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biology - Set No 1 Code No RR10104 I B.Tech Supplimentary...

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Code No: RR10104 Set No. 1 I B.Tech Supplimentary Examinations, Aug/Sep 2008 APPLIED CHEMISTRY (Civil Engineering) Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ⋆ ⋆ ⋆ ⋆ ⋆ 1. (a) What is corrosion? How is it different from erosion? Explain the term passivity with suitable examples. [8] (b) Give an account of the oxidation corrosion with relevant chemical equations involved. [8] 2. Differentiate the following with suitable examples (a) Cathodic coatings with anodic coatings. [8] (b) Metal cladding and metal spraying. [8] 3. Present an account of the composition and advantages of the following organic coatings (a) Enamels [5] (b) Distempers [6] (c) Lacquers. [5] 4. Describe the structure, preparation and uses of (a) Bakelite [8] (b) Nylon (6,6) [8] 5. (a) Explain the phenomena of scale and sludge formation in boilers. [8] (b) Discuss the lime-soda process for softening of hard water. [8] 6. (a) Explain the term “municipal water”. [4] (b) Summarize the treatment processes used to obtain municipal water. [4] (c) Calculate the lime and soda in Kgs required to soften 30,000 litres of water containing CaSO 4 = 136 ppm, MgCl 2 = 95 ppm, Ca(HCO 3 ) 2 = 162 ppm & Mg(HCO 3 ) 2 = 73 ppm. [8] 7. (a) Outline the important characteristics of refractories. [8] (b) Differentiate between the different types of insulating materials. [4] (c) Explain the use of silicone fluids as insulating materials. [4] 8. Explain the dry process for the manufacture of cement and chemical composition of cement. [16] ⋆ ⋆ ⋆ ⋆ ⋆ 1 of 1
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Code No: RR10104 Set No. 2 I B.Tech Supplimentary
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