Question

Match the Grade of bricks with its compressive strength (According to IS: 10719557-1970) and select the correct answer as per the codes given below:

Compressive strength	Grade
A. Not less than 140 kg/cm2	I. Grade A
B. Not less than 105 kg/cm2	II. Grade A-A
C. Not less than 70 kg/cm2	III. Grade B
D. Not less than 35 kg/cm2	IV. Grade C

1. (A) - (I), (B) - (III), (C) - (II), (D) - (IV)
2. (A) - (I), (B) - (II), (C) - (III), (D) - (IV)
3. (A) - (IV), (B) - (II), (C) - (III), (D) - (I)
4. (A) - (II), (B) - (I), (C) - (III), (D) - (IV)

Answer 1

Correct Answer - Option 4 : (A) - (II), (B) - (I), (C) - (III), (D) - (IV)

Concept:

According to IS: 10719557 - 1970, following classification has been made for bricks on the basis of compressive strength:

Classification	Compressive Strength
Grade A-A	> 140 kg/cm2
Grade A	> 105 kg/cm2
Grade B	> 70 kg/cm2
Grade C	> 35 kg/cm2

 

Note: 

• Grade A brick is also known as First Class Brick
• Grade B brick is also known as Second Class Brick
• Grade C brick is also known as Third Class Brick