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UPSC Civil Service Exam Questions - Engineering

Q1:

Consider the following statements regarding the phenomenon of bulking of sand :
1. It is due to film of water around sand particles.
2. It is due to capillary action.
3. It is more in finer sands.
Which of the following statements given above is/are correct ?

A 1, 2 and 3

B 1 and 3

C 2 and 3

D 1 and 2

ANS:A - 1, 2 and 3

Capillarity is also due to surface tension so we can say bulking is due to surface tension or capillarity.