Question

QUTE IV Spring 2018 MEET 1134 Chapters 9, 10, 11 17. Ethanol is made by the process b. transesterification of fatty acids c. all of the above d. none of the above of 11 a. fermentation and distillation of sugars/starches 18.is the joining ot similar materials. 10 a. Setting c. Adhesion d. Cohesion b. Curing structure depending upon? 7 a. silica content 19.With regards to glass, it can have an amorphous ox crystalline b. heat treatment method c. lead alkali content d. all of the above 20. is formed in the transesterification reaction, separates and falls to the bottom of the container. 11 a. Heptane b. Esters c. Glycerol d. Carbon dioxide 21. The primary grading system used for motor fuels is the rating. 11 a. research b. heptane c. octane d. motor 22.A chemical reaction that produces energy in the form of light, heat and/or electricity is called a. exothermic b. endothermic c. isotropic d. none of the above 23. A 10W-30 weight oil exhibits which of the following properties? 11 a. 10 weight at higher temperatures, 30 weight at lower temperatures b. 10 weight at lower temperatures, 30 weight at higher temperatures c. exhibits an average viscosity of (10+30)/2 d. exhibits a 10 weight viscosity at temperatures above 30°F

Answer 1

17.

Answer: (a)

Explaination: Fermentation is the process in which yeast breaks down sugar into alcohol fermentation is the process in which yeast breaks down sugar into alcohol such as ethanol. But transesterification of fatty acid with ethanol gives biodiesel.

18.

Answer: (c) Adhesion

Explaination : Adhesion is the process in which two similar materials are joined by Van Der Waals force (attraction force between molecules of materials.)

19. Answer : (d) All of the above

Explaination : Properties of glass being amorphous or crystline depends or silica content, cooling rate and content of lead alkali. With high alkali content the glasses have relatively high thermal expansion coefficients.

20. Answer : (c) Glycerol

Explaination: After the transesterification process, top layer is biodiesl and bottom layer is glycerol.