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UPSC Civil Service Exam Questions - Engineering

Q1:

Consider the following statements :
Shrinkage of concrete depends upon the
1. relative humidity of the atmosphere.
2. passage of time.
3. applied stress.
Which of these statements is/are correct ?

A 1 and 2

B 2 and 3

C 1 alone

D 1, 2 and 3

ANS:A - 1 and 2

1) Relative humidity if less shrinkage, means more curing with less shrinkage.

2) As the time passes the water in the voids of concrete gets evaporated and hence shrinkage occurs.