A. cracking and warping of bricks
B. loss of cohesion
C. enhancing the impermeability of bricks
D. none of the above
Related Mcqs:
- 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% - Which of the following ingredients of the brick earth enables the brick to retain its shape ?
A. alumina
B. silica
C. iron
D. magnesia - Excess of alumina in brick earth makes the brick______________?
A. impermeable
B. brittle and weak
C. to lose cohesion
D. to crack and warp on drying - 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 - 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 - 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% - 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 - Crushing strength of a first class brick should not be less than_____________?
A. 3.5 N/mm2
B. 7.0 N/mm2
C. 10.5 N/mm2
D. 14.0 N/mm2 - 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 - 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
