Top 50+ Solved Introduction to Noise MCQ Questions Answer
Q. Which part of human ear converts sound vibrations into electrical signals
a. Hammer
b. Stirrup
c. Tympanic membrane
d. Cochlea
Q. Sound is measured by units that are called
a. Hertz (Hz)
b. Decibels (dB)
c. Meters (m)
d. Pascal (Pa)
Q. The loudness of sound varies directly with the vibrating body's
a. Intensity
b. Amplitude
c. Pitch
d. Quality
Q. The scale to measure the intensity level of sound is called
a. Vector scale
b. Measuring ruler
c. Bel scale
d. decibel scale
Q. Following scale is used for loudness of sound or noise
a. Linear scale
b. Logarithmic scale
c. Exponential scale
d. None of the above
Q. Sound power of a machine whose specified sound power level is 125 dB
a. 3.16 w
b. 4.2w
c. 5w
d. 31.6w
Q. The process of maintaining appropriate noise level without consideringeconomic factors is called as _____
a. noise control
b. noise reduction
c. both a. and b.
d. none of the above
Q. Basic elements of noise control are
a. Source ,Path ,Receiver of noise
b. Amplitude and Frequency
c. Time period
d. A and B both
Q. Main sources of noise pollution are
a. Transportation equipment only
b. Heavy machinery only
c. Musical instruments
d. Transportation equipment and heavy machinery
Q. The sound can travel in air when:
a. Particles of medium travel from one place to another
b. There is no moisture in the atmosphere
c. Disturbance travel from one place to another
d. Both particles as well as disturbance travel from one place to another