UPSC Civil Service Exam Questions - Engineering

Q1:

Consider the following statements :
1. In the laboratory consolidation test, initial compression is the result of displacement of soil particles.
2. Primary consolidation is due to dissipation of pore water pressure.
3. Secondary compression starts after complete dissipation of pore water pressure.
4. Primary consolidation and secondary compression occur simultaneously.
Which of the statements given above are correct ?

A 1 and 4 only

B 2 and 3 only

C 2 and 4 only

D 1 and 3 only

ANS:C - 2 and 4 only

I think option B is wrong. Primary consolidation is due to expulsion of excess pore water pressure not pore water pressure.