at least* seven trays, given the multiple compartments and the description of different fractions condensing at different levels.

8. C. which convert chemical energy into electrical energy

The phrase "which convert chemical energy into electrical energy" is a nonrestrictive clause awkwardly placed within the definition. A more grammatically correct and concise way to write this would be to integrate this information directly into the main clause. For example: "A battery, by definition, is a group of two or more primary or secondary cells that convert chemical energy into electrical energy." The original phrasing is grammatically incorrect because it creates a comma splice.

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