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UPSC Civil Service Exam Questions - Engineering

Q1:

Consider the following statements :
The effect of air entrainment in concrete is to
1. increase resistance to freezing and thawing.
2. improve workability.
3. decrease strength.
Which of these statements are correct ?

A 2 and 3

B 1 and 3

C 1 alone

D 1, 2 and 3

ANS:D - 1, 2 and 3

No answer description is available.