a) Shape and Size: In this, a brick is closely inspected. It should be of standard size and shape and should be truly rectangular with sharp edges.
b) Soundness: In this, when two bricks are struck with each other, clear ringing sound should be produced.
c) Hardness: In this, when a scratch is made on brick surface with the help of finger nail, no impression should be made on the brick.
d) Colour: The colour of the bricks should be reddish brown
e) Water absorption test: After immersing the bricks in water for 16 hours, it should not absorb more than 20% water of its weight.
f) Dropping test: In this test, when the burnt clay bricks are dropped flat on hard ground from a height of about 1m, it should not crush into pieces. This indicate good strength of brick.