Noise level audible to audience sitting in the 5th row from the stage during a large orchestra show corresponds to about _______________ decibels?

Related Mcqs:

1. Major sources of noise in furnace operation arises from air inspirators, combustion, side wall vibrations and fluctuation in the process heat load. A 50% increase in fuel firing rate may increase the furnace noise level by about ____________ decibels?

   A. 3
   B. 30
   C. 7
   D. 70

2. Noise level heard inside a bus in busy city traffic or inside a sub-way train corresponds to about ______________ decibels?

   A. 75
   B. 95
   C. 120
   D. 140

3. Noise level during normal conversation among men is about ______________ decibels?

   A. 10
   B. 45
   C. 90
   D. 115

4. Noise level in a quiet private business office is about _____________ decibels?

   A. 25
   B. 50
   C. 70
   D. 85

5. Noise level heard at a distance of about 100 metres from a jet engine with after burner is about _____________ decibels?

   A. 120
   B. 140
   C. 170
   D. 200

6. Noise level inside a jet airliner in normal flight is about ______________ decibels?

   A. 80
   B. 100
   C. 125
   D. 150

7. The maximum permissible noise level to which a man working in a chemical plant can be exposed for eight hours per day is about ____________ decibels?

   A. 60
   B. 90
   C. 105
   D. 120

8. Shouting by a man at his full voice corresponds to a voice level of about _____________ decibels?

   A. 25
   B. 50
   C. 80
   D. 120

9. Maximum allowable noise exposure limits for a man working for 8 hours a day in a noisy chemical plant is about ______________ decibels?

   A. 20
   B. 60
   C. 90
   D. 120

10. Noise emitted by a ventilation fan at a distance of 3 metres is about _____________ decibels?

    A. 85
    B. 105
    C. 125
    D. 145