Model Examination Grade 2 Ver 2.doc

BGAS PAINTING INSPECTION GRADE II

Time 1½ Hrs

Tick the correct answer from the choice 1. In corrosion circuit do electrons flow from a. Anode to cahode b. Cathode to electrolyte c. Cathode to anode d. Anode to electrolyte 2. Paint contamination, is a reason for a. Osmotic blister b. Bittiness c. Un even profile d. Chalking 3. Copper/Copper sulphate half cell electrode is used to a. Monitor CP Voltage b. Supply current for CP c. Detect Millscale d. Rectify AC to DC 4. If 5 Liters Paint weighs 6.75 Kg, Density is ______ a. 0.74 gm/cc b. 0.74 c. 1.35 gm/cc d. 1.35 5. Colour Brightness can be specified by the term a. Chroma b. Intencity c. Weight d. Reflectance value 6. Advantage of eccentric wheel for wft measurement is a. b. c. d.

Correct DFT can be calculated from result Permanent record No other method for curved surface Can be used for metal spray methode

7. Example for suspension a. Water Based Emulsion b. Oil Mixed With Water c. Salt Water d. Pigmented paint 8. Which paint is specified to use on repair areas of galvanising a. TSA b. Zinc Rich Epoxy c. Urethane d. Alkyd Resin

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9. Which binder have no problem to overcoat on white spirit based binder a. Alkyds b. Epoxy c. CR d. Natural Resin 10. Which metal corrode fast according to bimetallic principle a. Less electronegative b. More Electropositive c. More noble d. Less Noble 11. High pressure abrasive blasting operates at which pressure a. 100 psi b. 2500 psi c. 20000 psi d. 30000 psi 12. Too much binder to solid ratio gives a. Good Opacity b. Good Gloss c. Cohesive Strength d. Porous Film 13. Specular Hematite is commonly called a. Millscale b. Rust c. MIO d. Iron Sulphate 14. Which application method provides uniform film thickness a. Stripe coat b. Airless Spray c. Conventional spray d. Electrostatic spray 15. Which paint is more suitable for hot duty surface above 150ᵒ C a. Zinc Silicate b. High Solid Epoxy c. Urethane d. CR 16. Which surface preparation is used for weathered galvanising a. Sweep Blast b. Stiff Bristle Brushing c. Through Blast d. Sa2½ 17. Amplitude is a term associated with a. Dry film thickness b. Wet film thickness c. Matt Film d. peak to trough height 18. Which solvent group is suitable for chlorinated rubber paints a. Xylene b. Ketones c. Water d. White Spirit

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19. a. b. c. d. 20. a. b. c. d.

Which coating fault will look like discoloration Chalking Bleeding Cissing Curtaining Degree of cleanliness not depends Time spent on area Angle of impingement Velocity of the particles Substrate rust grade

Narrative Questions. 1. Define Induction Periode? Explain the two chemical reaction during Induction periode? What is the approx. time ?

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2. What are the differences between thermosetting and thermo plastic with eg.? ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

3. How flash point can be calculated? ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------4. Explain day to day activities of an inspector?

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5. How much paint required to coat a circular area of diameter 8 Meters at a Wft of 120 um? -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------6. Explain pull of adhesion test? ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------7. How to use of Ford flow cup Nᵒ4? -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------8. How the coating fault bleeding can be avoided? How to identify the fault? ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------BGAS PAINTING INSPECTION GRADE II 4

----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------9. What are the two methods of CP? Explain any one? -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------10.How to detect a pinhole in a dry paint film? ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------11.How atomisation achieved in conventional and airless spray? -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------12.Explain the advantages and disadvantages of electrostatic spray ?

----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------13.How Zinc metal can be sprayed with Wire and Pistol system? ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------BGAS PAINTING INSPECTION GRADE II 5

----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------14.What are the requirements and responsibilities for site safety? -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------15.Name any five coating fault with basic reasons? ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

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