R7100104-applied Chemistry
This document was uploaded by user and they confirmed that they have the permission to share it. If you are author or own the copyright of this book, please report to us by using this DMCA report form. Report DMCA
Overview
Download & View R7100104-applied Chemistry as PDF for free.
More details
- Words: 1,166
- Pages: 4
1
Code No: R7100104
I B.Tech (R07) Regular & Supplementary Examinations, June 2009 APPLIED CHEMISTRY (Civil Engineering) Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ????? 1. (a) What is the principle of EDTA method? Explain the estimation of hardness of water by complexometric method. (b) Mention the dis-advantages of using hard water for industrial purpose. 2. Write short notes on :
[12+4] [5+6+5]
(a) Priming and Foaming (b) Phosphate conditioning (c) Caustic embrittlement. 3. (a) Write a critical account on electrochemical theory of corrosion. (b) How are the metals protected against corrosion by modifying the environment give suitable examples. [8+8] 4. (a) What is the function of accelerators in phosphate coatings? Give examples. (b) How is rust on the metal surface cleaned before electroplating? (c) Explain the following surface preparation: i. Solvent cleaning ii. Pickling & Etching.
[4+4+8]
5. (a) Write the preparation properties and uses of polyurethane. (b) Describe the uses of rubber as an engineering material.
[6+10]
6. (a) Define Refractories and what are the criteria of a good refractory? (b) Give the classification of refractories with suitable examples. [6+10] 7. (a) Distinguish between extreme pressure lubrication & boundary lubrication (b) Describe the functions of viscosity index improvers? Give examples. (c) In what situations semi-solid lubricants are preferred. 8. Write short notes on
[8+4+4] [16]
(a) Raw materials for cement (b) Soundness Test (c) Tensile Strength Test (d) Compressive Strength Test. ?????
2
Code No: R7100104
I B.Tech (R07) Regular & Supplementary Examinations, June 2009 APPLIED CHEMISTRY (Civil Engineering) Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ????? 1. (a) Why is sterilization of water necessary? Discuss any two methods of sterilisation. (b) 0.5 g of CaCO3 was dissolved in dil. HCl and diluted to 1000 mL. 50 mL of this solution required 48 mL of EDTA solution for titration. 50 mL of hard water sample required 15 mL of EDTA solution for titration. 50 mL of same water sample on boiling, filtering etc., required 10 mL of EDTA solution. Calculate the different kinds of hardness in ppm. [9+7] 2. (a) Water having following composition to be softened by lime soda process Ca(HCO3 )2 = 220 ppm, Mg(HCO3 )2 = 56ppm, MgCl2 = 130ppm, MgSO4 = 84ppm, CaSO4 =98ppm, Calculate the amount of lime and soda required to soften 106 litres of water. (b) Explain scale formation and sludge formation in boilers. What are their disadvantages? How are they removed? [8+8] 3. (a) Give suitable reasons: i. Bolt and nut made of the same metal is preferred in practice and ii. Rusting of iron is quicker in sea water than in ordinary water. (b) What is cathodic protection? Explain sacrificial anode method of protection with an example. Mention its merits and demerits . [8+8] 4. (a) Discuss how the surface of a metal is prepared prior to the application of a protective coating. (b) Write the important applications of protective coating. (c) Why is moderate current density employed during electroplating?
[10+4+2]
5. (a) Differentiate between LDPE & HDPE. (b) What are the drawbacks of raw rubber? (c) Write the repeating unit for the following:
[4+8+4]
i. Nylon 6,6 ii. PVC. 6. (a) Write short note on pyrometric cone equivalent. (b) Describe acidic and neutral refractories and their uses.
[6+10]
7. (a) Distinguish between extreme pressure lubrication & boundary lubrication (b) Describe the functions of viscosity index improvers? Give examples. (c) In what situations semi-solid lubricants are preferred.
[8+4+4]
8. What are the chemical constituents of Cement? Discuss the function of each constituent. [16] ?????
3
Code No: R7100104
I B.Tech (R07) Regular & Supplementary Examinations, June 2009 APPLIED CHEMISTRY (Civil Engineering) Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ????? 1. (a) Define carbonate and non carbonate hardness of water. Mention the various dis-advantages of hard water for domestic use. (b) What is meant by sterilization of water? Explain how sterilization of water is carried out by using chlorine and ozone. [6+10] 2. (a) Water having following composition to be softened by lime soda process Ca(HCO3 )2 = 220 ppm, Mg(HCO3 )2 = 56ppm, MgCl2 = 130ppm, MgSO4 = 84ppm, CaSO4 =98ppm, Calculate the amount of lime and soda required to soften 106 litres of water. (b) Explain scale formation and sludge formation in boilers. What are their disadvantages? How are they removed? [8+8] 3. (a) What is electrochemical corrosion and how does it occur? Describe its mechanism. (b) What are corrosion inhibitors? Discuss anodic and cathodic inhibitors with suitable examples. [8+8] 4. Explain in detail the various methods of Chemical conversion coatings.
