Building Materials and Construction Important Questions - Set 12 - ObjectiveBooks

Building Materials and Construction Important Questions - Set 12

Practice Test: Question Set - 12

1. Which of the following should be used for hearting of thicker walls?
    (A) Headers
    (B) Stretchers
    (C) Brick bats
    (D) Queen closer

2. Asbestos
    (A) Is an excellent insulator for heat and electricity
    (B) Is fire-proof and acid proof
    (C) Has sp. gravity equal to 3.10
    (D) All the above

3. A heavy stone is suitable for
    (A) Arches
    (B) Rubble masonry
    (C) Roads
    (D) Retaining walls

4. Pick up the correct statement from the following:
    (A) Blisters in the finished wrought iron, are caused due to the reaction between oxide of iron and carbon
    (B) The edges of a finished wrought iron are rough due to red shortage
    (C) Pig iron (charcoal) is manufactured from magnetic ore (Fe3O4)
    (D) All the above

5. The percentage of alumina in a good brick earth lies between
    (A) 5 to 10 %
    (B) 20 to 30 %
    (C) 50 to 60 %
    (D) 70 to 80 %

6. Pig iron made from haematite ores free from sulphur, phosphorus and copper, is known as
    (A) Bessemer pig
    (B) Grey or foundry pig
    (C) White or forge pig
    (D) Mottled pig

7. Le-Chatelier's device is used for determining the
    (A) Setting time of cement
    (B) Soundness of cement
    (C) Tensile strength of cement
    (D) Compressive strength of cement

8. Red short iron cracks when bent due to the presence of
    (A) Sulphur
    (B) Carbon
    (C) Phosphorus
    (D) Silicon

9. Percentage of carbon content in mild steel is
    (A) Less than 0.25
    (B) Between 0.25 and 0.7
    (C) Between 0.7 and 1.5
    (D) Greater than 1.5

10. The method of addition polymerization is used for obtaining:
    (A) Polystyrene
    (B) Polypropylene
    (C) Polyvinylchloride
    (D) All of these

11. Which of the following metamorphic rocks has the most weather resisting characteristics?
    (A) Marble
    (B) Quartzite
    (C) Slate
    (D) Lime stone

12. To retard the initial setting time of cement, the compound responsible, is
    (A) Tri-calcium silicate
    (B) Gypsum
    (C) Di-calcium silicate
    (D) Tri-calcium aluminate

13. Seasoning of timber is done for
    (A) Increasing moisture content
    (B) Decreasing moisture content
    (C) Increasing strength of timber
    (D) None to these

14. The steel used for the manufacture of rails, is
    (A) Bessemer steel
    (B) Mild steel
    (C) Cast steel
    (D) Stainless steel

15. Durability of building stone is affected by its
    (A) Chemical composition
    (B) Texture
    (C) Resistance to atmosphere
    (D) All the above

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