Civil Engineering MCQAE Level Civil Engineering
Two sound sources emit sound levels of 60 dB and 70 dB simultaneously. The resultant sound level is
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Choose the correct answer
A
70.4 dB
B
80.8 dB
C
130 dB
D
75.6 dB
Correct Answer
A. 70.4 dB
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Resultant = 70 + 10log10(1+10^-1) ≈ 70.4 dB
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This MCQ belongs to WBPSC AE Previous Years Questions Series. Full tests include timed attempts, rank comparison and subject-wise analysis.