[16]
5. (a) What is latex? How is natural rubber isolated from it ? (b) Write a note on thermosetting plastics. (c) Write the structural unit of
[5+5+6]
i. SBR ii. Buna - N iii. Silicones. 6. (a) Define Refractories and what are the criteria of a good refractory? (b) Give the classification of refractories with suitable examples. [6+10] 7. (a) Give the functions of lubricants. (b) Describe the mechanism of extreme pressure lubrication. (c) How a viscous lubricant is converted into grease?
[6+4+6]
8. What are the chemical constituents of Cement? Discuss the function of each constituent. [16] ?????
4
Code No: R7100104
I B.Tech (R07) Regular & Supplementary Examinations, June 2009 APPLIED CHEMISTRY (Civil Engineering) Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ????? 1. (a) Define carbonate and non carbonate hardness of water. Mention the various dis-advantages of hard water for domestic use. (b) What is meant by sterilization of water? Explain how sterilization of water is carried out by using chlorine and ozone. [6+10] 2. (a) What are ion- exchange resins? Discuss their application in water softening. How are spent resins regenerated? (b) Write a note on priming and foaming and their disadvantages. [10+6] 3. (a) What is electrochemical corrosion and how does it occur? Describe its mechanism. (b) What are corrosion inhibitors? Discuss anodic and cathodic inhibitors with suitable examples. [8+8] 4. (a) Discuss how the surface of a metal is prepared prior to the application of a protective coating. (b) Write the important applications of protective coating. [10+4+2] (c) Why is moderate current density employed during electroplating? 5. (a) Differentiate between LDPE & HDPE. (b) What are the drawbacks of raw rubber? (c) Write the repeating unit for the following: i. Nylon 6,6 ii. PVC.
[4+8+4]
6. (a) What is pyrometric cone equivalent? How it is be determined for a refractory? What is it significance? (b) Write a very short notes on [6+10] i. Porosity ii. Thermal Conductivity iii. Dimensional Stability iv. Strength. 7. (a) Distinguish between extreme pressure lubrication & boundary lubrication (b) Describe the functions of viscosity index improvers? Give examples. (c) In what situations semi-solid lubricants are preferred. 8. Explain the following : (a) (b) (c) (d)
[8+4+4] [16]
Heat of hydration of cement Soundness of cement Constituents of Portland Cement RCC. ?????
Code No: R7100104
I B.Tech (R07) Regular & Supplementary Examinations, June 2009 APPLIED CHEMISTRY (Civil Engineering) Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ????? 1. (a) What is the principle of EDTA method? Explain the estimation of hardness of water by complexometric method. (b) Mention the dis-advantages of using hard water for industrial purpose. 2. Write short notes on :
[12+4] [5+6+5]
(a) Priming and Foaming (b) Phosphate conditioning (c) Caustic embrittlement. 3. (a) Write a critical account on electrochemical theory of corrosion. (b) How are the metals protected against corrosion by modifying the environment give suitable examples. [8+8] 4. (a) What is the function of accelerators in phosphate coatings? Give examples. (b) How is rust on the metal surface cleaned before electroplating? (c) Explain the following surface preparation: i. Solvent cleaning ii. Pickling & Etching.
[4+4+8]
5. (a) Write the preparation properties and uses of polyurethane. (b) Describe the uses of rubber as an engineering material.
[6+10]
6. (a) Define Refractories and what are the criteria of a good refractory? (b) Give the classification of refractories with suitable examples. [6+10] 7. (a) Distinguish between extreme pressure lubrication & boundary lubrication (b) Describe the functions of viscosity index improvers? Give examples. (c) In what situations semi-solid lubricants are preferred. 8. Write short notes on
[8+4+4] [16]
(a) Raw materials for cement (b) Soundness Test (c) Tensile Strength Test (d) Compressive Strength Test. ?????
2
Code No: R7100104
I B.Tech (R07) Regular & Supplementary Examinations, June 2009 APPLIED CHEMISTRY (Civil Engineering) Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ????? 1. (a) Why is sterilization of water necessary? Discuss any two methods of sterilisation. (b) 0.5 g of CaCO3 was dissolved in dil. HCl and diluted to 1000 mL. 50 mL of this solution required 48 mL of EDTA solution for titration. 50 mL of hard water sample required 15 mL of EDTA solution for titration. 50 mL of same water sample on boiling, filtering etc., required 10 mL of EDTA solution. Calculate the different kinds of hardness in ppm. [9+7] 2. (a) Water having following composition to be softened by lime soda process Ca(HCO3 )2 = 220 ppm, Mg(HCO3 )2 = 56ppm, MgCl2 = 130ppm, MgSO4 = 84ppm, CaSO4 =98ppm, Calculate the amount of lime and soda required to soften 106 litres of water. (b) Explain scale formation and sludge formation in boilers. What are their disadvantages? How are they removed? [8+8] 3. (a) Give suitable reasons: i. Bolt and nut made of the same metal is preferred in practice and ii. Rusting of iron is quicker in sea water than in ordinary water. (b) What is cathodic protection? Explain sacrificial anode method of protection with an example. Mention its merits and demerits . [8+8] 4. (a) Discuss how the surface of a metal is prepared prior to the application of a protective coating. (b) Write the important applications of protective coating. (c) Why is moderate current density employed during electroplating?
