Cochin University of Science and Techology (CUST) 2006 B.Tech Civil Engineering Engineering Chemistry - Question Paper
BTS(C) -1 - 06- 004(A)
B. Tech. Degree I & II Semester (Combin ed) Examination, June 2006
IT/CSEC/CE/ME/SE/EB,1EI/EE 104 ENGINEERING CHEMISTRY
(Common)
Time: 3 Hours Maximum Marks: 100
Write a note on BOD. (5)
a)
b) c)
a)
b)
What are disinfectants? Give any three methods for the disinfection of water. (6)
What is water softening? Explain the ion exchange method for water softening. (9)
OR
How are BOD and COD experimentally determined? (5) 20ml of standard hard water (containing 15g calcium carbonate per litre) required 25ml of EDTA solution for endpoint. 100ml of water sample required 18ml EDTA solution while same water after boiling required 12ml EDTA solution. Calculate
11
carbonate and non carbonat j hardness of water. (6)
Explain scale sludge formation in boilers. (9)
c)
a)
b) c)
What are the constituents of varnish? (5)
III
IV
Distinguish between galvar ic corrosion and pitting corrosion. (6) Write a note on:
(i) tinning (ii) phosphate coating
OR
Give any two methods of c eaning articles before electro deposition. (5)
a)
b) c)
a)
b) c)
a)
b) c)
a)
b) c)
a)
b) c)
a)
b) c)
Write a note on cathodic protection. (6)
Explain any three theories cf corrosion. (9)
Give the working of hydrogenoxygen fuel cell. (5)
V
VI
VII
VIII
IX
Write a note on electrode potential. (6)
Derive Nemst equation for Daniel cell. (9)
OR
What is a standard cell? Give an example. (5)
What is a standard hydrogen electrode? Give its use. (6)
What is a concentration cell? Give its applications. (9)
Explain the manufacture of water gas. (6)
Write a note on proximate i nalysis of coal. (6)
What is calorific value of a fuel? How it is derived for a sol i'd fuel. (8)
OR
Write a note on reforming. (6)
Write a note on solid lubricant. (6)
Explain the manufacture of coke by Otto Hoffmans by-prodi ct oven method. (8)
Write a note on vulcanization of rubber. (5)
Distinguish between emulsion polymerization and suspension polymerization. (6) Write notes on.
i) amino resin ii) polyster
OR
Write note on silicone resins. (5)
Distinguish between compression moulding and extrusion me ulding. (6) Write notes on :
(i) nylon (ii) bakelit;
(iii) nitrite rubber (9)
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