Civil Engineering - UPSC Civil Service Exam Questions - Discussion

Discussion Forum : UPSC Civil Service Exam Questions - Section 27 (Q.No. 37)
Consider the following steps :
1. Driving sheet piles surrounding a vibration-receiving structure.
2. Digging a trench around a source of vibration.
3. Placing rubber mountings between a machine causing vibration and its base. Active isolation of vibration can be achieved by
1 and 2
1 and 3
2 and 3
3 alone
Answer: Option
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