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Q2/1 Fill in the following blanks 1. Building materials are classified according to 1.... 2. Asphalt can be considered as ....... materials 3. The mechanical properties of building materials is considered as a measure of...... 4. Bonding materials must be resisted to like and 5. Lime is one of the constituents of Caso, which is equal to 6. Calcium limes is ....magnesia lime. 7. The reason for choosing the wood as construction materials in hilly areas IS 8. The failure involves either .or of fibers in woods 9. The excess of not favorable when it leads to decay of bricks. 10. In oxidation process of the burning operation of clay bricks, totally............is removed and .........are transformed to (25 Mark) Q3/1 A- What are the factors affecting the mortar materials? explain one of them. B. The weight of a sample of substance is 750 gm and has a volume of 500 cm with a moisture of 12%, find the bulk density of this substance. (25 Mark) 04/1 Answers only two of the following: A- What are the grades of construction works of bricks? B- The sample of substance has a moisture of 13%, weights 800 gm and has bulk density of 1.4 gm/cm. Determine the volume of this substance. C. Find the bulk density of a 450 cm soil sample that weighs 600 g which is the oven dry weight. (25 Mark) Good Luck