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UPSC Civil Service Exam Questions - Engineering

Q1:

Consider the following oxides :
1. Al2O3
2. CaO
3. SiO2
The correct sequence in increasing order of their percentage in an ordinary portland cement is

A 2, 1, 3

B 1, 3, 2

C 3, 1, 2

D 1, 2, 3

ANS:B - 1, 3, 2

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