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UPSC Civil Service Exam Questions - Engineering

Q1:

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

A 4 and 2 mg / m3

B 1 and 2 mg / m3

C 4 and 6 mg / m3

D 5 and 1 mg / m3

ANS:A - 4 and 2 mg / m3

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