Building Materials, Third Edition

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 RQU

12. (a) What are the different types of paints used for protecting steel structures in coastal
    regions?
    (b) What preparatory work should be done before repainting an old painted surface?


13. (a) Describe the procedure of following:
    (a) Painting of new wood work
    (b) Painting of an old iron work
    (c) Painting of a plastered surface
    (d) Distempering
    (e) Varnishing

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1. Match List-1 with List-II and select the correct answer using the codes given below the
   lists:
   List-I List-II
   A. Pigment 1. Turpentine
   B. Drier 2.Iron oxide
   C. Thinner 3. Zinc sulphate
   D. Extender 4. Aluminium silicate
   Codes:
   (a)AB CD (b)AB CD
   3214 3241
   (c)AB CD (d)AB CD
   2314 2341


2. The function of base in paint is
   (a) to provide a film on surface
   (b) to hide imperfections of surface
   (c) to reduce shrinkage cracks in paint film
   (d) to bring down the overall cost


3. Which of the following is not a vehicle in paints?
   (a) Linseed oil (b) Poppy oil
   (c) Turpentine oil (d) Tung oil


4. Which of the following is not a drier in paints?
   (a) Lead oxide (b) Lead acetate
   (c) Red lead (d) Lithophone


5. Which of the following is not a defect in paints?
   (a) Blistering (b)Stopping
   (c) Crocodiling (d) Foxiness


6. In fire proof paints, the main constituent is
   (a) Aluminium powder (b) Red lead
   (c) Copper powder (d) Asbestos fibres


7. Which of the following is not a varnish?
   (a) Spar varnish (b) Flat varnish
   (c) Asphalt varnish (d) Methyl varnish