Worksheets30/01/2026-overseer grade3-brick
Total questions: 10
Worksheet time: 5mins
Name
Class
Date
1.
What is the standard (modular) size of a brick as per the Bureau of Indian Standards (BIS)?
a)
20 cm x 10 cm x 10 cm
b)
19 cm x 9 cm x 9 cm
c)
23 cm x 11.4 cm x 7.6 cm
d)
19 cm x 10 cm x 10 cm
2.
Which constituent of brick earth is primarily responsible for providing plasticity for easy moulding?
a)
Silica
b)
Magnesia
c)
Alumina
d)
Iron Oxide
3.
An excess of Silica in brick earth results in which of the following defects?
a)
The brick becomes brittle and loses cohesion
b)
The brick melts and loses its shape
c)
The brick turns dark blue or black
d)
The brick warps and cracks during drying
4.
The primary purpose of providing a Frog in a brick is to
a)
Reduce the weight of the brick
b)
Form a shear key for mortar bonding
c)
Indicate the manufacturer name only
d)
Increase the thermal insulation
5.
White salt deposits on the surface of a brick wall caused by the presence of alkalis is known as
a)
Slaking
b)
Warping
c)
Efflorescence
d)
Fusion
6.
What is the role of Lime in the composition of good brick earth?
a)
It gives the brick a yellow tint
b)
It acts as a flux to fuse silica
c)
It provides plasticity
d)
It prevents the brick from being brittle
7.
The presence of Iron Pyrites in brick earth leads to
a)
Improved mechanical strength
b)
A deep red color
c)
Disintegration of the brick
d)
Reduced efflorescence
8.
For a modular brick the geometric relationship between Length L Width B and Mortar Thickness T is
a)
L = B + 2T
b)
L = 2B + T
c)
L = 2B + 2T
d)
L = B + T
9.
Assertion A ;Alumina should be present in the range of 20 to 30 percent in good brick earth
Reason R; Excess alumina causes the brick to melt and lose its shape
a)
Both A and R are true and R is the correct explanation of A
b)
Both A and R are true but R is NOT the correct explanation of A
c)
A is true but R is false
d)
A is false but R is true
10.
Assertion A The frog of a brick is always placed facing upwards during masonry construction
Reason R; Placing the frog upwards ensures it is completely filled with mortar creating a strong shear key
a)
Both A and R are true and R is the correct explanation of A
b)
Both A and R are true but R is NOT the correct explanation of A
c)
A is true but R is false
d)
A is false but R is true
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