What happens to raw bricks if an excess of alumina is present?
What is the harmful effect of presents of alkali in brick earth on bricks?
How many constituents are there in the brick earth?
Excess of oxides of iron makes the brick:
Which one of the below is the most important ingredient in the brick earth?
In what form should lime be present in the brick earth?
Loamy, mild or sandy clay has __________ percentage of alkali?
Which of the following leads to the formation of small pores in brick?
Why do bricks become brittle when excess silica is present?
The main ingredient of a good quality brick earth, is
How many types of the brick earth are there?
Clay and silt content in a good brick earth must be at least
Carbonaceous material in small amounts is good for the brick earth.
The presence of which of the below renders clay totally unsuitable for brick manufacture?
Field test for strength of good brick is to drop it from a height of