Excess of alumina in brick earth makes the brick______________?

Related Mcqs:

1. The main function of alumina in brick earth is_______________?

   A. to impart plasticity
   B. to make the brick durable
   C. to prevent shrinkage
   D. to make the brick impermeable

2. 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%

3. Which of the following ingredients of the brick earth enables the brick to retain its shape ?

   A. alumina
   B. silica
   C. iron
   D. magnesia

4. Excess of silica in brick earth results in______________?

   A. cracking and warping of bricks
   B. loss of cohesion
   C. enhancing the impermeability of bricks
   D. none of the above

5. The frog of the brick in a brick masonry is generally kept on______________?

   A. bottom face
   B. top face
   C. shorter side
   D. longer side

6. Percentage of silica in a good brick earth lies between_______________?

   A. 5 to 10%
   B. 20 to 30%
   C. 50 to 60%
   D. 70 to 80%

7. Which of the following pairs gives a correct combination of the useful and harmful constituents respectively of a good brick earth ?

   A. lime stone and alumina
   B. silica and alkalies
   C. alumina and iron
   D. alkalies and magnesium

8. In brick masonry the bond produced by laying alternate headers and stretchers in each course is known as_______________?

   A. English bond
   B. double flemish bond
   C. zigzag bond
   D. single flemish bond

9. The stretcher bond in brick masonry can be used only when the thickness of wall is_____________?

   A. 90 mm
   B. 180 mm
   C. 190 mm
   D. 280 mm

10. The proportions of lime and sand in the mortar normally used in brick construction are_______________?

    A. 1:2
    B. 1:4
    C. 1:6
    D. 1:8