BE (1st Semester)
Examination – 2006-07
Note : Solve all the five questions . AH questions carry equal marks
Q1 Solve any four parts :
(a) Calculate hardness of 0.01 m solution of MgCI2 in ppm.
(b) Use the following experimental observations to determine the type and amount of
alkalinity in mg/1 of alkalin water sample.
(a) Water used for titration 50ml
(b) Phenolphthalein end point 20ml
(c ) Methyl orange and point 40ml
(d)Acid used for titration N/50
Q2 (a) Why , even dissolved in traces MgCI2 is dangerous for boilers
(b)What do you mean by internal treatment?
(c)Calculate the amount of lime (84%pure) and soda (92%) pure) required for
Treatment of 20,000 liters of water . Which when analyzed gave following results.
Ca(HC03)2= ppm, Mg(HC03)2=36.3 ppm
MgS04= 30.33ppm, CaS04= 34.00 ppm,
CaCl2= 27.75ppm and NaCl= ppm. Molecular
Mass of above salts are – 162 , 146, 120, 136, 111 and 58.5 respectively
Q3 (a) What is zeolite?
(b) What is deionised or demineralised water? What is hardness of such water prepared for
high pressure boilers ?
(c) Write a short note on any one of the following:
(a) Priming and Foaming
(b) Phosphate Conditioning
Q4 (a) Define ‘Knocking ‘ and Octane number of gasoline
(b) Name the factor assessed in proximate and ultimate analysis of coal
(c )What is the important of analysis of flue gases ?
Q5 Write short notes on any two of the following :
(i) Difference in low and high temp. Carbonization of coal
(ii) Diesel engine fuels
(iii) Advantage of liquid fuels over solid fuels
Q6 (a) 0.72 gram of a fuel containing 80% carbon when burnt in a bomb calorimeter, increased
the temperature of water from 27.3°C to29.1°C . If calorimeter contains 250gms of water
and its water equivalent is 150 gms calculate the HCV of the fuel . Give your answer in kJ/kg.
(b) Give an account of recovery of by — products of Otto Hoffman ‘s oven.
Q7 (a) Describe electrochemical corrosion of iron in neutral medium
Explain wet mechanism of corrosion of iron in neutral condition with diagram only.
(b)What is battery?
(c)What is cell voltage?
Q8 (a) Define corrosion .
(b)Explain water line with well labeled diagram.
(c )What is fuel cell ?
Q9 (a) Write short notes on any one of the following:
(b) What is recharging of a battery?
Q10 (a) What are the functions of a lubricant?
(b) Give average compound composition of Portland cement along their Setting time.
Give characteristics of important constituents
Q11 (a) Give ISI specification of Portland cement.
(b) Write a short note on poly-Vinyl Chloride .
Q12 (a) What are the raw materials for Nylon 6:6?
(b)Explain with reason the role of Gypsum in Portland cement
(c)Give differences between thermoseing thermoplastic resins
Q11 a) Write short note on preparation , properties and of normal superphosphate and Acylonitril.
(b)What are the characteristics of an explosive ?
(c)What is rocket propellant ?
(d)What is RDX (chemically) ?
Q.12(a) Write short notes on Ammonium nitrate and cellule accede.
(b)Give classification of explbSives along With the characteristics
(c)What is a monopropellant *? Give an example.
(d)Give uses of explosives ?
Q.13(a) Write a method of preparation , properties and uses Ammonium sulphate.
(b) Write a note on cartoon tetrachloride .
(c) Why ethanol is added to chloroform ?
(d) Give important characteristics of a good propellant.
(e) Detonators are used in conjunction with high explosives,why ?