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UPSC Civil Service Exam Questions - Engineering

Q1:

Why is super plasticizer added to concrete?
1. To reduce the quantity of mixing water.
2. To increase the consistency.
3. To reduce the quantity of cement.
4. To increase resistance to freezing and thawing.
Select the correct answer using the code given below :

A 1, 2 and 3

B 1, 3 and 4

C 2 and 3

D 4 only

ANS:A - 1, 2 and 3

The right Option should be 1, 2. &4.