Sound produced by an automobile horn heard at a distance of 1.5 metres corresponds to about ______________ decibels?

Related Mcqs:

1. 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...

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

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

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

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

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

   A. 105 B. 135 C. 160 D. 185...

6. The weakest sound that can be heard by a person in a quiet environment is equivalent to ____________ decibel ?

   A. 1 B. 5 C. 10 D. 50...

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

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

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

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

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. 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...