11. Which one of the following polymers is obtained from condensation polymerization?
12. The rocks in which argil (or clay) predominates, are called
13. The trunk of tree left after cutting all the branches is known as
14. A badly mixed cement concrete results in
15. Minimum thickness of wall where single Flemish bond can be used is
16. The commonly used base for iron and steel work, is
17. When a brick is immersed in water for 24 hours and then dried, if
18. In a mortar, the binding material is
19. Lime mortar is generally made with
20. Advantage of a clamp compared to a kiln for burning bricks is that
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