The most important purpose of frog in a brick is to
Consider the following statements:
1. About 25% of alumina in brick earth imparts the plasticity necessary for moulding bricks into required shape.
2. Iron pyrite present in brick earth preserves the form of the bricks at high temperatures.
3. Presence of weeds in brick earth makes the bricks unsound.
Which of these statements are correct
Match List-l (Cement Mortar for different work) with List-Il (Proportion of cement sand in mortar) and select the correct answer using the codes give below the lists:
The position of brick cut to form angles other than right angles in plan, is known as
Consider the following statements: Bricks are soaked in water before use in masonry work
1. to remove dust
2. to remove air voids.
3. so that they do not absorb water from cement mortar.
Which of these statements is/are correct?
Which one of the following procedure is applied to determine the soundness of bricks?
The bricks which are extensively used for basic refractories in furnaces are
For good bonding in bricks uniform in size
For getting a good brick bond,
(i) the amount of lap should be one-fourth brick along the length of the wall and one-half brick across the thickness of wall.
(ii) the brick should be of uniform size to get uniform lap.
(iii) the stretchers should be used in the facing.
(iv) the use of brick bat should be discouraged except under special circumstances.
(v) the vertical joints in the alternate courses should be vertically above each other.
The type of decay in timber dry rot is due to
A relatively high water absorption of a common burnt clay brick indicates