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UPSC Civil Service Exam Questions

Q1:

Consider the following statements :
1. About 25% of alumina is brick earth imparts the plasticity necessary for moulding bricks into required shape.
2. Iron pyrite present in brick earth preserves the form of the bricks at high temperatures.
3. Presence of weeds in brick earth makes the bricks unsound.
Which of these statements are correct ?

A 1 and 2

B 1 and 3

C 2 and 3

D 1, 2 and 3

ANS:B - 1 and 3

Iron pyrites in bricks helps to get crystallized. And during burning it disintegrates the bricks. So it is very low in amount.



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