90 db - Permitted noise level for 500 kW motor running at speed of 1500 rpm

Q.  What is the permitted noise level in db for a 500 kW motor running at a speed of 1500 rpm?
- Published on 30 Sep 15

a. 60 db
b. 75 db
c. 90 db
d. 55 db

ANSWER: 90 db

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