UPSC Civil Service Exam Questions - Civil Engineering Questions and Answers

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What are the values of tolerable CO concentration in residential area, for continuous exposure durations of 1 hour and 8 hours, respectively ?

4 and 2 mg / m³

1 and 2 mg / m³

4 and 6 mg / m³

5 and 1 mg / m³

Answer : Option A

Explanation :

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