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Chapters : 5,6,7,8,14 Date: 21-09-2011
UK TECHNICAL INSTITUTE , KOTTAKKAL ,MALAPPURAM DT
Answer in short sentences (2 marks each) 1. Define Induction Induction Period? Period? What What is the the typical induction induction period? period? 2. What What are are the the usage usages s of Primer? Primer? 3. What are the the duties duties of inter inter mediate mediate coat? 4. Which two reactions reactions happen happen on induction induction period? Define? Define? 5. Write any four four advantag advantages es of of Water Water borne borne coating? coating? 6. What What is sacrifi sacrificia ciall coat coating ing? ? 7. Name some 2 pack curing curing agents agents with with curing curing time? 8. What are the paints that cured cured by solvent solvent evaporation? evaporation? 9. Write Examples Examples for for Solvent, Solvent, Solute Solute , Solution? Solution? 10.Write are the three terms related to drying /curing temperatures?
Answer the following in three or more sentences (3 Marks each) 11.What is mean by dispersion? What are the types? Explain 12.How paints cured by Oxidation? E.g. ? Is it Reversible or convertible? 13.Differentiate thermo setting and thermo plastic? 14.How a Pinhole Detector Works? 15.Why Different surface need different Paint systems? 16. Explain chemical curing? 17.Why manufactures creates water borne paint system? Name some paints which is modified to use water? 18.Write briefly about moisture tolerant system? 19.What are the voltage ranges available in pinhole detector? For which thicknesses? Which equipment can be used for high thickness paint films ? 20.Answer in one word (a) By which drying mechanism, Single pack epoxy paint dries? (b) What is the solution, if damage occurs to galvanizing? (c) Name an inorganic high temperature service Binder?