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- 1%99 |I. A:PY Efflorescence in cement is caused due to an excess of Iron oxide K20 and Na203 Silica Alumina Alkalis Inert material of a cement concrete mix, is Cement Coarse aggregate Fine aggregate Water None of these Dage 3. of 5 II25 - Which of the information given about gypsum and lime is wrong?A) The calcination temperature of lime is higher than that of plaster.B) The specific surface of lime is greater than that of plaster.C) The cohesiveness of gypsum is lower than that of lime.D) Gypsum is more resistant to water than lime.E) Lime releases higher heat during hydration than plaster.Lla 3 The black color in bricks results due to alumina O magnesia O iron oxide O gravel O
- 8. Which of the following constituent in earth gives plasticity to mould bricks in suitableshape? * Silica Lime Alumina O MagnesiaLos Angeles abrasion test evaluates the aggregates' soundness and durability. Select one: O True OFalseWhen the deposits of efflorescence is more than 10 percent but less than 50 percent of the exposed areas of brick, the presence of efflorescence is classified as: 1. Serious 2. 3. 4. Slight Heavy Moderate
- During the construction of the waffle slab, they use _____ in the shuttering to shape the waffle slab. Pods and Blocks. Pods Hardy Blocks Steel and hardy blocks- Sand -lime bricks are hardened by firing in continuous kiln firing with clamps steaming in an outoclave continuous spraying with water45. Which paint contains polystyrene as a base? A. O Synthetic rubber B. O Enamel C. O Aluminium D. O Emulsion