BRICK 4

Question 1

How are bricks classified?

Answer 1

Bricks are classified into unburned (sun-dried or kaccha) bricks and burned (pucca) brick

Question 2

What are unburned bricks also known as?

Answer 2

Sun-dried or kaccha bricks.

Question 3

How are burned bricks further classified?

Answer 3

Burned bricks are classified into first class, second class, third class, and fourth class bricks.

Question 4

What is the minimum compressive strength for class 15 and above bricks?

Answer 4

Greater than 15000 kN/m².

Question 5

What is the maximum water absorption for bricks up to class 12.5?

Answer 5

Not more than 20% by weight.

Question 6

What is the maximum water absorption for bricks of higher classes?

Answer 6

Not more than 15% by weight.

Question 7

How are unburnt or sun-dried bricks dried?

Answer 7

Dried with the help of heat received from the sun after the process of moulding.

Question 8

Where are unburnt or sun-dried bricks used?

Answer 8

In the construction of temporary and cheap structures.

Question 9

Should unburnt or sun-dried bricks be used in places exposed to heavy rains?

Answer 9

No, they should not be used in such places.

Question 10

How are first class bricks prepared?

Answer 10

Table moulded and kiln burned.

Question 11

What are the characteristics of the surface and edges of first class bricks?

Answer 11

Sharp, square, smooth, and straight.

Question 12

Is plastering required for first class bricks?

Answer 12

No, plastering is not required.

Question 13

What are the features of first class bricks in terms of size, shape, and color?

Answer 13

Uniform size, shape, and color.

Question 14

How well are first class bricks burnt?

Answer 14

Well burnt.

Question 15

What is the maximum water absorption of first class bricks?

Answer 15

Not greater than 20%.

Question 16

What is the compressive strength range of first class bricks?

Answer 16

10.5–14 N/mm².

Question 17

For what type of works are first class bricks used?

Answer 17

Superior quality works.

Question 18

How are second class bricks prepared?

Answer 18

Ground moulded and kiln burned.

Question 19

What is the shape of second class bricks?

Answer 19

Slightly irregular and rough.

Question 20

Is plastering required for second class bricks?

Answer 20

: Yes, plastering is required.

Question 21

What is the water absorption range for second class bricks?

Answer 21

20% to 22% of the dry weight of the brick.

Question 22

What is the compressive strength of second class bricks?

Answer 22

Greater than 7 N/mm².
7.5-14

Question 23

Where are second class bricks commonly used?

Answer 23

In places where brickwork is provided with a coat of plaster.

Question 24

How are third class bricks prepared?

Answer 24

Ground moulded and clamp burned.

Question 25

What is the shape of third class bricks?

Answer 25

Irregular and distorted.

Question 26

How are third class bricks burnt?

Answer 26

Under burnt.

Question 27

What is the texture of third class bricks?

Answer 27

: Soft.

Question 28

What is the color of third class bricks?

Answer 28

Light in color.

Question 29

What is the water absorption range for third class bricks?

Answer 29

22% to 25% of the dry weight (not greater than 25%).

Question 30

What is the compressive strength of third class bricks?

Answer 30

3.5–7 N/mm² (greater than 3.5 N/mm²).

Question 31

Where are third class bricks used?

Answer 31

In unimportant and temporary works.

Question 32

What are fourth class bricks?

Answer 32

Over-burned bricks.

Question 33

Where are fourth class bricks used?

Answer 33

As aggregate for concrete in floors, foundations, and roads.

Question 34

What is another name for fourth class bricks?

Answer 34

Jamma❤️ brick. OVERBURNT

Question 35

What is the water absorption range for fourth class bricks?

Answer 35

8% to 10%.

Question 36

What is the compressive strength of fourth class bricks?

Answer 36

300–350 kg/cm².

Question 37

What is the minimum compressive strength for Grade AA bricks?

Answer 37

140 kg/cm

Question 38

What is the minimum compressive strength for Grade A bricks?

Answer 38

105 kg/cm².

Question 39

What is the minimum compressive strength for Grade B bricks?

Answer 39

70 kg/cm².

Question 40

What is the minimum compressive strength for Grade C bricks?

Answer 40

35 kg/cm².