Civil Engineering - Building Materials - Discussion

The answer should be D, the metallic ringing sound is for the first class brick.

What will the correct answer? anybody explain it.

These are also fully burnt and give a clear ringing sound when struck together. Slightly irregularities in shape, size or color are accepted.

Its compressive strength shall not be less than 70 kg/cm2 and absorption value should not be greater than 22 percent when soaked for 24 hours in water.

Slight difference in the structure on fractured surfaces is admissible.

Use: For exterior work when plastering is to be done. And can also be used for interior works but they may not be used for flooring.

Note : under burnt brick is 3rd class brick.

I think d is correct answer Because well burnt and metallic sound came after struck and are well burnt are the property of first-class brick so d is the correct answer.

Under burnt is the correct answer.

As per my knowledge B is right.

@Dev.

I think you have bunked your classes.

D is right.

Specification of Second Class Bricks.

They shall be well burnt or slightly over burnt.
They must give clear ringing sound when struck.

Option a b c are the property of class a brick D is the right answer.