Pick up the constituent of good brick earth whose excess causes the raw bricks shrink and warp during drying and burning, from the following :

A)
Alumina
B)
Lime
C)
Magnesia
D)
Ironoxide

Correct Answer :   Alumina

Recently Updated in Building Materials Questions
The proportions of charcoal, saltpetre and sulphur in gun powder by weight, are respectively :
A)
75, 10, 15
B)
10, 15, 75
C)
15, 75, 10
D)
10, 75, 15.

Correct Answer : Option (C) :   15, 75, 10

A 1st class brick immersed in water for 24 hours, should not absorb water (by weight) more than ____
A)
10%
B)
15%
C)
20%
D)
25%

Correct Answer : Option (C) :   20%

According to IS 399-1963, the weight of the timber is specified at ______
A)
12% moisture content
B)
14% moisture content
C)
8% moisture content
D)
10% moisture content

Correct Answer : Option (A) :   12% moisture content

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