[10+4+2]
5. (a) Differentiate between LDPE & HDPE. (b) What are the drawbacks of raw rubber? (c) Write the repeating unit for the following:
[4+8+4]
i. Nylon 6,6 ii. PVC. 6. (a) Write short note on pyrometric cone equivalent. (b) Describe acidic and neutral refractories and their uses.
[6+10]
7. (a) Distinguish between extreme pressure lubrication & boundary lubrication (b) Describe the functions of viscosity index improvers? Give examples. (c) In what situations semi-solid lubricants are preferred.
[8+4+4]
8. What are the chemical constituents of Cement? Discuss the function of each constituent. [16] ?????
3
Code No: R7100104
I B.Tech (R07) Regular & Supplementary Examinations, June 2009 APPLIED CHEMISTRY (Civil Engineering) Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ????? 1. (a) Define carbonate and non carbonate hardness of water. Mention the various dis-advantages of hard water for domestic use. (b) What is meant by sterilization of water? Explain how sterilization of water is carried out by using chlorine and ozone. [6+10] 2. (a) Water having following composition to be softened by lime soda process Ca(HCO3 )2 = 220 ppm, Mg(HCO3 )2 = 56ppm, MgCl2 = 130ppm, MgSO4 = 84ppm, CaSO4 =98ppm, Calculate the amount of lime and soda required to soften 106 litres of water. (b) Explain scale formation and sludge formation in boilers. What are their disadvantages? How are they removed? [8+8] 3. (a) What is electrochemical corrosion and how does it occur? Describe its mechanism. (b) What are corrosion inhibitors? Discuss anodic and cathodic inhibitors with suitable examples. [8+8] 4. Explain in detail the various methods of Chemical conversion coatings.
[16]
5. (a) What is latex? How is natural rubber isolated from it ? (b) Write a note on thermosetting plastics. (c) Write the structural unit of
[5+5+6]
i. SBR ii. Buna - N iii. Silicones. 6. (a) Define Refractories and what are the criteria of a good refractory? (b) Give the classification of refractories with suitable examples. [6+10] 7. (a) Give the functions of lubricants. (b) Describe the mechanism of extreme pressure lubrication. (c) How a viscous lubricant is converted into grease?
[6+4+6]
8. What are the chemical constituents of Cement? Discuss the function of each constituent. [16] ?????
4
Code No: R7100104
I B.Tech (R07) Regular & Supplementary Examinations, June 2009 APPLIED CHEMISTRY (Civil Engineering) Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ????? 1. (a) Define carbonate and non carbonate hardness of water. Mention the various dis-advantages of hard water for domestic use. (b) What is meant by sterilization of water? Explain how sterilization of water is carried out by using chlorine and ozone. [6+10] 2. (a) What are ion- exchange resins? Discuss their application in water softening. How are spent resins regenerated? (b) Write a note on priming and foaming and their disadvantages. [10+6] 3. (a) What is electrochemical corrosion and how does it occur? Describe its mechanism. (b) What are corrosion inhibitors? Discuss anodic and cathodic inhibitors with suitable examples. [8+8] 4. (a) Discuss how the surface of a metal is prepared prior to the application of a protective coating. (b) Write the important applications of protective coating. [10+4+2] (c) Why is moderate current density employed during electroplating? 5. (a) Differentiate between LDPE & HDPE. (b) What are the drawbacks of raw rubber? (c) Write the repeating unit for the following: i. Nylon 6,6 ii. PVC.
[4+8+4]
6. (a) What is pyrometric cone equivalent? How it is be determined for a refractory? What is it significance? (b) Write a very short notes on [6+10] i. Porosity ii. Thermal Conductivity iii. Dimensional Stability iv. Strength. 7. (a) Distinguish between extreme pressure lubrication & boundary lubrication (b) Describe the functions of viscosity index improvers? Give examples. (c) In what situations semi-solid lubricants are preferred. 8. Explain the following : (a) (b) (c) (d)
[8+4+4] [16]
Heat of hydration of cement Soundness of cement Constituents of Portland Cement RCC. ?????
