Gujarat Technological University 2009-3rd Sem B.E Aeronautical Engineering emr , Subject Name: Chemistry for Aereonautical Engg - Question Paper
GUJARAT TECHNOLOGICAL UNIVERSITY
B.E. Sem-III exam December 2009
Subject code: 130102
Subject Name: Chemistry for Aereonautical Engg
Date:21 /12 /2009
Total Marks: 70
Seat No. Enrolment No.
GUJARAT TECHNOLOGICAL UNIVERSITY
B.E. Sem-III Examination December 2009
Subject code: 130102 Subject Name: Chemistry for Aereonautical Engg Date:21 /12 /2009 Time: 11.00 am - 1.30 pm
Total Marks: 70
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
Q.1 (a) Differentiate chemical corrosion from electrochemical corrosion. Discuss the 07 mechanism of electrochemical corrosion.
(b) Enlist the various methods for softening of water. Discuss any one in detail. 07
Q.2 (a) Which are the Elementary principles to calculate amount of air required for 07 combustion of unit quantity of fuel.
(1) Measurement of viscosity of a lubricating oil
(2) Flash and fire- points apparatus.
OR
(b) What are the drawbacks of raw rubber? Give the advantages of vulcanization. 07
Q.3 (a) How polymers can be classified. Discuss any two types in detail. 07
(b) What do you mean by chemical conversion coating? Describe phosphate 07 coating and chromate coating in detail.
OR
Q.3 (a) Write a note on synthetic fibers. 07
(b) Give the properties and uses of common refractory bricks. 07
Q.4 (a) Give a brief comparison of Electroplating and Electroless plating. 07
(b) What causes wind to blow? What are the applications of wind energy? 07 Describe wind mills and generation of electricity through wind mills.
OR
Q.4 (a) In which situation, the thermal insulators are used? Give the characteristics of 07 an ideal thermal insulator.
(b) Describe the application of IR spectroscopy. 07
Q.5 (a) Describe the application of UV spectroscopy. 07
OR
Q.5 (a) Enlist different heat treatment process. Discuss Annealing and quenching in 07 details.
(b) Discuss the physical properties of metals. 07
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