27438878-r05010104-Applied-Chemistry

27438878-r05010104-Applied-Chemistry - Code.No: 31001 R05...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
R05 SET-1 Code.No: 31001 JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD I .B.TECH –SUPPLEMENTARY EXAMINATIONS JANUARY- 2010 APPLIED CHEMISTRY (CIVIL ENGINEERING) Time: 3hours Max.Marks:80 Answer any FIVE questions All questions carry equal marks - - - 1.a) Explain the processes of “addition” and “condensation” polymerizations giving examples. b) Describe the preparation, properties and uses of i) LDPe ii) HDPE i i i ) L L D P E . [ 8 + 8 ] 2.a) Discuss the preparation, properties and applications of i) Polyurethane rubber and ii) Silicone rubber. b) What are the criteria of a good refractory material? Write about the applications o f r e f r a c t o r y m a t e r i a l s . [ 8 + 8 ] 3.a) Explain the difference between temporary and permanent hardness. What are the units involved in expression of hardness of water? Describe their inter conversion. b) Give a brief account of the methods used in the treatment of water for domestic p u r p o s e s . [ 8 + 8 ] 4.a) Describe the lime-Soda process used for softening of hard water. b) Calculate the quantities of lime and soda used for softening of a water sample obtained form chittoor town in Andhra Pradesh which showed the following analyses :- (Assume that 20,000 litres of this water is to be softened). Ca(NO 3 )=1.64 mg/liter ; Ca(HCO 3 ) 2 =1.62 mg/liter; Mg(SO 4 )=2.40 mg/liter ; MgCl 2 =0.94 mg/liter Mg(NO 3 )=1.20 mg/liter ; Organic impurities = 2.20 mg/liter. [8+8] 5.a) Explain the process of caustic embrittlement. b) Differentiate between pitting corrosion and stress corrosion. c) Write a note on cathodic protection and sacrificial anode. [ 5+5+6 ] 6.a) What are lubricants? How are they classified? Give examples. b) Discuss the following properties of lubricants: i) Viscosity ii) Carbon residue and iii) Saponification number. [8+8]
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
7.a) Describe the processes of tinning and metal cladding. b) What are organic paints? How are they useful? Explain their constituents and their f u n c t i o n s . [ 8 + 8 ] 8. Write notes on any two of the following: a) Lines and their manufacture b) Manufacture of cements c) Setting and hardening of cements. [8+8] ****
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 8

27438878-r05010104-Applied-Chemistry - Code.No: 31001 R05...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online